/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-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:01:10,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:01:10,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:01:10,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:01:10,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:01:10,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:01:10,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:01:10,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:01:10,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:01:10,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:01:10,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:01:10,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:01:10,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:01:10,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:01:10,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:01:10,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:01:10,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:01:10,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:01:10,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:01:10,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:01:10,372 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 17:01:10,379 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:01:10,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:01:10,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:01:10,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:01:10,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:01:10,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:01:10,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:01:10,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:01:10,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:01:10,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:01:10,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:01:10,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:01:10,382 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:01:10,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:01:10,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:01:10,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:01:10,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:01:10,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:01:10,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:10,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:01:10,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:01:10,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:01:10,383 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:01:10,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:01:10,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:01:10,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:01:10,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:01:10,614 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:01:10,617 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:01:10,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2022-01-31 17:01:10,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74da0f628/da369d25fca347f48e835e8c3b0abfef/FLAG46aa04bf5 [2022-01-31 17:01:11,113 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:01:11,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-1.i [2022-01-31 17:01:11,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74da0f628/da369d25fca347f48e835e8c3b0abfef/FLAG46aa04bf5 [2022-01-31 17:01:11,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74da0f628/da369d25fca347f48e835e8c3b0abfef [2022-01-31 17:01:11,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:01:11,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:01:11,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:01:11,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:01:11,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea52171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:01:11,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:01:11,311 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-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2022-01-31 17:01:11,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,358 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:01:11,377 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-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2022-01-31 17:01:11,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:11,422 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:01:11,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11 WrapperNode [2022-01-31 17:01:11,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:11,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:01:11,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:01:11,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:01:11,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:01:11,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:01:11,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:01:11,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (1/1) ... [2022-01-31 17:01:11,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:01:11,512 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 17:01:11,534 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 17:01:11,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:01:11,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:01:11,554 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:01:11,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:01:11,554 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2022-01-31 17:01:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2022-01-31 17:01:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:01:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:01:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:01:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:01:11,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:01:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:01:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:01:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:01:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:01:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2022-01-31 17:01:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:01:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:01:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:01:11,653 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:01:11,654 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:01:11,916 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:01:11,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:01:11,924 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 17:01:11,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:11 BoogieIcfgContainer [2022-01-31 17:01:11,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:01:11,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:01:11,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:01:11,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:01:11,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:01:11" (1/3) ... [2022-01-31 17:01:11,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672f25db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:11" (2/3) ... [2022-01-31 17:01:11,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672f25db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:11, skipping insertion in model container [2022-01-31 17:01:11,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:11" (3/3) ... [2022-01-31 17:01:11,934 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2022-01-31 17:01:11,939 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:01:11,939 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:01:11,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:01:11,993 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 17:01:11,993 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:01:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 17:01:12,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,029 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1850081823, now seen corresponding path program 1 times [2022-01-31 17:01:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686491574] [2022-01-31 17:01:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,250 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686491574] [2022-01-31 17:01:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686491574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:12,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889110937] [2022-01-31 17:01:12,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:12,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:12,288 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,461 INFO L93 Difference]: Finished difference Result 129 states and 190 transitions. [2022-01-31 17:01:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 17:01:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,470 INFO L225 Difference]: With dead ends: 129 [2022-01-31 17:01:12,470 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 17:01:12,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:12,483 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 102 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 61 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 17:01:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2022-01-31 17:01:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:01:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-01-31 17:01:12,523 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 14 [2022-01-31 17:01:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,523 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-01-31 17:01:12,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-01-31 17:01:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:12,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:01:12,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 568160771, now seen corresponding path program 1 times [2022-01-31 17:01:12,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055484350] [2022-01-31 17:01:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,539 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:12,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055484350] [2022-01-31 17:01:12,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055484350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:12,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:12,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:12,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317349385] [2022-01-31 17:01:12,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:12,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:12,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:12,615 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:12,877 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2022-01-31 17:01:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:12,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 17:01:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:12,883 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:01:12,883 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 17:01:12,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:12,887 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:12,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 55 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 17:01:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 52. [2022-01-31 17:01:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:01:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-01-31 17:01:12,911 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 16 [2022-01-31 17:01:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:12,912 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-01-31 17:01:12,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-01-31 17:01:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 17:01:12,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:12,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:12,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:01:12,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 921986469, now seen corresponding path program 2 times [2022-01-31 17:01:12,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823879199] [2022-01-31 17:01:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:12,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:12,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:12,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:12,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823879199] [2022-01-31 17:01:13,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [823879199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859487725] [2022-01-31 17:01:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,036 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,159 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2022-01-31 17:01:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 17:01:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,162 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:01:13,162 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:01:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,165 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 57 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:01:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-01-31 17:01:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:01:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-01-31 17:01:13,186 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 18 [2022-01-31 17:01:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,186 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-01-31 17:01:13,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-01-31 17:01:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:01:13,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:01:13,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,189 INFO L85 PathProgramCache]: Analyzing trace with hash -805140508, now seen corresponding path program 1 times [2022-01-31 17:01:13,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024337026] [2022-01-31 17:01:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 17:01:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:01:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024337026] [2022-01-31 17:01:13,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024337026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453689241] [2022-01-31 17:01:13,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,309 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,430 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2022-01-31 17:01:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-01-31 17:01:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,433 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:01:13,433 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:01:13,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:13,442 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 41 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:01:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-01-31 17:01:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 17:01:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-01-31 17:01:13,455 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 39 [2022-01-31 17:01:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,455 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-01-31 17:01:13,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-01-31 17:01:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:01:13,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:01:13,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1847574718, now seen corresponding path program 1 times [2022-01-31 17:01:13,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540396805] [2022-01-31 17:01:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,464 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 17:01:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:01:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540396805] [2022-01-31 17:01:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540396805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402612869] [2022-01-31 17:01:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,579 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,721 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2022-01-31 17:01:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 17:01:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,722 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:01:13,723 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:01:13,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:13,725 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 83 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 41 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:01:13,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-01-31 17:01:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 17:01:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-01-31 17:01:13,748 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 41 [2022-01-31 17:01:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,748 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-01-31 17:01:13,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-01-31 17:01:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:01:13,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:01:13,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash 678454570, now seen corresponding path program 1 times [2022-01-31 17:01:13,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59845520] [2022-01-31 17:01:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:01:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:01:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 17:01:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 17:01:13,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59845520] [2022-01-31 17:01:13,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [59845520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:13,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463513148] [2022-01-31 17:01:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:13,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:13,889 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 17:01:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,001 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2022-01-31 17:01:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:14,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-01-31 17:01:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,002 INFO L225 Difference]: With dead ends: 93 [2022-01-31 17:01:14,003 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:01:14,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,006 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 52 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:01:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-31 17:01:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-01-31 17:01:14,020 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 53 [2022-01-31 17:01:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-01-31 17:01:14,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 17:01:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-01-31 17:01:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 17:01:14,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:01:14,024 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -51362542, now seen corresponding path program 2 times [2022-01-31 17:01:14,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732146229] [2022-01-31 17:01:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 17:01:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:01:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 17:01:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 17:01:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:14,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732146229] [2022-01-31 17:01:14,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [732146229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:14,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196780666] [2022-01-31 17:01:14,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:14,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:14,154 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,307 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2022-01-31 17:01:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:01:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2022-01-31 17:01:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,309 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:01:14,309 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:01:14,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:14,310 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 104 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 42 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:01:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2022-01-31 17:01:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-01-31 17:01:14,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 58 [2022-01-31 17:01:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,319 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-01-31 17:01:14,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-01-31 17:01:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 17:01:14,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:01:14,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2045800908, now seen corresponding path program 3 times [2022-01-31 17:01:14,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957212186] [2022-01-31 17:01:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 17:01:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:01:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 17:01:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 17:01:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:14,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957212186] [2022-01-31 17:01:14,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1957212186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:14,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326104648] [2022-01-31 17:01:14,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:14,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:14,414 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,664 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2022-01-31 17:01:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-01-31 17:01:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,665 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:01:14,666 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 17:01:14,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:14,667 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 127 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 42 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 17:01:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-01-31 17:01:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-01-31 17:01:14,681 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 60 [2022-01-31 17:01:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,681 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-01-31 17:01:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-01-31 17:01:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 17:01:14,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,683 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:01:14,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1149310678, now seen corresponding path program 4 times [2022-01-31 17:01:14,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268596266] [2022-01-31 17:01:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 17:01:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:01:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 17:01:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 17:01:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:14,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268596266] [2022-01-31 17:01:14,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [268596266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:14,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937612550] [2022-01-31 17:01:14,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:14,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,806 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,007 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2022-01-31 17:01:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-01-31 17:01:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,008 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:01:15,008 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:01:15,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:15,009 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 145 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 42 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:01:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2022-01-31 17:01:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-01-31 17:01:15,018 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 62 [2022-01-31 17:01:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,018 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-01-31 17:01:15,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-01-31 17:01:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 17:01:15,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,019 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:01:15,020 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 749928184, now seen corresponding path program 5 times [2022-01-31 17:01:15,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027171473] [2022-01-31 17:01:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 17:01:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:01:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 17:01:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:01:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:15,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027171473] [2022-01-31 17:01:15,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027171473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:15,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328990862] [2022-01-31 17:01:15,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:15,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:15,118 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,338 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-01-31 17:01:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-01-31 17:01:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,339 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:01:15,339 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 17:01:15,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:15,340 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 42 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 17:01:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2022-01-31 17:01:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-01-31 17:01:15,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 64 [2022-01-31 17:01:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,350 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-01-31 17:01:15,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-01-31 17:01:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 17:01:15,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,351 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:01:15,351 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash -804559206, now seen corresponding path program 6 times [2022-01-31 17:01:15,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088131268] [2022-01-31 17:01:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 17:01:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 17:01:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 17:01:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 17:01:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:15,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088131268] [2022-01-31 17:01:15,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088131268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:15,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439380666] [2022-01-31 17:01:15,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:15,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:15,448 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,725 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2022-01-31 17:01:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-01-31 17:01:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,726 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:01:15,726 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 17:01:15,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:15,727 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 149 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 48 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 17:01:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2022-01-31 17:01:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-01-31 17:01:15,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 66 [2022-01-31 17:01:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,737 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-01-31 17:01:15,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-01-31 17:01:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:01:15,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,738 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:01:15,738 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -18321988, now seen corresponding path program 7 times [2022-01-31 17:01:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823308705] [2022-01-31 17:01:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 17:01:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:01:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 17:01:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 17:01:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:15,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823308705] [2022-01-31 17:01:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [823308705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:15,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053451334] [2022-01-31 17:01:15,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:15,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:15,842 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,168 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2022-01-31 17:01:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:01:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-31 17:01:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,170 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:01:16,170 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:01:16,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:16,171 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 220 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 46 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:01:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 70. [2022-01-31 17:01:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-01-31 17:01:16,186 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 68 [2022-01-31 17:01:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,187 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-01-31 17:01:16,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-01-31 17:01:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 17:01:16,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,191 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:01:16,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash -358599586, now seen corresponding path program 8 times [2022-01-31 17:01:16,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172910002] [2022-01-31 17:01:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,195 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 17:01:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 17:01:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 17:01:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 17:01:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:16,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172910002] [2022-01-31 17:01:16,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172910002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:16,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354066643] [2022-01-31 17:01:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:16,320 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,642 INFO L93 Difference]: Finished difference Result 174 states and 208 transitions. [2022-01-31 17:01:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 70 [2022-01-31 17:01:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,643 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:01:16,643 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 17:01:16,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:16,645 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 241 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 44 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 17:01:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 72. [2022-01-31 17:01:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-01-31 17:01:16,656 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 70 [2022-01-31 17:01:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,656 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-01-31 17:01:16,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-01-31 17:01:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:01:16,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,657 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:01:16,657 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash -947856768, now seen corresponding path program 9 times [2022-01-31 17:01:16,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120352194] [2022-01-31 17:01:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,661 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-31 17:01:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:01:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 17:01:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 17:01:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:16,804 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120352194] [2022-01-31 17:01:16,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2120352194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:01:16,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171460178] [2022-01-31 17:01:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:01:16,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:01:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:16,805 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,158 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2022-01-31 17:01:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 72 [2022-01-31 17:01:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,162 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:01:17,162 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 17:01:17,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=421, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:01:17,163 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 283 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 40 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 17:01:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 74. [2022-01-31 17:01:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 62 states have internal predecessors, (69), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2022-01-31 17:01:17,177 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 72 [2022-01-31 17:01:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,177 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2022-01-31 17:01:17,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2022-01-31 17:01:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 17:01:17,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,178 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:01:17,179 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash -288325598, now seen corresponding path program 10 times [2022-01-31 17:01:17,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878808486] [2022-01-31 17:01:17,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,184 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 17:01:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 17:01:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 17:01:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 17:01:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:17,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878808486] [2022-01-31 17:01:17,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878808486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:17,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167236007] [2022-01-31 17:01:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:17,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:17,334 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,745 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2022-01-31 17:01:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:01:17,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2022-01-31 17:01:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,747 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:01:17,747 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:01:17,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:17,748 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 235 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 48 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:01:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 76. [2022-01-31 17:01:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-01-31 17:01:17,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 74 [2022-01-31 17:01:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,760 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-01-31 17:01:17,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-01-31 17:01:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 17:01:17,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,761 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:01:17,761 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2134031036, now seen corresponding path program 11 times [2022-01-31 17:01:17,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679526651] [2022-01-31 17:01:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 17:01:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 17:01:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 17:01:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 17:01:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:17,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679526651] [2022-01-31 17:01:17,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [679526651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:17,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341531618] [2022-01-31 17:01:17,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:17,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:17,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:17,921 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,376 INFO L93 Difference]: Finished difference Result 198 states and 238 transitions. [2022-01-31 17:01:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:01:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2022-01-31 17:01:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,378 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:01:18,378 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 17:01:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:18,379 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 243 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 46 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 17:01:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 78. [2022-01-31 17:01:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-01-31 17:01:18,392 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 76 [2022-01-31 17:01:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,392 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-01-31 17:01:18,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-01-31 17:01:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 17:01:18,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,393 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:01:18,394 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2035463706, now seen corresponding path program 12 times [2022-01-31 17:01:18,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551316456] [2022-01-31 17:01:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 17:01:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 17:01:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 17:01:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 17:01:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:18,551 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551316456] [2022-01-31 17:01:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [551316456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:01:18,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905124880] [2022-01-31 17:01:18,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:01:18,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:01:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:18,553 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,018 INFO L93 Difference]: Finished difference Result 206 states and 248 transitions. [2022-01-31 17:01:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-01-31 17:01:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,019 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:01:19,020 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:01:19,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:19,021 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 296 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 46 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:01:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 80. [2022-01-31 17:01:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-01-31 17:01:19,033 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 78 [2022-01-31 17:01:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,034 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-01-31 17:01:19,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-01-31 17:01:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 17:01:19,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,035 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:01:19,035 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1801540088, now seen corresponding path program 13 times [2022-01-31 17:01:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174583874] [2022-01-31 17:01:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 17:01:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 17:01:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 17:01:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 17:01:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:19,188 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174583874] [2022-01-31 17:01:19,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174583874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:01:19,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362968323] [2022-01-31 17:01:19,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:01:19,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:01:19,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:19,190 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,701 INFO L93 Difference]: Finished difference Result 214 states and 258 transitions. [2022-01-31 17:01:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:01:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 80 [2022-01-31 17:01:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,704 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:01:19,704 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:01:19,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=399, Invalid=723, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:01:19,705 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 363 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 42 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:01:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 82. [2022-01-31 17:01:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-01-31 17:01:19,737 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 80 [2022-01-31 17:01:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,738 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-01-31 17:01:19,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-01-31 17:01:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:01:19,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,739 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:01:19,739 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,739 INFO L85 PathProgramCache]: Analyzing trace with hash -339242582, now seen corresponding path program 14 times [2022-01-31 17:01:19,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899680666] [2022-01-31 17:01:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 17:01:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 17:01:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 17:01:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 17:01:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:19,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899680666] [2022-01-31 17:01:19,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899680666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:19,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475052389] [2022-01-31 17:01:19,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:19,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:19,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:19,943 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,470 INFO L93 Difference]: Finished difference Result 222 states and 268 transitions. [2022-01-31 17:01:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:01:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 82 [2022-01-31 17:01:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,472 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:01:20,472 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 17:01:20,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=811, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:01:20,473 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 393 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 40 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:01:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 17:01:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 84. [2022-01-31 17:01:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 72 states have internal predecessors, (79), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-01-31 17:01:20,488 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 82 [2022-01-31 17:01:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,488 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-01-31 17:01:20,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-01-31 17:01:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 17:01:20,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,489 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:20,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:01:20,489 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash 474354892, now seen corresponding path program 15 times [2022-01-31 17:01:20,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737010329] [2022-01-31 17:01:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 17:01:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 17:01:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 17:01:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 17:01:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:20,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737010329] [2022-01-31 17:01:20,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [737010329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:01:20,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303338161] [2022-01-31 17:01:20,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:01:20,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:01:20,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:20,703 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,332 INFO L93 Difference]: Finished difference Result 230 states and 278 transitions. [2022-01-31 17:01:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:01:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 84 [2022-01-31 17:01:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,333 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:01:21,333 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 17:01:21,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:21,334 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 315 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 46 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 17:01:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 86. [2022-01-31 17:01:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-01-31 17:01:21,351 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 84 [2022-01-31 17:01:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,351 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-01-31 17:01:21,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-01-31 17:01:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 17:01:21,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,353 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:01:21,353 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 657479534, now seen corresponding path program 16 times [2022-01-31 17:01:21,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667415294] [2022-01-31 17:01:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,355 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 17:01:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 17:01:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 17:01:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 17:01:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:21,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667415294] [2022-01-31 17:01:21,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667415294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:01:21,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020624865] [2022-01-31 17:01:21,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:01:21,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:01:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:21,590 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,235 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2022-01-31 17:01:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:01:22,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 86 [2022-01-31 17:01:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,237 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:01:22,237 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:01:22,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:01:22,238 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 376 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 46 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:01:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 88. [2022-01-31 17:01:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 76 states have internal predecessors, (83), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-01-31 17:01:22,256 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 86 [2022-01-31 17:01:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,256 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-01-31 17:01:22,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-01-31 17:01:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 17:01:22,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,257 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:22,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:01:22,258 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 546601360, now seen corresponding path program 17 times [2022-01-31 17:01:22,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033654594] [2022-01-31 17:01:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,262 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 17:01:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 17:01:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 17:01:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 17:01:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:22,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:22,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033654594] [2022-01-31 17:01:22,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033654594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:22,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:22,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:01:22,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493149704] [2022-01-31 17:01:22,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:22,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:01:22,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:01:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:22,481 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,178 INFO L93 Difference]: Finished difference Result 246 states and 298 transitions. [2022-01-31 17:01:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:01:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 88 [2022-01-31 17:01:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,179 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:01:23,179 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:01:23,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:01:23,181 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 335 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 46 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:01:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 90. [2022-01-31 17:01:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 78 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-01-31 17:01:23,199 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 88 [2022-01-31 17:01:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,199 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-01-31 17:01:23,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-01-31 17:01:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 17:01:23,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,200 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:01:23,200 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1366858546, now seen corresponding path program 18 times [2022-01-31 17:01:23,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588922228] [2022-01-31 17:01:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 17:01:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 17:01:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 17:01:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 17:01:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:23,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588922228] [2022-01-31 17:01:23,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588922228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:01:23,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105056363] [2022-01-31 17:01:23,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:01:23,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:01:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:23,445 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,122 INFO L93 Difference]: Finished difference Result 254 states and 308 transitions. [2022-01-31 17:01:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:01:24,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 90 [2022-01-31 17:01:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,124 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:01:24,124 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 17:01:24,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=679, Invalid=1213, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:01:24,125 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 466 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 42 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 17:01:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 92. [2022-01-31 17:01:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.0875) internal successors, (87), 80 states have internal predecessors, (87), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-01-31 17:01:24,145 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 90 [2022-01-31 17:01:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,145 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-01-31 17:01:24,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-01-31 17:01:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 17:01:24,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,146 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:01:24,147 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash -639968172, now seen corresponding path program 19 times [2022-01-31 17:01:24,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802179356] [2022-01-31 17:01:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 17:01:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 17:01:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 17:01:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 17:01:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:24,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802179356] [2022-01-31 17:01:24,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802179356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:01:24,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753476125] [2022-01-31 17:01:24,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:01:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:01:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:24,414 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:25,208 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2022-01-31 17:01:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:01:25,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 92 [2022-01-31 17:01:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:25,210 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:01:25,210 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 17:01:25,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:01:25,211 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 365 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:25,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 48 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 17:01:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 94. [2022-01-31 17:01:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-01-31 17:01:25,232 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 92 [2022-01-31 17:01:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:25,233 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-01-31 17:01:25,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-01-31 17:01:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 17:01:25,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:25,234 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:25,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:01:25,234 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash -760128266, now seen corresponding path program 20 times [2022-01-31 17:01:25,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:25,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583072625] [2022-01-31 17:01:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:25,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:25,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:25,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:25,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 17:01:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 17:01:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 17:01:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 17:01:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:25,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583072625] [2022-01-31 17:01:25,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [583072625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:25,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:25,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:01:25,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112478257] [2022-01-31 17:01:25,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:01:25,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:25,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:01:25,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:25,497 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:26,272 INFO L93 Difference]: Finished difference Result 270 states and 328 transitions. [2022-01-31 17:01:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:01:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 94 [2022-01-31 17:01:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:26,273 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:01:26,273 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:01:26,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=812, Invalid=1444, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:01:26,275 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 427 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:26,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 46 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:01:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 96. [2022-01-31 17:01:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-01-31 17:01:26,296 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 94 [2022-01-31 17:01:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:26,297 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-01-31 17:01:26,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-01-31 17:01:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 17:01:26,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:26,298 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:26,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:01:26,298 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:26,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:26,298 INFO L85 PathProgramCache]: Analyzing trace with hash -269861608, now seen corresponding path program 21 times [2022-01-31 17:01:26,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:26,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328823641] [2022-01-31 17:01:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:26,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:26,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:26,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:26,302 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 17:01:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 17:01:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 17:01:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 17:01:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:26,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:26,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328823641] [2022-01-31 17:01:26,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [328823641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:26,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:26,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:01:26,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100652746] [2022-01-31 17:01:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:26,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:01:26,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:01:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:01:26,576 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:27,461 INFO L93 Difference]: Finished difference Result 278 states and 338 transitions. [2022-01-31 17:01:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:01:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 96 [2022-01-31 17:01:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:27,463 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:01:27,463 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 17:01:27,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:01:27,464 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 432 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:27,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 46 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:01:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 17:01:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 98. [2022-01-31 17:01:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 86 states have internal predecessors, (93), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-01-31 17:01:27,489 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 96 [2022-01-31 17:01:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:27,489 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-01-31 17:01:27,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-01-31 17:01:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 17:01:27,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:27,490 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:27,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:01:27,490 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1570005830, now seen corresponding path program 22 times [2022-01-31 17:01:27,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:27,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600707792] [2022-01-31 17:01:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:27,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:27,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:27,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:27,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 17:01:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 17:01:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 17:01:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 17:01:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:27,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600707792] [2022-01-31 17:01:27,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600707792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:27,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:27,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:01:27,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030755632] [2022-01-31 17:01:27,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:27,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:01:27,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:01:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:27,781 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:28,751 INFO L93 Difference]: Finished difference Result 286 states and 348 transitions. [2022-01-31 17:01:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:01:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 98 [2022-01-31 17:01:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:28,753 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:01:28,753 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:01:28,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=957, Invalid=1695, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:01:28,754 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 557 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:28,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 44 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:01:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 100. [2022-01-31 17:01:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 states have internal predecessors, (95), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2022-01-31 17:01:28,786 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 98 [2022-01-31 17:01:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:28,787 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2022-01-31 17:01:28,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2022-01-31 17:01:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 17:01:28,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:28,788 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:28,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:01:28,788 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1173120036, now seen corresponding path program 23 times [2022-01-31 17:01:28,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:28,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94218647] [2022-01-31 17:01:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:28,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:28,790 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:28,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:28,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 17:01:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 17:01:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 17:01:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 17:01:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:29,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:29,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94218647] [2022-01-31 17:01:29,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [94218647] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:29,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:29,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:01:29,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348686849] [2022-01-31 17:01:29,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:29,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:01:29,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:01:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:29,094 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:30,013 INFO L93 Difference]: Finished difference Result 294 states and 358 transitions. [2022-01-31 17:01:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:01:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 100 [2022-01-31 17:01:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:30,015 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:01:30,015 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 17:01:30,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1034, Invalid=1828, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:01:30,016 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 431 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:30,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 50 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 17:01:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 102. [2022-01-31 17:01:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.0777777777777777) internal successors, (97), 90 states have internal predecessors, (97), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2022-01-31 17:01:30,043 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 100 [2022-01-31 17:01:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:30,043 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2022-01-31 17:01:30,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2022-01-31 17:01:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 17:01:30,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:30,045 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:30,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:01:30,045 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2017961346, now seen corresponding path program 24 times [2022-01-31 17:01:30,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:30,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3851598] [2022-01-31 17:01:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:30,047 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:30,047 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:30,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:30,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 17:01:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 17:01:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 17:01:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 17:01:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:30,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:30,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3851598] [2022-01-31 17:01:30,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [3851598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:30,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:30,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:01:30,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516192140] [2022-01-31 17:01:30,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:30,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:01:30,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:01:30,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:30,364 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,453 INFO L93 Difference]: Finished difference Result 302 states and 368 transitions. [2022-01-31 17:01:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:01:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 102 [2022-01-31 17:01:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,456 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:01:31,456 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 17:01:31,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1114, Invalid=1966, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:01:31,457 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 550 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 42 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 17:01:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 104. [2022-01-31 17:01:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2022-01-31 17:01:31,479 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 102 [2022-01-31 17:01:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,479 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2022-01-31 17:01:31,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 27 states have internal predecessors, (77), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2022-01-31 17:01:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 17:01:31,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,480 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:01:31,480 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2133325984, now seen corresponding path program 25 times [2022-01-31 17:01:31,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562786764] [2022-01-31 17:01:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,483 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 17:01:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 17:01:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 17:01:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 17:01:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:31,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562786764] [2022-01-31 17:01:31,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562786764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:31,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:31,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:01:31,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519870708] [2022-01-31 17:01:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:31,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:01:31,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:01:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:31,811 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 28 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:32,849 INFO L93 Difference]: Finished difference Result 310 states and 378 transitions. [2022-01-31 17:01:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:01:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 28 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 104 [2022-01-31 17:01:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:32,850 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:01:32,850 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:01:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1197, Invalid=2109, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:01:32,852 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 525 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:32,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 48 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:01:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 106. [2022-01-31 17:01:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2022-01-31 17:01:32,882 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 104 [2022-01-31 17:01:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:32,883 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2022-01-31 17:01:32,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 28 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2022-01-31 17:01:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 17:01:32,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:32,884 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:32,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:01:32,884 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1495832130, now seen corresponding path program 26 times [2022-01-31 17:01:32,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:32,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222814402] [2022-01-31 17:01:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:32,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:32,886 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:32,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:32,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 17:01:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 17:01:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 17:01:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 17:01:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:33,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:33,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222814402] [2022-01-31 17:01:33,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [222814402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:33,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:33,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:01:33,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684271268] [2022-01-31 17:01:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:33,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:01:33,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:01:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:33,249 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 29 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:34,379 INFO L93 Difference]: Finished difference Result 318 states and 388 transitions. [2022-01-31 17:01:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:01:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 29 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 106 [2022-01-31 17:01:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:34,380 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:01:34,380 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 17:01:34,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1283, Invalid=2257, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:01:34,381 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 582 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:34,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 46 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 17:01:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 108. [2022-01-31 17:01:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 96 states have internal predecessors, (103), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2022-01-31 17:01:34,409 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 106 [2022-01-31 17:01:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:34,410 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2022-01-31 17:01:34,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 29 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2022-01-31 17:01:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 17:01:34,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:34,410 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:34,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:01:34,411 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:34,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:34,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1250405532, now seen corresponding path program 27 times [2022-01-31 17:01:34,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:34,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883787510] [2022-01-31 17:01:34,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:34,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:34,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:34,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:34,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 17:01:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 17:01:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 17:01:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 17:01:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:34,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883787510] [2022-01-31 17:01:34,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883787510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:34,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:34,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:01:34,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241564486] [2022-01-31 17:01:34,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:01:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:01:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:34,827 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:36,069 INFO L93 Difference]: Finished difference Result 326 states and 398 transitions. [2022-01-31 17:01:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:01:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 108 [2022-01-31 17:01:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:36,071 INFO L225 Difference]: With dead ends: 326 [2022-01-31 17:01:36,071 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:01:36,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1372, Invalid=2410, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:01:36,072 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 530 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:36,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 48 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:01:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 110. [2022-01-31 17:01:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2022-01-31 17:01:36,108 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 108 [2022-01-31 17:01:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:36,108 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2022-01-31 17:01:36,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2022-01-31 17:01:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 17:01:36,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:36,109 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:01:36,109 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1020088326, now seen corresponding path program 28 times [2022-01-31 17:01:36,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:36,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042457241] [2022-01-31 17:01:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:36,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:36,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:36,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:36,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 17:01:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 17:01:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 17:01:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 17:01:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:36,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042457241] [2022-01-31 17:01:36,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042457241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:36,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:36,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:01:36,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817343565] [2022-01-31 17:01:36,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:36,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:01:36,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:36,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:01:36,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:36,515 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:37,805 INFO L93 Difference]: Finished difference Result 334 states and 408 transitions. [2022-01-31 17:01:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:01:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 110 [2022-01-31 17:01:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:37,807 INFO L225 Difference]: With dead ends: 334 [2022-01-31 17:01:37,807 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 17:01:37,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1464, Invalid=2568, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:01:37,808 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 539 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:37,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 50 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 17:01:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 112. [2022-01-31 17:01:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.07) internal successors, (107), 100 states have internal predecessors, (107), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-01-31 17:01:37,852 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 110 [2022-01-31 17:01:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:37,853 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-01-31 17:01:37,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-01-31 17:01:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 17:01:37,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:37,853 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:37,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:01:37,853 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1121299496, now seen corresponding path program 29 times [2022-01-31 17:01:37,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:37,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316242860] [2022-01-31 17:01:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:37,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:37,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:37,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:37,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 17:01:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 17:01:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 17:01:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 17:01:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:38,338 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:38,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316242860] [2022-01-31 17:01:38,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316242860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:38,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:38,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:01:38,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967398835] [2022-01-31 17:01:38,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:38,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:01:38,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:38,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:01:38,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:01:38,340 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:39,776 INFO L93 Difference]: Finished difference Result 342 states and 418 transitions. [2022-01-31 17:01:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:01:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 112 [2022-01-31 17:01:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:39,778 INFO L225 Difference]: With dead ends: 342 [2022-01-31 17:01:39,778 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 17:01:39,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1559, Invalid=2731, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:01:39,780 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 504 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:39,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 52 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 17:01:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 114. [2022-01-31 17:01:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 states have internal predecessors, (109), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-01-31 17:01:39,824 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 112 [2022-01-31 17:01:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:39,824 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-01-31 17:01:39,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-01-31 17:01:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 17:01:39,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:39,825 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:39,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:01:39,825 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -399013942, now seen corresponding path program 30 times [2022-01-31 17:01:39,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:39,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609905895] [2022-01-31 17:01:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:39,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:39,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:39,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:39,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 17:01:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 17:01:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 17:01:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 17:01:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:40,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:40,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609905895] [2022-01-31 17:01:40,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [609905895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:40,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:40,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:01:40,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608749137] [2022-01-31 17:01:40,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:40,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:01:40,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:01:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:40,264 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 33 states have internal predecessors, (89), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:41,761 INFO L93 Difference]: Finished difference Result 350 states and 428 transitions. [2022-01-31 17:01:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:01:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 33 states have internal predecessors, (89), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 114 [2022-01-31 17:01:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:41,763 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:01:41,763 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 17:01:41,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1657, Invalid=2899, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:01:41,765 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 530 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:41,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 54 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 17:01:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 116. [2022-01-31 17:01:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 104 states have (on average 1.0673076923076923) internal successors, (111), 104 states have internal predecessors, (111), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2022-01-31 17:01:41,805 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 114 [2022-01-31 17:01:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:41,805 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2022-01-31 17:01:41,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 33 states have internal predecessors, (89), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2022-01-31 17:01:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 17:01:41,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:41,806 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:01:41,807 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1131347220, now seen corresponding path program 31 times [2022-01-31 17:01:41,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195690355] [2022-01-31 17:01:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:41,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:41,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:41,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:41,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 17:01:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 17:01:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 17:01:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 17:01:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:42,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195690355] [2022-01-31 17:01:42,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195690355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:42,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:42,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:01:42,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484605975] [2022-01-31 17:01:42,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:42,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:01:42,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:01:42,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:01:42,279 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 34 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:43,885 INFO L93 Difference]: Finished difference Result 358 states and 438 transitions. [2022-01-31 17:01:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:01:43,886 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 34 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 116 [2022-01-31 17:01:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:43,887 INFO L225 Difference]: With dead ends: 358 [2022-01-31 17:01:43,887 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 17:01:43,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1758, Invalid=3072, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:01:43,888 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 651 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:43,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 48 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 17:01:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 118. [2022-01-31 17:01:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0660377358490567) internal successors, (113), 106 states have internal predecessors, (113), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2022-01-31 17:01:43,924 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 116 [2022-01-31 17:01:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:43,924 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2022-01-31 17:01:43,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 34 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2022-01-31 17:01:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 17:01:43,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:43,926 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:43,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:01:43,926 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:43,927 INFO L85 PathProgramCache]: Analyzing trace with hash -528990834, now seen corresponding path program 32 times [2022-01-31 17:01:43,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:43,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875438631] [2022-01-31 17:01:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:43,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:43,929 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:43,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:43,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 17:01:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 17:01:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 17:01:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 17:01:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:44,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875438631] [2022-01-31 17:01:44,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875438631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:44,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:44,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:01:44,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192222502] [2022-01-31 17:01:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:44,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:01:44,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:01:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:44,429 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:46,077 INFO L93 Difference]: Finished difference Result 366 states and 448 transitions. [2022-01-31 17:01:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:01:46,079 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 118 [2022-01-31 17:01:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:46,082 INFO L225 Difference]: With dead ends: 366 [2022-01-31 17:01:46,082 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 17:01:46,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:01:46,085 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 631 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:46,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 44 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 17:01:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 120. [2022-01-31 17:01:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 108 states have internal predecessors, (115), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2022-01-31 17:01:46,126 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 118 [2022-01-31 17:01:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:46,126 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2022-01-31 17:01:46,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 35 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2022-01-31 17:01:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 17:01:46,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:46,127 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:46,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:01:46,127 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1485088848, now seen corresponding path program 33 times [2022-01-31 17:01:46,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:46,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901888345] [2022-01-31 17:01:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:46,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:46,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:46,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:46,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 17:01:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 17:01:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 17:01:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 17:01:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:46,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901888345] [2022-01-31 17:01:46,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901888345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:46,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:46,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:01:46,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856523562] [2022-01-31 17:01:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:01:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:01:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:46,643 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 36 states have internal predecessors, (95), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:48,391 INFO L93 Difference]: Finished difference Result 374 states and 458 transitions. [2022-01-31 17:01:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:01:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 36 states have internal predecessors, (95), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 120 [2022-01-31 17:01:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:48,393 INFO L225 Difference]: With dead ends: 374 [2022-01-31 17:01:48,393 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 17:01:48,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1969, Invalid=3433, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:01:48,393 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 774 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:48,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 40 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:01:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 17:01:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 122. [2022-01-31 17:01:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2022-01-31 17:01:48,425 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 120 [2022-01-31 17:01:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:48,425 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2022-01-31 17:01:48,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 36 states have internal predecessors, (95), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2022-01-31 17:01:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 17:01:48,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:48,426 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:48,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:01:48,426 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1172278958, now seen corresponding path program 34 times [2022-01-31 17:01:48,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256723979] [2022-01-31 17:01:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:48,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:48,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:48,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:48,430 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 17:01:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 17:01:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 17:01:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 17:01:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:48,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256723979] [2022-01-31 17:01:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256723979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:48,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:48,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:01:48,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604573934] [2022-01-31 17:01:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:48,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:01:48,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:48,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:01:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:48,990 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:50,822 INFO L93 Difference]: Finished difference Result 382 states and 468 transitions. [2022-01-31 17:01:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:01:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 122 [2022-01-31 17:01:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:50,824 INFO L225 Difference]: With dead ends: 382 [2022-01-31 17:01:50,824 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 17:01:50,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:01:50,825 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 690 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:50,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 48 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 17:01:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 124. [2022-01-31 17:01:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2022-01-31 17:01:50,864 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 122 [2022-01-31 17:01:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:50,865 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2022-01-31 17:01:50,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2022-01-31 17:01:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 17:01:50,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:50,866 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:50,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:01:50,866 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1209685388, now seen corresponding path program 35 times [2022-01-31 17:01:50,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:50,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985467151] [2022-01-31 17:01:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:50,870 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:50,870 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:50,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:50,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 17:01:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 17:01:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 17:01:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 17:01:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:51,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985467151] [2022-01-31 17:01:51,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985467151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:51,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:51,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:01:51,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937477982] [2022-01-31 17:01:51,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:51,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:01:51,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:51,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:01:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:01:51,480 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 38 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:53,444 INFO L93 Difference]: Finished difference Result 390 states and 478 transitions. [2022-01-31 17:01:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:01:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 38 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 124 [2022-01-31 17:01:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:53,446 INFO L225 Difference]: With dead ends: 390 [2022-01-31 17:01:53,446 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 17:01:53,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2192, Invalid=3814, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:01:53,447 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 871 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:53,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 48 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 17:01:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 126. [2022-01-31 17:01:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 114 states have (on average 1.0614035087719298) internal successors, (121), 114 states have internal predecessors, (121), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2022-01-31 17:01:53,496 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 124 [2022-01-31 17:01:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:53,496 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2022-01-31 17:01:53,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 38 states have internal predecessors, (99), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2022-01-31 17:01:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 17:01:53,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:53,497 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:53,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:01:53,497 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:53,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1497441046, now seen corresponding path program 36 times [2022-01-31 17:01:53,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:53,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602498077] [2022-01-31 17:01:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:53,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:53,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:53,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:53,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 17:01:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 17:01:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 17:01:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 17:01:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:54,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602498077] [2022-01-31 17:01:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602498077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:54,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:54,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:01:54,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352559226] [2022-01-31 17:01:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:54,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:01:54,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:01:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:54,132 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 39 states have internal predecessors, (101), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:56,196 INFO L93 Difference]: Finished difference Result 398 states and 488 transitions. [2022-01-31 17:01:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:01:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 39 states have internal predecessors, (101), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 126 [2022-01-31 17:01:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:56,197 INFO L225 Difference]: With dead ends: 398 [2022-01-31 17:01:56,198 INFO L226 Difference]: Without dead ends: 351 [2022-01-31 17:01:56,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2308, Invalid=4012, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:01:56,199 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 694 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:56,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 48 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-31 17:01:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 128. [2022-01-31 17:01:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 116 states have internal predecessors, (123), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-01-31 17:01:56,251 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 126 [2022-01-31 17:01:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:56,251 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-01-31 17:01:56,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 39 states have internal predecessors, (101), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-01-31 17:01:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 17:01:56,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:56,252 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:01:56,252 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:56,253 INFO L85 PathProgramCache]: Analyzing trace with hash 295762744, now seen corresponding path program 37 times [2022-01-31 17:01:56,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:56,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536072659] [2022-01-31 17:01:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:56,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:56,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:56,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:56,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 17:01:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 17:01:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 17:01:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 17:01:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:56,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:56,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536072659] [2022-01-31 17:01:56,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1536072659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:56,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:56,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:01:56,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255383342] [2022-01-31 17:01:56,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:01:56,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:01:56,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:01:56,895 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 40 states have internal predecessors, (103), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:59,142 INFO L93 Difference]: Finished difference Result 406 states and 498 transitions. [2022-01-31 17:01:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:01:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 40 states have internal predecessors, (103), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 128 [2022-01-31 17:01:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:59,144 INFO L225 Difference]: With dead ends: 406 [2022-01-31 17:01:59,144 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:01:59,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2427, Invalid=4215, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:01:59,145 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 888 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:59,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 40 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:01:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:01:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 130. [2022-01-31 17:01:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 118 states have internal predecessors, (125), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:01:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2022-01-31 17:01:59,191 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 128 [2022-01-31 17:01:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:59,192 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2022-01-31 17:01:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 40 states have internal predecessors, (103), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:01:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2022-01-31 17:01:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 17:01:59,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:59,193 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:59,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:01:59,193 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 829117146, now seen corresponding path program 38 times [2022-01-31 17:01:59,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:59,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960345185] [2022-01-31 17:01:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:59,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:59,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:59,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:59,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-01-31 17:01:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 17:01:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 17:01:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 17:01:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:01:59,867 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:59,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960345185] [2022-01-31 17:01:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1960345185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:59,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:59,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:01:59,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365619874] [2022-01-31 17:01:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:59,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:01:59,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:01:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:01:59,871 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 41 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:02,243 INFO L93 Difference]: Finished difference Result 414 states and 508 transitions. [2022-01-31 17:02:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:02:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 41 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 130 [2022-01-31 17:02:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:02,245 INFO L225 Difference]: With dead ends: 414 [2022-01-31 17:02:02,245 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 17:02:02,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2549, Invalid=4423, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:02:02,246 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 767 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:02,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 46 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 17:02:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 132. [2022-01-31 17:02:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.0583333333333333) internal successors, (127), 120 states have internal predecessors, (127), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2022-01-31 17:02:02,297 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 130 [2022-01-31 17:02:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:02,297 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2022-01-31 17:02:02,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 41 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2022-01-31 17:02:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 17:02:02,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:02,298 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:02,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:02:02,298 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:02,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2013378052, now seen corresponding path program 39 times [2022-01-31 17:02:02,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:02,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354872613] [2022-01-31 17:02:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:02,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:02,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:02,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:02,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 17:02:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 17:02:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 17:02:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 17:02:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:02,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354872613] [2022-01-31 17:02:02,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [354872613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:02,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:02,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:02:02,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137384994] [2022-01-31 17:02:02,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:02,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:02:02,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:02:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:02:02,950 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:05,482 INFO L93 Difference]: Finished difference Result 422 states and 518 transitions. [2022-01-31 17:02:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:02:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 132 [2022-01-31 17:02:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:05,484 INFO L225 Difference]: With dead ends: 422 [2022-01-31 17:02:05,484 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 17:02:05,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2674, Invalid=4636, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:02:05,485 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 847 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:05,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 46 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 17:02:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 134. [2022-01-31 17:02:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.0573770491803278) internal successors, (129), 122 states have internal predecessors, (129), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2022-01-31 17:02:05,530 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 132 [2022-01-31 17:02:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2022-01-31 17:02:05,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2022-01-31 17:02:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 17:02:05,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:05,531 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:05,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:02:05,531 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2052063074, now seen corresponding path program 40 times [2022-01-31 17:02:05,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230317538] [2022-01-31 17:02:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:05,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:05,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:05,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:05,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 17:02:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 17:02:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 17:02:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 17:02:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:06,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230317538] [2022-01-31 17:02:06,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230317538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:06,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:06,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:02:06,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969790] [2022-01-31 17:02:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:06,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:02:06,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:02:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:02:06,247 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 43 states have internal predecessors, (109), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:08,812 INFO L93 Difference]: Finished difference Result 430 states and 528 transitions. [2022-01-31 17:02:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:02:08,813 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 43 states have internal predecessors, (109), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 134 [2022-01-31 17:02:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:08,814 INFO L225 Difference]: With dead ends: 430 [2022-01-31 17:02:08,814 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 17:02:08,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:02:08,815 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 831 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:08,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 48 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 17:02:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 136. [2022-01-31 17:02:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 124 states have (on average 1.0564516129032258) internal successors, (131), 124 states have internal predecessors, (131), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2022-01-31 17:02:08,871 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 134 [2022-01-31 17:02:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:08,871 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2022-01-31 17:02:08,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 43 states have internal predecessors, (109), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2022-01-31 17:02:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 17:02:08,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:08,872 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:08,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:02:08,872 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:08,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash -573663552, now seen corresponding path program 41 times [2022-01-31 17:02:08,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:08,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308950526] [2022-01-31 17:02:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:08,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:08,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:08,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:08,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 17:02:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 17:02:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 17:02:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 17:02:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:09,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:09,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308950526] [2022-01-31 17:02:09,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308950526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:09,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:09,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:02:09,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357182283] [2022-01-31 17:02:09,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:09,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:02:09,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:09,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:02:09,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:02:09,583 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 44 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:12,289 INFO L93 Difference]: Finished difference Result 438 states and 538 transitions. [2022-01-31 17:02:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:02:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 44 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 136 [2022-01-31 17:02:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:12,290 INFO L225 Difference]: With dead ends: 438 [2022-01-31 17:02:12,291 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 17:02:12,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2933, Invalid=5077, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:02:12,291 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 825 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:12,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 44 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:02:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 17:02:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 138. [2022-01-31 17:02:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2022-01-31 17:02:12,341 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 136 [2022-01-31 17:02:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:12,341 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2022-01-31 17:02:12,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 44 states have internal predecessors, (111), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2022-01-31 17:02:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 17:02:12,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:12,342 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:02:12,343 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1465897886, now seen corresponding path program 42 times [2022-01-31 17:02:12,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140640094] [2022-01-31 17:02:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:12,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:12,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:12,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:12,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-31 17:02:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 17:02:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 17:02:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 17:02:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:13,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:13,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140640094] [2022-01-31 17:02:13,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140640094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:13,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:13,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:02:13,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227355100] [2022-01-31 17:02:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:13,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:02:13,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:02:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:02:13,102 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 45 states have internal predecessors, (113), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:15,947 INFO L93 Difference]: Finished difference Result 446 states and 548 transitions. [2022-01-31 17:02:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:02:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 45 states have internal predecessors, (113), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 138 [2022-01-31 17:02:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:15,948 INFO L225 Difference]: With dead ends: 446 [2022-01-31 17:02:15,948 INFO L226 Difference]: Without dead ends: 399 [2022-01-31 17:02:15,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3067, Invalid=5305, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:02:15,949 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 885 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:15,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 42 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-31 17:02:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 140. [2022-01-31 17:02:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.0546875) internal successors, (135), 128 states have internal predecessors, (135), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2022-01-31 17:02:16,011 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 138 [2022-01-31 17:02:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:16,011 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2022-01-31 17:02:16,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 45 states have internal predecessors, (113), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2022-01-31 17:02:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 17:02:16,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:16,012 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:16,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:02:16,012 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash 90366340, now seen corresponding path program 43 times [2022-01-31 17:02:16,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:16,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387787002] [2022-01-31 17:02:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:16,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:16,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:16,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:16,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 17:02:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 17:02:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 17:02:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 17:02:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:16,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:16,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387787002] [2022-01-31 17:02:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [387787002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:16,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:16,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:02:16,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884763582] [2022-01-31 17:02:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:16,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:02:16,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:02:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:02:16,838 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 46 states have internal predecessors, (115), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:19,766 INFO L93 Difference]: Finished difference Result 454 states and 558 transitions. [2022-01-31 17:02:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:02:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 46 states have internal predecessors, (115), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 140 [2022-01-31 17:02:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:19,768 INFO L225 Difference]: With dead ends: 454 [2022-01-31 17:02:19,768 INFO L226 Difference]: Without dead ends: 407 [2022-01-31 17:02:19,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3204, Invalid=5538, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:02:19,769 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 972 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:19,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 42 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-31 17:02:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 142. [2022-01-31 17:02:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.0538461538461539) internal successors, (137), 130 states have internal predecessors, (137), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2022-01-31 17:02:19,843 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 140 [2022-01-31 17:02:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:19,843 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2022-01-31 17:02:19,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 46 states have internal predecessors, (115), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2022-01-31 17:02:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 17:02:19,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:19,844 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:19,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:02:19,844 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1011668518, now seen corresponding path program 44 times [2022-01-31 17:02:19,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:19,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875863602] [2022-01-31 17:02:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:19,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:19,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:19,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:19,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 17:02:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 17:02:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 17:02:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 17:02:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:20,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875863602] [2022-01-31 17:02:20,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875863602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:20,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:20,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:02:20,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587772745] [2022-01-31 17:02:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:20,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:02:20,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:02:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:02:20,686 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 47 states have internal predecessors, (117), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:23,774 INFO L93 Difference]: Finished difference Result 462 states and 568 transitions. [2022-01-31 17:02:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:02:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 47 states have internal predecessors, (117), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 142 [2022-01-31 17:02:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:23,776 INFO L225 Difference]: With dead ends: 462 [2022-01-31 17:02:23,776 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 17:02:23,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3344, Invalid=5776, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:02:23,777 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 954 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:23,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 48 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 17:02:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 144. [2022-01-31 17:02:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 132 states have (on average 1.053030303030303) internal successors, (139), 132 states have internal predecessors, (139), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-01-31 17:02:23,840 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 142 [2022-01-31 17:02:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:23,840 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-01-31 17:02:23,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 47 states have internal predecessors, (117), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-01-31 17:02:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 17:02:23,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:23,841 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:23,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:02:23,841 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:23,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1619798600, now seen corresponding path program 45 times [2022-01-31 17:02:23,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:23,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027447510] [2022-01-31 17:02:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:23,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:23,844 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:23,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:23,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 17:02:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 17:02:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 17:02:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 17:02:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:24,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:24,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027447510] [2022-01-31 17:02:24,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027447510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:24,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:24,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:02:24,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722664080] [2022-01-31 17:02:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:24,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:02:24,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:02:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:02:24,669 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:27,922 INFO L93 Difference]: Finished difference Result 470 states and 578 transitions. [2022-01-31 17:02:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:02:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 144 [2022-01-31 17:02:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:27,924 INFO L225 Difference]: With dead ends: 470 [2022-01-31 17:02:27,924 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 17:02:27,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3487, Invalid=6019, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:02:27,925 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 874 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:27,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 48 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 17:02:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 146. [2022-01-31 17:02:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 134 states have internal predecessors, (141), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2022-01-31 17:02:28,003 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 144 [2022-01-31 17:02:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:28,003 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2022-01-31 17:02:28,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 48 states have internal predecessors, (119), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2022-01-31 17:02:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 17:02:28,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:28,004 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:28,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:02:28,004 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1917255146, now seen corresponding path program 46 times [2022-01-31 17:02:28,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557832275] [2022-01-31 17:02:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:28,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:28,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:28,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:28,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-31 17:02:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 17:02:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 17:02:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 17:02:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:28,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:28,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557832275] [2022-01-31 17:02:28,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [557832275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:28,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:28,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:02:28,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427530767] [2022-01-31 17:02:28,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:02:28,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:02:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:02:28,917 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 49 states have internal predecessors, (121), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:32,356 INFO L93 Difference]: Finished difference Result 478 states and 588 transitions. [2022-01-31 17:02:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:02:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 49 states have internal predecessors, (121), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 146 [2022-01-31 17:02:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:32,359 INFO L225 Difference]: With dead ends: 478 [2022-01-31 17:02:32,359 INFO L226 Difference]: Without dead ends: 431 [2022-01-31 17:02:32,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3633, Invalid=6267, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:02:32,360 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1059 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:32,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1060 Valid, 44 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-31 17:02:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 148. [2022-01-31 17:02:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.0514705882352942) internal successors, (143), 136 states have internal predecessors, (143), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 156 transitions. [2022-01-31 17:02:32,443 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 156 transitions. Word has length 146 [2022-01-31 17:02:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:32,443 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 156 transitions. [2022-01-31 17:02:32,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 49 states have internal predecessors, (121), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 156 transitions. [2022-01-31 17:02:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 17:02:32,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:32,444 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:32,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:02:32,445 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 10187020, now seen corresponding path program 47 times [2022-01-31 17:02:32,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:32,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284443745] [2022-01-31 17:02:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:32,447 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:32,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:32,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:32,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 17:02:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 17:02:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 17:02:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 17:02:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:33,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:33,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284443745] [2022-01-31 17:02:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [284443745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:33,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:33,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:02:33,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039663857] [2022-01-31 17:02:33,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:33,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:02:33,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:02:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:02:33,383 INFO L87 Difference]: Start difference. First operand 148 states and 156 transitions. Second operand has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 50 states have internal predecessors, (123), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:36,995 INFO L93 Difference]: Finished difference Result 486 states and 598 transitions. [2022-01-31 17:02:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:02:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 50 states have internal predecessors, (123), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 148 [2022-01-31 17:02:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:36,998 INFO L225 Difference]: With dead ends: 486 [2022-01-31 17:02:36,998 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 17:02:36,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3782, Invalid=6520, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:02:36,999 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1003 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:36,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 44 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 17:02:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 150. [2022-01-31 17:02:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.0507246376811594) internal successors, (145), 138 states have internal predecessors, (145), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2022-01-31 17:02:37,073 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 148 [2022-01-31 17:02:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:37,073 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2022-01-31 17:02:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 50 states have internal predecessors, (123), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2022-01-31 17:02:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 17:02:37,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:37,074 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:37,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:02:37,074 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:37,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1268753326, now seen corresponding path program 48 times [2022-01-31 17:02:37,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304793622] [2022-01-31 17:02:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:37,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:37,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:37,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:37,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 17:02:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 17:02:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 17:02:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 17:02:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:38,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304793622] [2022-01-31 17:02:38,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304793622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:38,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:38,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:02:38,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073123562] [2022-01-31 17:02:38,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:38,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:02:38,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:02:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:02:38,027 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 51 states have internal predecessors, (125), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:41,842 INFO L93 Difference]: Finished difference Result 494 states and 608 transitions. [2022-01-31 17:02:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:02:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 51 states have internal predecessors, (125), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 150 [2022-01-31 17:02:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:41,844 INFO L225 Difference]: With dead ends: 494 [2022-01-31 17:02:41,844 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 17:02:41,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3934, Invalid=6778, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:02:41,845 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 896 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:41,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 52 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 17:02:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 152. [2022-01-31 17:02:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 140 states have (on average 1.05) internal successors, (147), 140 states have internal predecessors, (147), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2022-01-31 17:02:41,906 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 150 [2022-01-31 17:02:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:41,906 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2022-01-31 17:02:41,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 51 states have internal predecessors, (125), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2022-01-31 17:02:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 17:02:41,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:41,907 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:41,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:02:41,907 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash -429804080, now seen corresponding path program 49 times [2022-01-31 17:02:41,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:41,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079776318] [2022-01-31 17:02:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:41,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:41,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:41,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:41,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-31 17:02:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 17:02:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 17:02:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 17:02:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:42,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:42,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079776318] [2022-01-31 17:02:42,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079776318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:42,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:42,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:02:42,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406874046] [2022-01-31 17:02:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:42,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:02:42,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:02:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:02:42,842 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 52 states have internal predecessors, (127), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:46,852 INFO L93 Difference]: Finished difference Result 502 states and 618 transitions. [2022-01-31 17:02:46,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:02:46,853 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 52 states have internal predecessors, (127), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 152 [2022-01-31 17:02:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:46,854 INFO L225 Difference]: With dead ends: 502 [2022-01-31 17:02:46,854 INFO L226 Difference]: Without dead ends: 455 [2022-01-31 17:02:46,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4089, Invalid=7041, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:02:46,855 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1114 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:46,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 48 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-31 17:02:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 154. [2022-01-31 17:02:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 142 states have internal predecessors, (149), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2022-01-31 17:02:46,922 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 152 [2022-01-31 17:02:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:46,922 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2022-01-31 17:02:46,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 52 states have internal predecessors, (127), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2022-01-31 17:02:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 17:02:46,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:46,924 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:46,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:02:46,924 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash -655898766, now seen corresponding path program 50 times [2022-01-31 17:02:46,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334449504] [2022-01-31 17:02:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:46,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:46,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:46,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:46,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-31 17:02:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 17:02:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 17:02:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 17:02:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:47,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:47,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334449504] [2022-01-31 17:02:47,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [334449504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:47,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:47,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:02:47,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907560936] [2022-01-31 17:02:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:47,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:02:47,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:02:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:02:47,908 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 53 states have internal predecessors, (129), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:52,163 INFO L93 Difference]: Finished difference Result 510 states and 628 transitions. [2022-01-31 17:02:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:02:52,163 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 53 states have internal predecessors, (129), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 154 [2022-01-31 17:02:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:52,165 INFO L225 Difference]: With dead ends: 510 [2022-01-31 17:02:52,165 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 17:02:52,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4247, Invalid=7309, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:02:52,166 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1119 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:52,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 44 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 17:02:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 156. [2022-01-31 17:02:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 144 states have internal predecessors, (151), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 164 transitions. [2022-01-31 17:02:52,236 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 164 transitions. Word has length 154 [2022-01-31 17:02:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:52,236 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 164 transitions. [2022-01-31 17:02:52,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 53 states have internal predecessors, (129), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 164 transitions. [2022-01-31 17:02:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 17:02:52,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:52,237 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:52,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:02:52,237 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1110440084, now seen corresponding path program 51 times [2022-01-31 17:02:52,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:52,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668859291] [2022-01-31 17:02:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:52,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:52,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:52,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:52,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 17:02:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 17:02:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 17:02:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 17:02:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:53,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:53,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668859291] [2022-01-31 17:02:53,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [668859291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:53,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:53,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:02:53,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508392563] [2022-01-31 17:02:53,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:02:53,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:02:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:02:53,267 INFO L87 Difference]: Start difference. First operand 156 states and 164 transitions. Second operand has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 54 states have internal predecessors, (131), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:57,855 INFO L93 Difference]: Finished difference Result 518 states and 638 transitions. [2022-01-31 17:02:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:02:57,856 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 54 states have internal predecessors, (131), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 156 [2022-01-31 17:02:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:57,857 INFO L225 Difference]: With dead ends: 518 [2022-01-31 17:02:57,857 INFO L226 Difference]: Without dead ends: 471 [2022-01-31 17:02:57,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4408, Invalid=7582, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:02:57,859 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1022 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:57,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 46 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:02:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-31 17:02:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 158. [2022-01-31 17:02:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.047945205479452) internal successors, (153), 146 states have internal predecessors, (153), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:02:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 166 transitions. [2022-01-31 17:02:57,936 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 166 transitions. Word has length 156 [2022-01-31 17:02:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:57,936 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 166 transitions. [2022-01-31 17:02:57,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.3392857142857144) internal successors, (131), 54 states have internal predecessors, (131), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:02:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 166 transitions. [2022-01-31 17:02:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 17:02:57,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:57,937 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:57,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:02:57,937 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2049993014, now seen corresponding path program 52 times [2022-01-31 17:02:57,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:57,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853802313] [2022-01-31 17:02:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:57,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:57,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:57,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:57,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:58,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 17:02:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:59,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 17:02:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:59,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 17:02:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:59,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 17:02:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:02:59,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:59,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853802313] [2022-01-31 17:02:59,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [853802313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:59,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:59,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:02:59,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872603108] [2022-01-31 17:02:59,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:59,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:02:59,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:02:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:02:59,017 INFO L87 Difference]: Start difference. First operand 158 states and 166 transitions. Second operand has 57 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 55 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:03,861 INFO L93 Difference]: Finished difference Result 526 states and 648 transitions. [2022-01-31 17:03:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:03:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 55 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 158 [2022-01-31 17:03:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:03,863 INFO L225 Difference]: With dead ends: 526 [2022-01-31 17:03:03,863 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 17:03:03,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4572, Invalid=7860, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:03:03,864 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:03,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1168 Valid, 52 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 17:03:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 160. [2022-01-31 17:03:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 148 states have (on average 1.0472972972972974) internal successors, (155), 148 states have internal predecessors, (155), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2022-01-31 17:03:03,949 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 158 [2022-01-31 17:03:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:03,949 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2022-01-31 17:03:03,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 55 states have internal predecessors, (133), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2022-01-31 17:03:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 17:03:03,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:03,950 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:03,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:03:03,951 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1277740712, now seen corresponding path program 53 times [2022-01-31 17:03:03,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518985096] [2022-01-31 17:03:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:03,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:03,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:03,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:03,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-31 17:03:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:05,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-01-31 17:03:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:05,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 17:03:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:05,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 17:03:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:05,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518985096] [2022-01-31 17:03:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518985096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:05,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:05,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:03:05,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976920115] [2022-01-31 17:03:05,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:05,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:03:05,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:03:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:03:05,102 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 56 states have internal predecessors, (135), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:10,219 INFO L93 Difference]: Finished difference Result 534 states and 658 transitions. [2022-01-31 17:03:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:03:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 56 states have internal predecessors, (135), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 160 [2022-01-31 17:03:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:10,221 INFO L225 Difference]: With dead ends: 534 [2022-01-31 17:03:10,221 INFO L226 Difference]: Without dead ends: 487 [2022-01-31 17:03:10,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4739, Invalid=8143, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:03:10,222 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1072 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:10,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 50 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-31 17:03:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 162. [2022-01-31 17:03:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 170 transitions. [2022-01-31 17:03:10,311 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 170 transitions. Word has length 160 [2022-01-31 17:03:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:10,311 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 170 transitions. [2022-01-31 17:03:10,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 56 states have internal predecessors, (135), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 170 transitions. [2022-01-31 17:03:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 17:03:10,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:10,312 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:10,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:03:10,312 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash 520784122, now seen corresponding path program 54 times [2022-01-31 17:03:10,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:10,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128248373] [2022-01-31 17:03:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:10,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:10,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:10,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:10,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 17:03:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-31 17:03:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 17:03:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 17:03:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:11,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128248373] [2022-01-31 17:03:11,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128248373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:11,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:11,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:03:11,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350209175] [2022-01-31 17:03:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:11,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:03:11,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:03:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:03:11,442 INFO L87 Difference]: Start difference. First operand 162 states and 170 transitions. Second operand has 59 states, 59 states have (on average 2.3220338983050848) internal successors, (137), 57 states have internal predecessors, (137), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:16,793 INFO L93 Difference]: Finished difference Result 542 states and 668 transitions. [2022-01-31 17:03:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:03:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3220338983050848) internal successors, (137), 57 states have internal predecessors, (137), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 162 [2022-01-31 17:03:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:16,795 INFO L225 Difference]: With dead ends: 542 [2022-01-31 17:03:16,795 INFO L226 Difference]: Without dead ends: 495 [2022-01-31 17:03:16,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4909, Invalid=8431, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:03:16,797 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1047 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:16,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 50 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-31 17:03:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 164. [2022-01-31 17:03:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.0460526315789473) internal successors, (159), 152 states have internal predecessors, (159), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2022-01-31 17:03:16,881 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 162 [2022-01-31 17:03:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2022-01-31 17:03:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3220338983050848) internal successors, (137), 57 states have internal predecessors, (137), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2022-01-31 17:03:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 17:03:16,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:16,882 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:03:16,882 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1968670692, now seen corresponding path program 55 times [2022-01-31 17:03:16,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:16,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228737772] [2022-01-31 17:03:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:16,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:16,884 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:16,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:16,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 17:03:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:18,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 17:03:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:18,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 17:03:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 17:03:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:18,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:18,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228737772] [2022-01-31 17:03:18,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1228737772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:18,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:18,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:03:18,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901596584] [2022-01-31 17:03:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:18,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:03:18,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:03:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:03:18,066 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand has 60 states, 60 states have (on average 2.316666666666667) internal successors, (139), 58 states have internal predecessors, (139), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:23,713 INFO L93 Difference]: Finished difference Result 550 states and 678 transitions. [2022-01-31 17:03:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:03:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.316666666666667) internal successors, (139), 58 states have internal predecessors, (139), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 164 [2022-01-31 17:03:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:23,715 INFO L225 Difference]: With dead ends: 550 [2022-01-31 17:03:23,715 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 17:03:23,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5082, Invalid=8724, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:03:23,716 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1168 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:23,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1169 Valid, 50 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 17:03:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 166. [2022-01-31 17:03:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 174 transitions. [2022-01-31 17:03:23,816 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 174 transitions. Word has length 164 [2022-01-31 17:03:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:23,816 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 174 transitions. [2022-01-31 17:03:23,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.316666666666667) internal successors, (139), 58 states have internal predecessors, (139), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 174 transitions. [2022-01-31 17:03:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 17:03:23,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:23,817 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:03:23,817 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2037963074, now seen corresponding path program 56 times [2022-01-31 17:03:23,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875599136] [2022-01-31 17:03:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:23,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:23,819 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:23,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:23,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 17:03:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 17:03:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 17:03:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 17:03:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:24,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:24,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875599136] [2022-01-31 17:03:24,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875599136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:24,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:24,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:03:24,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977124171] [2022-01-31 17:03:24,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:24,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:03:24,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:03:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:03:24,999 INFO L87 Difference]: Start difference. First operand 166 states and 174 transitions. Second operand has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 59 states have internal predecessors, (141), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:30,834 INFO L93 Difference]: Finished difference Result 558 states and 688 transitions. [2022-01-31 17:03:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:03:30,834 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 59 states have internal predecessors, (141), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 166 [2022-01-31 17:03:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:30,836 INFO L225 Difference]: With dead ends: 558 [2022-01-31 17:03:30,836 INFO L226 Difference]: Without dead ends: 511 [2022-01-31 17:03:30,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5258, Invalid=9022, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:03:30,837 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1285 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:30,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 46 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-31 17:03:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 168. [2022-01-31 17:03:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.044871794871795) internal successors, (163), 156 states have internal predecessors, (163), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2022-01-31 17:03:30,925 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 166 [2022-01-31 17:03:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:30,925 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2022-01-31 17:03:30,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3114754098360657) internal successors, (141), 59 states have internal predecessors, (141), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2022-01-31 17:03:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 17:03:30,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:30,927 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:30,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:03:30,927 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 91534560, now seen corresponding path program 57 times [2022-01-31 17:03:30,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248185571] [2022-01-31 17:03:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:30,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:30,929 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:30,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:30,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-01-31 17:03:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 17:03:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 17:03:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 17:03:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:32,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248185571] [2022-01-31 17:03:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248185571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:32,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:32,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:03:32,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708808202] [2022-01-31 17:03:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:32,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:03:32,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:03:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:03:32,231 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 60 states have internal predecessors, (143), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:38,383 INFO L93 Difference]: Finished difference Result 566 states and 698 transitions. [2022-01-31 17:03:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:03:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 60 states have internal predecessors, (143), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 168 [2022-01-31 17:03:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:38,386 INFO L225 Difference]: With dead ends: 566 [2022-01-31 17:03:38,386 INFO L226 Difference]: Without dead ends: 519 [2022-01-31 17:03:38,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5437, Invalid=9325, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:03:38,387 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1340 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:38,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 52 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-31 17:03:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 170. [2022-01-31 17:03:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2022-01-31 17:03:38,485 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 168 [2022-01-31 17:03:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:38,485 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2022-01-31 17:03:38,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 60 states have internal predecessors, (143), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2022-01-31 17:03:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 17:03:38,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:38,486 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:38,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:03:38,486 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2134327938, now seen corresponding path program 58 times [2022-01-31 17:03:38,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869260123] [2022-01-31 17:03:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:38,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:38,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:38,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:38,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-01-31 17:03:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-01-31 17:03:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 17:03:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 17:03:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:39,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869260123] [2022-01-31 17:03:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869260123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:39,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:39,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:03:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289820021] [2022-01-31 17:03:39,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:39,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:03:39,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:03:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:03:39,779 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 61 states have internal predecessors, (145), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:46,133 INFO L93 Difference]: Finished difference Result 574 states and 708 transitions. [2022-01-31 17:03:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:03:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 61 states have internal predecessors, (145), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 170 [2022-01-31 17:03:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:46,135 INFO L225 Difference]: With dead ends: 574 [2022-01-31 17:03:46,135 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 17:03:46,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5619, Invalid=9633, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:03:46,136 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1311 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:46,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 46 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 17:03:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 172. [2022-01-31 17:03:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 160 states have (on average 1.04375) internal successors, (167), 160 states have internal predecessors, (167), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 180 transitions. [2022-01-31 17:03:46,233 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 180 transitions. Word has length 170 [2022-01-31 17:03:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:46,233 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 180 transitions. [2022-01-31 17:03:46,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 61 states have internal predecessors, (145), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 180 transitions. [2022-01-31 17:03:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 17:03:46,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:46,234 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:46,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:03:46,234 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1836257372, now seen corresponding path program 59 times [2022-01-31 17:03:46,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:46,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149649178] [2022-01-31 17:03:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:46,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:46,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:46,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:46,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 17:03:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 17:03:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 17:03:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 17:03:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:47,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:47,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149649178] [2022-01-31 17:03:47,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [149649178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:47,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:47,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:03:47,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724875071] [2022-01-31 17:03:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:03:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:03:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:03:47,520 INFO L87 Difference]: Start difference. First operand 172 states and 180 transitions. Second operand has 64 states, 64 states have (on average 2.296875) internal successors, (147), 62 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:54,119 INFO L93 Difference]: Finished difference Result 582 states and 718 transitions. [2022-01-31 17:03:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:03:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.296875) internal successors, (147), 62 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 172 [2022-01-31 17:03:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:54,121 INFO L225 Difference]: With dead ends: 582 [2022-01-31 17:03:54,121 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 17:03:54,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5804, Invalid=9946, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:03:54,122 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1219 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:54,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 46 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:03:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 17:03:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 174. [2022-01-31 17:03:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.0432098765432098) internal successors, (169), 162 states have internal predecessors, (169), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:03:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 182 transitions. [2022-01-31 17:03:54,228 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 182 transitions. Word has length 172 [2022-01-31 17:03:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:54,229 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 182 transitions. [2022-01-31 17:03:54,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.296875) internal successors, (147), 62 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:03:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 182 transitions. [2022-01-31 17:03:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 17:03:54,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:54,230 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:54,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:03:54,230 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash 657185862, now seen corresponding path program 60 times [2022-01-31 17:03:54,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:54,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567742420] [2022-01-31 17:03:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:54,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:54,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:54,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:54,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 17:03:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-01-31 17:03:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 17:03:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 17:03:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:03:55,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:55,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567742420] [2022-01-31 17:03:55,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567742420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:55,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:55,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:03:55,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738598160] [2022-01-31 17:03:55,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:55,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:03:55,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:55,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:03:55,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:03:55,570 INFO L87 Difference]: Start difference. First operand 174 states and 182 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:02,460 INFO L93 Difference]: Finished difference Result 590 states and 728 transitions. [2022-01-31 17:04:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:04:02,460 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 174 [2022-01-31 17:04:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:02,462 INFO L225 Difference]: With dead ends: 590 [2022-01-31 17:04:02,462 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 17:04:02,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5992, Invalid=10264, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:04:02,463 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1287 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:02,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 48 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:02,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 17:04:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 176. [2022-01-31 17:04:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 164 states have (on average 1.0426829268292683) internal successors, (171), 164 states have internal predecessors, (171), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:04:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2022-01-31 17:04:02,592 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 174 [2022-01-31 17:04:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:02,592 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2022-01-31 17:04:02,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 63 states have internal predecessors, (149), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2022-01-31 17:04:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 17:04:02,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:02,594 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:02,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:04:02,594 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:02,594 INFO L85 PathProgramCache]: Analyzing trace with hash 264382568, now seen corresponding path program 61 times [2022-01-31 17:04:02,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:02,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117678015] [2022-01-31 17:04:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:02,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:02,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:02,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:02,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:03,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-31 17:04:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:03,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-01-31 17:04:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:03,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 17:04:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:03,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 17:04:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:04:03,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:03,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117678015] [2022-01-31 17:04:03,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117678015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:03,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:03,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:04:03,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034942217] [2022-01-31 17:04:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:03,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:04:03,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:04:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:04:03,963 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand has 66 states, 66 states have (on average 2.287878787878788) internal successors, (151), 64 states have internal predecessors, (151), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:11,218 INFO L93 Difference]: Finished difference Result 598 states and 738 transitions. [2022-01-31 17:04:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:04:11,218 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.287878787878788) internal successors, (151), 64 states have internal predecessors, (151), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 176 [2022-01-31 17:04:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:11,220 INFO L225 Difference]: With dead ends: 598 [2022-01-31 17:04:11,220 INFO L226 Difference]: Without dead ends: 551 [2022-01-31 17:04:11,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6183, Invalid=10587, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:04:11,221 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1338 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:11,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 48 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-31 17:04:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 178. [2022-01-31 17:04:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.0421686746987953) internal successors, (173), 166 states have internal predecessors, (173), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:04:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 186 transitions. [2022-01-31 17:04:11,329 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 186 transitions. Word has length 176 [2022-01-31 17:04:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:11,329 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 186 transitions. [2022-01-31 17:04:11,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.287878787878788) internal successors, (151), 64 states have internal predecessors, (151), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 186 transitions. [2022-01-31 17:04:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 17:04:11,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:11,330 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:11,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:04:11,330 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 737539082, now seen corresponding path program 62 times [2022-01-31 17:04:11,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:11,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231382373] [2022-01-31 17:04:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:11,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:11,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:11,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:11,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-01-31 17:04:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-01-31 17:04:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 17:04:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 17:04:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:04:12,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:12,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231382373] [2022-01-31 17:04:12,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [231382373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:12,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:12,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:04:12,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139031407] [2022-01-31 17:04:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:12,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:04:12,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:04:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:04:12,793 INFO L87 Difference]: Start difference. First operand 178 states and 186 transitions. Second operand has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 65 states have internal predecessors, (153), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:20,523 INFO L93 Difference]: Finished difference Result 606 states and 748 transitions. [2022-01-31 17:04:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:04:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 65 states have internal predecessors, (153), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 178 [2022-01-31 17:04:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:20,525 INFO L225 Difference]: With dead ends: 606 [2022-01-31 17:04:20,525 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 17:04:20,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6377, Invalid=10915, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:04:20,526 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1340 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:20,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 44 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 17:04:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 180. [2022-01-31 17:04:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 168 states have internal predecessors, (175), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:04:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 188 transitions. [2022-01-31 17:04:20,646 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 188 transitions. Word has length 178 [2022-01-31 17:04:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:20,646 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 188 transitions. [2022-01-31 17:04:20,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.283582089552239) internal successors, (153), 65 states have internal predecessors, (153), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 188 transitions. [2022-01-31 17:04:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 17:04:20,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:20,647 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:20,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:04:20,647 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash 174415660, now seen corresponding path program 63 times [2022-01-31 17:04:20,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127782982] [2022-01-31 17:04:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:20,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:20,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:20,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:20,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 17:04:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 17:04:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 17:04:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 17:04:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:04:22,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:22,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127782982] [2022-01-31 17:04:22,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127782982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:22,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:22,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:04:22,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89833194] [2022-01-31 17:04:22,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:22,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:04:22,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:22,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:04:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:04:22,147 INFO L87 Difference]: Start difference. First operand 180 states and 188 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 66 states have internal predecessors, (155), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:30,100 INFO L93 Difference]: Finished difference Result 614 states and 758 transitions. [2022-01-31 17:04:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:04:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 66 states have internal predecessors, (155), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 180 [2022-01-31 17:04:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:30,102 INFO L225 Difference]: With dead ends: 614 [2022-01-31 17:04:30,102 INFO L226 Difference]: Without dead ends: 567 [2022-01-31 17:04:30,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6574, Invalid=11248, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:04:30,103 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1416 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:30,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1417 Valid, 46 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-31 17:04:30,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 182. [2022-01-31 17:04:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 170 states have (on average 1.0411764705882354) internal successors, (177), 170 states have internal predecessors, (177), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:04:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 190 transitions. [2022-01-31 17:04:30,227 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 190 transitions. Word has length 180 [2022-01-31 17:04:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:30,227 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 190 transitions. [2022-01-31 17:04:30,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 66 states have internal predecessors, (155), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 190 transitions. [2022-01-31 17:04:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 17:04:30,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:30,229 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:30,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:04:30,229 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 178686414, now seen corresponding path program 64 times [2022-01-31 17:04:30,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:30,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994266679] [2022-01-31 17:04:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:30,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:30,231 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:30,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:30,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:31,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:31,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-01-31 17:04:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 17:04:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:31,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 17:04:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 17:04:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:04:31,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:31,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994266679] [2022-01-31 17:04:31,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994266679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:31,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:31,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:04:31,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421968310] [2022-01-31 17:04:31,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:31,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:04:31,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:04:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:04:31,711 INFO L87 Difference]: Start difference. First operand 182 states and 190 transitions. Second operand has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 67 states have internal predecessors, (157), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:40,047 INFO L93 Difference]: Finished difference Result 622 states and 768 transitions. [2022-01-31 17:04:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:04:40,047 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 67 states have internal predecessors, (157), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 182 [2022-01-31 17:04:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:40,049 INFO L225 Difference]: With dead ends: 622 [2022-01-31 17:04:40,049 INFO L226 Difference]: Without dead ends: 575 [2022-01-31 17:04:40,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6774, Invalid=11586, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:04:40,050 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1344 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:40,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 48 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-31 17:04:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 184. [2022-01-31 17:04:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 172 states have internal predecessors, (179), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:04:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2022-01-31 17:04:40,206 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 182 [2022-01-31 17:04:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:40,207 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2022-01-31 17:04:40,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 67 states have internal predecessors, (157), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2022-01-31 17:04:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 17:04:40,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:40,208 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:40,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:04:40,208 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash -12086288, now seen corresponding path program 65 times [2022-01-31 17:04:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747837465] [2022-01-31 17:04:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:40,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:40,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:40,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:40,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-01-31 17:04:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 17:04:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 17:04:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 17:04:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:04:41,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747837465] [2022-01-31 17:04:41,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747837465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:41,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:41,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:04:41,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513294817] [2022-01-31 17:04:41,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:41,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:04:41,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:04:41,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:04:41,730 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 68 states have internal predecessors, (159), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:50,476 INFO L93 Difference]: Finished difference Result 630 states and 778 transitions. [2022-01-31 17:04:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:04:50,476 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 68 states have internal predecessors, (159), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 184 [2022-01-31 17:04:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:50,478 INFO L225 Difference]: With dead ends: 630 [2022-01-31 17:04:50,478 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 17:04:50,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6977, Invalid=11929, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:04:50,480 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1512 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:50,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 48 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:04:50,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 17:04:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2022-01-31 17:04:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 states have internal predecessors, (181), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:04:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2022-01-31 17:04:50,610 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 184 [2022-01-31 17:04:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:50,611 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2022-01-31 17:04:50,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 68 states have internal predecessors, (159), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:04:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2022-01-31 17:04:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 17:04:50,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:50,611 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:50,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:04:50,612 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1338940818, now seen corresponding path program 66 times [2022-01-31 17:04:50,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:50,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786124544] [2022-01-31 17:04:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:50,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:50,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:50,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:50,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-01-31 17:04:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-01-31 17:04:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 17:04:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 17:04:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:04:52,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786124544] [2022-01-31 17:04:52,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [786124544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:52,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:52,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:04:52,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380734192] [2022-01-31 17:04:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:52,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:04:52,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:52,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:04:52,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:04:52,166 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 69 states have internal predecessors, (161), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:01,215 INFO L93 Difference]: Finished difference Result 638 states and 788 transitions. [2022-01-31 17:05:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:05:01,216 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 69 states have internal predecessors, (161), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 186 [2022-01-31 17:05:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:01,217 INFO L225 Difference]: With dead ends: 638 [2022-01-31 17:05:01,217 INFO L226 Difference]: Without dead ends: 591 [2022-01-31 17:05:01,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7183, Invalid=12277, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:05:01,219 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1517 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:01,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1518 Valid, 50 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:05:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-31 17:05:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 188. [2022-01-31 17:05:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 176 states have internal predecessors, (183), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:05:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 196 transitions. [2022-01-31 17:05:01,382 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 196 transitions. Word has length 186 [2022-01-31 17:05:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:01,382 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 196 transitions. [2022-01-31 17:05:01,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 69 states have internal predecessors, (161), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 196 transitions. [2022-01-31 17:05:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 17:05:01,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:01,383 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:01,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:05:01,383 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1699101004, now seen corresponding path program 67 times [2022-01-31 17:05:01,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:01,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880365322] [2022-01-31 17:05:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:01,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:01,385 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:01,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:01,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 17:05:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 17:05:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 17:05:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 17:05:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:05:02,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880365322] [2022-01-31 17:05:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880365322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:02,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:02,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:05:02,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718526045] [2022-01-31 17:05:02,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:05:02,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:05:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:05:02,993 INFO L87 Difference]: Start difference. First operand 188 states and 196 transitions. Second operand has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 70 states have internal predecessors, (163), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:12,578 INFO L93 Difference]: Finished difference Result 646 states and 798 transitions. [2022-01-31 17:05:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:05:12,578 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 70 states have internal predecessors, (163), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 188 [2022-01-31 17:05:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:12,580 INFO L225 Difference]: With dead ends: 646 [2022-01-31 17:05:12,580 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 17:05:12,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7392, Invalid=12630, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:05:12,582 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1469 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:12,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1470 Valid, 52 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:05:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 17:05:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 190. [2022-01-31 17:05:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 178 states have (on average 1.0393258426966292) internal successors, (185), 178 states have internal predecessors, (185), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:05:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 198 transitions. [2022-01-31 17:05:12,714 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 198 transitions. Word has length 188 [2022-01-31 17:05:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:12,715 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 198 transitions. [2022-01-31 17:05:12,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.263888888888889) internal successors, (163), 70 states have internal predecessors, (163), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 198 transitions. [2022-01-31 17:05:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 17:05:12,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:12,716 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:12,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:05:12,716 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash -679530666, now seen corresponding path program 68 times [2022-01-31 17:05:12,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:12,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259473186] [2022-01-31 17:05:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:12,718 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:12,718 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:12,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:12,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:14,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:14,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-31 17:05:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:14,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-01-31 17:05:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:14,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 17:05:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:14,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 17:05:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:05:14,547 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259473186] [2022-01-31 17:05:14,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [259473186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:14,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:14,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:05:14,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965722505] [2022-01-31 17:05:14,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:14,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:05:14,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:05:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:05:14,550 INFO L87 Difference]: Start difference. First operand 190 states and 198 transitions. Second operand has 73 states, 73 states have (on average 2.26027397260274) internal successors, (165), 71 states have internal predecessors, (165), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:24,420 INFO L93 Difference]: Finished difference Result 654 states and 808 transitions. [2022-01-31 17:05:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:05:24,420 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.26027397260274) internal successors, (165), 71 states have internal predecessors, (165), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 190 [2022-01-31 17:05:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:24,423 INFO L225 Difference]: With dead ends: 654 [2022-01-31 17:05:24,423 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 17:05:24,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7604, Invalid=12988, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 17:05:24,424 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1265 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:24,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 52 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:05:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 17:05:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 192. [2022-01-31 17:05:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 180 states have (on average 1.038888888888889) internal successors, (187), 180 states have internal predecessors, (187), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:05:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2022-01-31 17:05:24,560 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 190 [2022-01-31 17:05:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:24,560 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2022-01-31 17:05:24,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.26027397260274) internal successors, (165), 71 states have internal predecessors, (165), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2022-01-31 17:05:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 17:05:24,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:24,561 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:24,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:05:24,561 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -124979336, now seen corresponding path program 69 times [2022-01-31 17:05:24,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:24,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693533086] [2022-01-31 17:05:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:24,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:24,563 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:24,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:24,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:26,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:26,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 17:05:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-01-31 17:05:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 17:05:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:26,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 17:05:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:05:26,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:26,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693533086] [2022-01-31 17:05:26,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [693533086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:26,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:26,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:05:26,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622592800] [2022-01-31 17:05:26,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:26,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:05:26,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:05:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:05:26,270 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand has 74 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 72 states have internal predecessors, (167), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:36,471 INFO L93 Difference]: Finished difference Result 662 states and 818 transitions. [2022-01-31 17:05:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:05:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 72 states have internal predecessors, (167), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 192 [2022-01-31 17:05:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:36,474 INFO L225 Difference]: With dead ends: 662 [2022-01-31 17:05:36,474 INFO L226 Difference]: Without dead ends: 615 [2022-01-31 17:05:36,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7819, Invalid=13351, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 17:05:36,476 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1349 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:36,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 54 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:05:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-31 17:05:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 194. [2022-01-31 17:05:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 182 states have (on average 1.0384615384615385) internal successors, (189), 182 states have internal predecessors, (189), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:05:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 202 transitions. [2022-01-31 17:05:36,625 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 202 transitions. Word has length 192 [2022-01-31 17:05:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:36,626 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 202 transitions. [2022-01-31 17:05:36,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 72 states have internal predecessors, (167), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 202 transitions. [2022-01-31 17:05:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 17:05:36,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:36,627 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:36,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:05:36,627 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash 222904090, now seen corresponding path program 70 times [2022-01-31 17:05:36,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:36,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591621851] [2022-01-31 17:05:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:36,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:36,629 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:36,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:36,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:38,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:38,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-01-31 17:05:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:38,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-01-31 17:05:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:38,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 17:05:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:38,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 17:05:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:05:38,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:38,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591621851] [2022-01-31 17:05:38,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591621851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:38,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:38,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:05:38,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6219224] [2022-01-31 17:05:38,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:38,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:05:38,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:05:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:05:38,373 INFO L87 Difference]: Start difference. First operand 194 states and 202 transitions. Second operand has 75 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 73 states have internal predecessors, (169), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:49,169 INFO L93 Difference]: Finished difference Result 670 states and 828 transitions. [2022-01-31 17:05:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:05:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 73 states have internal predecessors, (169), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 194 [2022-01-31 17:05:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:49,171 INFO L225 Difference]: With dead ends: 670 [2022-01-31 17:05:49,171 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 17:05:49,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8037, Invalid=13719, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 17:05:49,172 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1492 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 898 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 898 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:49,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 52 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [898 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:05:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 17:05:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 196. [2022-01-31 17:05:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 184 states have (on average 1.0380434782608696) internal successors, (191), 184 states have internal predecessors, (191), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:05:49,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 204 transitions. [2022-01-31 17:05:49,387 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 204 transitions. Word has length 194 [2022-01-31 17:05:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:49,387 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 204 transitions. [2022-01-31 17:05:49,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 73 states have internal predecessors, (169), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:05:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 204 transitions. [2022-01-31 17:05:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 17:05:49,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:49,389 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:49,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:05:49,389 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash -468572612, now seen corresponding path program 71 times [2022-01-31 17:05:49,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:49,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596029310] [2022-01-31 17:05:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:49,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:49,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:49,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:49,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 17:05:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 17:05:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 17:05:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 17:05:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:05:51,173 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596029310] [2022-01-31 17:05:51,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596029310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:51,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:51,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:05:51,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712361403] [2022-01-31 17:05:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:51,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:05:51,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:05:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:05:51,175 INFO L87 Difference]: Start difference. First operand 196 states and 204 transitions. Second operand has 76 states, 76 states have (on average 2.25) internal successors, (171), 74 states have internal predecessors, (171), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:02,305 INFO L93 Difference]: Finished difference Result 678 states and 838 transitions. [2022-01-31 17:06:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:06:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.25) internal successors, (171), 74 states have internal predecessors, (171), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 196 [2022-01-31 17:06:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:02,307 INFO L225 Difference]: With dead ends: 678 [2022-01-31 17:06:02,307 INFO L226 Difference]: Without dead ends: 631 [2022-01-31 17:06:02,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8258, Invalid=14092, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 17:06:02,309 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1627 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:02,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 50 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:06:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-31 17:06:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 198. [2022-01-31 17:06:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 186 states have internal predecessors, (193), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:06:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 206 transitions. [2022-01-31 17:06:02,454 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 206 transitions. Word has length 196 [2022-01-31 17:06:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 206 transitions. [2022-01-31 17:06:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.25) internal successors, (171), 74 states have internal predecessors, (171), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 206 transitions. [2022-01-31 17:06:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 17:06:02,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:02,455 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:02,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:06:02,455 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 742247646, now seen corresponding path program 72 times [2022-01-31 17:06:02,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:02,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602381108] [2022-01-31 17:06:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:02,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:02,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:02,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:02,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-01-31 17:06:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-01-31 17:06:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 17:06:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 17:06:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:06:04,273 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:04,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602381108] [2022-01-31 17:06:04,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602381108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:04,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:04,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:06:04,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546795914] [2022-01-31 17:06:04,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:04,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:06:04,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:04,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:06:04,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:06:04,275 INFO L87 Difference]: Start difference. First operand 198 states and 206 transitions. Second operand has 77 states, 77 states have (on average 2.2467532467532467) internal successors, (173), 75 states have internal predecessors, (173), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:15,721 INFO L93 Difference]: Finished difference Result 686 states and 848 transitions. [2022-01-31 17:06:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:06:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2467532467532467) internal successors, (173), 75 states have internal predecessors, (173), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 198 [2022-01-31 17:06:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:15,724 INFO L225 Difference]: With dead ends: 686 [2022-01-31 17:06:15,724 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 17:06:15,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8482, Invalid=14470, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 17:06:15,726 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1553 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 957 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 957 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:15,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 48 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [957 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:06:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 17:06:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 200. [2022-01-31 17:06:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 188 states have internal predecessors, (195), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:06:15,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2022-01-31 17:06:15,879 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 198 [2022-01-31 17:06:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:15,879 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2022-01-31 17:06:15,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2467532467532467) internal successors, (173), 75 states have internal predecessors, (173), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:15,879 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2022-01-31 17:06:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 17:06:15,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:15,880 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:15,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:06:15,880 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:15,880 INFO L85 PathProgramCache]: Analyzing trace with hash 404378368, now seen corresponding path program 73 times [2022-01-31 17:06:15,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596705172] [2022-01-31 17:06:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:15,882 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:15,882 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:15,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:15,885 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:17,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-01-31 17:06:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:17,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-31 17:06:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:17,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 17:06:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 17:06:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:06:17,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596705172] [2022-01-31 17:06:17,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [596705172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:17,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:17,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:06:17,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394060178] [2022-01-31 17:06:17,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:17,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:06:17,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:06:17,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:06:17,735 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand has 78 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 76 states have internal predecessors, (175), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:29,621 INFO L93 Difference]: Finished difference Result 694 states and 858 transitions. [2022-01-31 17:06:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:06:29,622 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 76 states have internal predecessors, (175), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 200 [2022-01-31 17:06:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:29,624 INFO L225 Difference]: With dead ends: 694 [2022-01-31 17:06:29,624 INFO L226 Difference]: Without dead ends: 647 [2022-01-31 17:06:29,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8709, Invalid=14853, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 17:06:29,625 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1677 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:29,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 44 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:06:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-31 17:06:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 202. [2022-01-31 17:06:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 190 states have (on average 1.0368421052631578) internal successors, (197), 190 states have internal predecessors, (197), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:06:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 210 transitions. [2022-01-31 17:06:29,855 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 210 transitions. Word has length 200 [2022-01-31 17:06:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:29,855 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 210 transitions. [2022-01-31 17:06:29,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.2435897435897436) internal successors, (175), 76 states have internal predecessors, (175), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 210 transitions. [2022-01-31 17:06:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 17:06:29,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:29,856 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:29,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:06:29,856 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:29,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2129516706, now seen corresponding path program 74 times [2022-01-31 17:06:29,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:29,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93757056] [2022-01-31 17:06:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:29,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:29,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:29,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:29,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-01-31 17:06:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-01-31 17:06:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 17:06:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 17:06:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:06:31,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93757056] [2022-01-31 17:06:31,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [93757056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:31,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:31,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:06:31,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107816511] [2022-01-31 17:06:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:31,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:06:31,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:06:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:06:31,798 INFO L87 Difference]: Start difference. First operand 202 states and 210 transitions. Second operand has 79 states, 79 states have (on average 2.240506329113924) internal successors, (177), 77 states have internal predecessors, (177), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:44,580 INFO L93 Difference]: Finished difference Result 702 states and 868 transitions. [2022-01-31 17:06:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:06:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.240506329113924) internal successors, (177), 77 states have internal predecessors, (177), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 202 [2022-01-31 17:06:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:44,582 INFO L225 Difference]: With dead ends: 702 [2022-01-31 17:06:44,582 INFO L226 Difference]: Without dead ends: 655 [2022-01-31 17:06:44,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8939, Invalid=15241, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 17:06:44,584 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1671 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 1013 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1013 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:44,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1672 Valid, 46 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1013 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:06:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-31 17:06:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 204. [2022-01-31 17:06:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 192 states have internal predecessors, (199), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:06:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 212 transitions. [2022-01-31 17:06:44,744 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 212 transitions. Word has length 202 [2022-01-31 17:06:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:44,745 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 212 transitions. [2022-01-31 17:06:44,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.240506329113924) internal successors, (177), 77 states have internal predecessors, (177), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 212 transitions. [2022-01-31 17:06:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 17:06:44,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:44,746 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:44,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:06:44,746 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2130083268, now seen corresponding path program 75 times [2022-01-31 17:06:44,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:44,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901236660] [2022-01-31 17:06:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:44,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:44,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:44,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:44,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:46,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:46,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 17:06:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:46,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 17:06:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:46,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 17:06:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 17:06:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:06:46,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901236660] [2022-01-31 17:06:46,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901236660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:46,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:46,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:06:46,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106534928] [2022-01-31 17:06:46,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:46,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:06:46,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:46,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:06:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:06:46,724 INFO L87 Difference]: Start difference. First operand 204 states and 212 transitions. Second operand has 80 states, 80 states have (on average 2.2375) internal successors, (179), 78 states have internal predecessors, (179), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:06:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:59,835 INFO L93 Difference]: Finished difference Result 710 states and 878 transitions. [2022-01-31 17:06:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:06:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2375) internal successors, (179), 78 states have internal predecessors, (179), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 204 [2022-01-31 17:06:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:59,838 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:06:59,838 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 17:06:59,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9172, Invalid=15634, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 17:06:59,839 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1628 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:59,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1629 Valid, 46 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:06:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 17:07:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 206. [2022-01-31 17:07:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 194 states have (on average 1.0360824742268042) internal successors, (201), 194 states have internal predecessors, (201), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:07:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 214 transitions. [2022-01-31 17:07:00,084 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 214 transitions. Word has length 204 [2022-01-31 17:07:00,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:00,084 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 214 transitions. [2022-01-31 17:07:00,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2375) internal successors, (179), 78 states have internal predecessors, (179), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 214 transitions. [2022-01-31 17:07:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 17:07:00,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:00,085 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:00,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:07:00,085 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:00,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1620417946, now seen corresponding path program 76 times [2022-01-31 17:07:00,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:00,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974598823] [2022-01-31 17:07:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:00,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:00,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:00,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:00,092 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:02,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:02,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-01-31 17:07:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:02,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-01-31 17:07:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:02,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 17:07:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:02,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 17:07:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:07:02,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974598823] [2022-01-31 17:07:02,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [974598823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:02,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:02,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:07:02,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311035006] [2022-01-31 17:07:02,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:02,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:07:02,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:07:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:07:02,123 INFO L87 Difference]: Start difference. First operand 206 states and 214 transitions. Second operand has 81 states, 81 states have (on average 2.234567901234568) internal successors, (181), 79 states have internal predecessors, (181), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:15,913 INFO L93 Difference]: Finished difference Result 718 states and 888 transitions. [2022-01-31 17:07:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:07:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.234567901234568) internal successors, (181), 79 states have internal predecessors, (181), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 206 [2022-01-31 17:07:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:15,915 INFO L225 Difference]: With dead ends: 718 [2022-01-31 17:07:15,915 INFO L226 Difference]: Without dead ends: 671 [2022-01-31 17:07:15,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9408, Invalid=16032, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 17:07:15,917 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1866 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1867 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:15,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1867 Valid, 44 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:07:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-31 17:07:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 208. [2022-01-31 17:07:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 196 states have internal predecessors, (203), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:07:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 216 transitions. [2022-01-31 17:07:16,089 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 216 transitions. Word has length 206 [2022-01-31 17:07:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:16,089 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 216 transitions. [2022-01-31 17:07:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.234567901234568) internal successors, (181), 79 states have internal predecessors, (181), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 216 transitions. [2022-01-31 17:07:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 17:07:16,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:16,090 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:07:16,091 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1920444040, now seen corresponding path program 77 times [2022-01-31 17:07:16,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:16,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789325805] [2022-01-31 17:07:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:16,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:16,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:16,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:16,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:18,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:18,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-01-31 17:07:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:18,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 17:07:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:18,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 17:07:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 17:07:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:07:18,168 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:18,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789325805] [2022-01-31 17:07:18,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [789325805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:18,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:18,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:07:18,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943125907] [2022-01-31 17:07:18,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:18,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:07:18,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:07:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:07:18,170 INFO L87 Difference]: Start difference. First operand 208 states and 216 transitions. Second operand has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 80 states have internal predecessors, (183), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:32,417 INFO L93 Difference]: Finished difference Result 726 states and 898 transitions. [2022-01-31 17:07:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:07:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 80 states have internal predecessors, (183), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 208 [2022-01-31 17:07:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:32,419 INFO L225 Difference]: With dead ends: 726 [2022-01-31 17:07:32,419 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 17:07:32,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3313 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9647, Invalid=16435, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 17:07:32,421 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1648 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 1030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:32,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 48 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1030 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:07:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 17:07:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 210. [2022-01-31 17:07:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 198 states have (on average 1.0353535353535352) internal successors, (205), 198 states have internal predecessors, (205), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:07:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 218 transitions. [2022-01-31 17:07:32,599 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 218 transitions. Word has length 208 [2022-01-31 17:07:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:32,599 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 218 transitions. [2022-01-31 17:07:32,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.231707317073171) internal successors, (183), 80 states have internal predecessors, (183), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 218 transitions. [2022-01-31 17:07:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 17:07:32,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:32,600 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:32,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:07:32,600 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:32,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1220253142, now seen corresponding path program 78 times [2022-01-31 17:07:32,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:32,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734500663] [2022-01-31 17:07:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:32,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:32,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:32,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:32,606 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:34,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-01-31 17:07:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:34,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-01-31 17:07:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:34,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 17:07:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:34,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 17:07:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:07:34,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:34,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734500663] [2022-01-31 17:07:34,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734500663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:34,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:34,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:07:34,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833324639] [2022-01-31 17:07:34,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:34,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:07:34,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:07:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:07:34,712 INFO L87 Difference]: Start difference. First operand 210 states and 218 transitions. Second operand has 83 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 81 states have internal predecessors, (185), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:49,499 INFO L93 Difference]: Finished difference Result 734 states and 908 transitions. [2022-01-31 17:07:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:07:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 81 states have internal predecessors, (185), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 210 [2022-01-31 17:07:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:49,501 INFO L225 Difference]: With dead ends: 734 [2022-01-31 17:07:49,501 INFO L226 Difference]: Without dead ends: 687 [2022-01-31 17:07:49,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3395 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9889, Invalid=16843, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 17:07:49,502 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1556 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:49,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 50 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:07:49,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-31 17:07:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 212. [2022-01-31 17:07:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 200 states have (on average 1.035) internal successors, (207), 200 states have internal predecessors, (207), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:07:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 220 transitions. [2022-01-31 17:07:49,690 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 220 transitions. Word has length 210 [2022-01-31 17:07:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 220 transitions. [2022-01-31 17:07:49,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.2289156626506026) internal successors, (185), 81 states have internal predecessors, (185), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:07:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 220 transitions. [2022-01-31 17:07:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 17:07:49,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:49,691 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:07:49,691 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:49,691 INFO L85 PathProgramCache]: Analyzing trace with hash -68235956, now seen corresponding path program 79 times [2022-01-31 17:07:49,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:49,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075367441] [2022-01-31 17:07:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:49,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:49,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:49,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:49,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:51,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 17:07:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:51,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 17:07:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:51,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 17:07:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:51,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 17:07:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:07:51,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:51,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075367441] [2022-01-31 17:07:51,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075367441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:51,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:51,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:07:51,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914499098] [2022-01-31 17:07:51,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:51,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:07:51,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:07:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:07:51,850 INFO L87 Difference]: Start difference. First operand 212 states and 220 transitions. Second operand has 84 states, 84 states have (on average 2.2261904761904763) internal successors, (187), 82 states have internal predecessors, (187), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:08:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:07,266 INFO L93 Difference]: Finished difference Result 742 states and 918 transitions. [2022-01-31 17:08:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:08:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2261904761904763) internal successors, (187), 82 states have internal predecessors, (187), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 212 [2022-01-31 17:08:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:07,268 INFO L225 Difference]: With dead ends: 742 [2022-01-31 17:08:07,268 INFO L226 Difference]: Without dead ends: 695 [2022-01-31 17:08:07,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3478 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10134, Invalid=17256, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 17:08:07,269 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1478 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:07,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 50 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:08:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-31 17:08:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 214. [2022-01-31 17:08:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 202 states have (on average 1.0346534653465347) internal successors, (209), 202 states have internal predecessors, (209), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:08:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 222 transitions. [2022-01-31 17:08:07,457 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 222 transitions. Word has length 212 [2022-01-31 17:08:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:07,457 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 222 transitions. [2022-01-31 17:08:07,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2261904761904763) internal successors, (187), 82 states have internal predecessors, (187), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:08:07,457 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 222 transitions. [2022-01-31 17:08:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 17:08:07,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:07,458 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:07,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:08:07,458 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:07,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1081282578, now seen corresponding path program 80 times [2022-01-31 17:08:07,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:07,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644662391] [2022-01-31 17:08:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:07,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:07,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:07,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:07,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-01-31 17:08:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-01-31 17:08:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 17:08:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 17:08:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:08:09,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:09,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644662391] [2022-01-31 17:08:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [644662391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:09,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:09,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:08:09,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686371010] [2022-01-31 17:08:09,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:09,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:08:09,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:08:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:08:09,653 INFO L87 Difference]: Start difference. First operand 214 states and 222 transitions. Second operand has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 83 states have internal predecessors, (189), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:08:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:25,748 INFO L93 Difference]: Finished difference Result 750 states and 928 transitions. [2022-01-31 17:08:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:08:25,748 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 83 states have internal predecessors, (189), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 214 [2022-01-31 17:08:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:25,749 INFO L225 Difference]: With dead ends: 750 [2022-01-31 17:08:25,749 INFO L226 Difference]: Without dead ends: 703 [2022-01-31 17:08:25,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10382, Invalid=17674, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 17:08:25,751 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1861 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 1145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:25,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1862 Valid, 42 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1145 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:08:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-31 17:08:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 216. [2022-01-31 17:08:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 204 states have (on average 1.0343137254901962) internal successors, (211), 204 states have internal predecessors, (211), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:08:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2022-01-31 17:08:25,947 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 214 [2022-01-31 17:08:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:25,947 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2022-01-31 17:08:25,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.223529411764706) internal successors, (189), 83 states have internal predecessors, (189), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:08:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2022-01-31 17:08:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 17:08:25,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:25,949 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:25,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:08:25,949 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash 338489872, now seen corresponding path program 81 times [2022-01-31 17:08:25,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:25,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990456404] [2022-01-31 17:08:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:25,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:25,951 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:25,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:25,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:28,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 17:08:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:28,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-01-31 17:08:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:28,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 17:08:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:28,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 17:08:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:08:28,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990456404] [2022-01-31 17:08:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990456404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:28,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:08:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683448252] [2022-01-31 17:08:28,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:28,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:08:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:08:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:08:28,305 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand has 86 states, 86 states have (on average 2.2209302325581395) internal successors, (191), 84 states have internal predecessors, (191), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:08:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:45,216 INFO L93 Difference]: Finished difference Result 758 states and 938 transitions. [2022-01-31 17:08:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:08:45,217 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2209302325581395) internal successors, (191), 84 states have internal predecessors, (191), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 216 [2022-01-31 17:08:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:45,218 INFO L225 Difference]: With dead ends: 758 [2022-01-31 17:08:45,218 INFO L226 Difference]: Without dead ends: 711 [2022-01-31 17:08:45,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3647 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10633, Invalid=18097, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 17:08:45,220 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1658 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 1018 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:45,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 50 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1018 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:08:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-01-31 17:08:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 218. [2022-01-31 17:08:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 206 states have (on average 1.0339805825242718) internal successors, (213), 206 states have internal predecessors, (213), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:08:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 226 transitions. [2022-01-31 17:08:45,425 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 226 transitions. Word has length 216 [2022-01-31 17:08:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:45,425 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 226 transitions. [2022-01-31 17:08:45,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2209302325581395) internal successors, (191), 84 states have internal predecessors, (191), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:08:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 226 transitions. [2022-01-31 17:08:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 17:08:45,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:45,426 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:45,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:08:45,426 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:45,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1059785806, now seen corresponding path program 82 times [2022-01-31 17:08:45,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:45,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493757293] [2022-01-31 17:08:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:45,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:45,428 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:45,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:45,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:47,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:47,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-01-31 17:08:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:47,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-01-31 17:08:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 17:08:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:47,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 17:08:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:08:47,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:47,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493757293] [2022-01-31 17:08:47,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493757293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:47,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:47,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:08:47,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756032617] [2022-01-31 17:08:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:47,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:08:47,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:47,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:08:47,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:08:47,726 INFO L87 Difference]: Start difference. First operand 218 states and 226 transitions. Second operand has 87 states, 87 states have (on average 2.218390804597701) internal successors, (193), 85 states have internal predecessors, (193), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:09:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:04,873 INFO L93 Difference]: Finished difference Result 766 states and 948 transitions. [2022-01-31 17:09:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:09:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.218390804597701) internal successors, (193), 85 states have internal predecessors, (193), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 218 [2022-01-31 17:09:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:04,874 INFO L225 Difference]: With dead ends: 766 [2022-01-31 17:09:04,874 INFO L226 Difference]: Without dead ends: 719 [2022-01-31 17:09:04,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10887, Invalid=18525, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 17:09:04,876 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1752 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:04,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 44 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:09:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-31 17:09:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 220. [2022-01-31 17:09:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 208 states have internal predecessors, (215), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:09:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 228 transitions. [2022-01-31 17:09:05,079 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 228 transitions. Word has length 218 [2022-01-31 17:09:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:05,079 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 228 transitions. [2022-01-31 17:09:05,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.218390804597701) internal successors, (193), 85 states have internal predecessors, (193), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:09:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 228 transitions. [2022-01-31 17:09:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 17:09:05,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:05,080 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:05,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:09:05,080 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash -477948716, now seen corresponding path program 83 times [2022-01-31 17:09:05,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:05,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652905303] [2022-01-31 17:09:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:05,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:05,082 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:05,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:05,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:07,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:07,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 17:09:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:07,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-01-31 17:09:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:07,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 17:09:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:07,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 17:09:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:09:07,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652905303] [2022-01-31 17:09:07,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [652905303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:07,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:07,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:09:07,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473839599] [2022-01-31 17:09:07,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:07,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:09:07,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:09:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:09:07,477 INFO L87 Difference]: Start difference. First operand 220 states and 228 transitions. Second operand has 88 states, 88 states have (on average 2.215909090909091) internal successors, (195), 86 states have internal predecessors, (195), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:09:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:25,413 INFO L93 Difference]: Finished difference Result 774 states and 958 transitions. [2022-01-31 17:09:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:09:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.215909090909091) internal successors, (195), 86 states have internal predecessors, (195), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 220 [2022-01-31 17:09:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:25,414 INFO L225 Difference]: With dead ends: 774 [2022-01-31 17:09:25,414 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 17:09:25,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11144, Invalid=18958, Unknown=0, NotChecked=0, Total=30102 [2022-01-31 17:09:25,416 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1853 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 1134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1854 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:25,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1854 Valid, 52 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:09:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 17:09:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 222. [2022-01-31 17:09:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 210 states have (on average 1.0333333333333334) internal successors, (217), 210 states have internal predecessors, (217), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:09:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 230 transitions. [2022-01-31 17:09:25,622 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 230 transitions. Word has length 220 [2022-01-31 17:09:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:25,622 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 230 transitions. [2022-01-31 17:09:25,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.215909090909091) internal successors, (195), 86 states have internal predecessors, (195), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:09:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 230 transitions. [2022-01-31 17:09:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 17:09:25,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:25,623 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:25,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:09:25,623 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 321746294, now seen corresponding path program 84 times [2022-01-31 17:09:25,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:25,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486259574] [2022-01-31 17:09:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:25,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:25,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:25,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:25,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:28,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:28,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-01-31 17:09:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-01-31 17:09:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:28,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 17:09:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:28,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 17:09:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:09:28,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:28,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486259574] [2022-01-31 17:09:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [486259574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:28,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:28,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:09:28,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229164248] [2022-01-31 17:09:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:28,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:09:28,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:09:28,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:09:28,041 INFO L87 Difference]: Start difference. First operand 222 states and 230 transitions. Second operand has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 87 states have internal predecessors, (197), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:09:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:46,441 INFO L93 Difference]: Finished difference Result 782 states and 968 transitions. [2022-01-31 17:09:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:09:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 87 states have internal predecessors, (197), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 222 [2022-01-31 17:09:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:46,442 INFO L225 Difference]: With dead ends: 782 [2022-01-31 17:09:46,442 INFO L226 Difference]: Without dead ends: 735 [2022-01-31 17:09:46,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11404, Invalid=19396, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 17:09:46,444 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1737 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:46,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1738 Valid, 52 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:09:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-31 17:09:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 224. [2022-01-31 17:09:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.0330188679245282) internal successors, (219), 212 states have internal predecessors, (219), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:09:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2022-01-31 17:09:46,655 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 222 [2022-01-31 17:09:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:46,655 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2022-01-31 17:09:46,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 87 states have internal predecessors, (197), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:09:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2022-01-31 17:09:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 17:09:46,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:46,656 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:46,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:09:46,656 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 29504920, now seen corresponding path program 85 times [2022-01-31 17:09:46,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012212345] [2022-01-31 17:09:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:46,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:46,657 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:46,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:46,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:49,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:49,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-01-31 17:09:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:49,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-01-31 17:09:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 17:09:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 17:09:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:09:49,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:49,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012212345] [2022-01-31 17:09:49,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012212345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:49,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:49,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:09:49,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983701825] [2022-01-31 17:09:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:49,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:09:49,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:09:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:09:49,113 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand has 90 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 88 states have internal predecessors, (199), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:10:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:08,019 INFO L93 Difference]: Finished difference Result 790 states and 978 transitions. [2022-01-31 17:10:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:10:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 88 states have internal predecessors, (199), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 224 [2022-01-31 17:10:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:08,021 INFO L225 Difference]: With dead ends: 790 [2022-01-31 17:10:08,021 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 17:10:08,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3997 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=11667, Invalid=19839, Unknown=0, NotChecked=0, Total=31506 [2022-01-31 17:10:08,023 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1874 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:08,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1875 Valid, 44 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1158 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:10:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 17:10:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 226. [2022-01-31 17:10:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 214 states have (on average 1.0327102803738317) internal successors, (221), 214 states have internal predecessors, (221), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:10:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 234 transitions. [2022-01-31 17:10:08,257 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 234 transitions. Word has length 224 [2022-01-31 17:10:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:08,257 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 234 transitions. [2022-01-31 17:10:08,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 88 states have internal predecessors, (199), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:10:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 234 transitions. [2022-01-31 17:10:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 17:10:08,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:08,259 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:08,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:10:08,259 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1641581254, now seen corresponding path program 86 times [2022-01-31 17:10:08,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:08,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408034465] [2022-01-31 17:10:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:08,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:08,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:08,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:08,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-01-31 17:10:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-01-31 17:10:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 17:10:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 17:10:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:10:10,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408034465] [2022-01-31 17:10:10,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408034465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:10,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:10,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:10:10,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829580853] [2022-01-31 17:10:10,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:10,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:10:10,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:10:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:10:10,766 INFO L87 Difference]: Start difference. First operand 226 states and 234 transitions. Second operand has 91 states, 91 states have (on average 2.208791208791209) internal successors, (201), 89 states have internal predecessors, (201), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:10:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:30,487 INFO L93 Difference]: Finished difference Result 798 states and 988 transitions. [2022-01-31 17:10:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:10:30,488 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.208791208791209) internal successors, (201), 89 states have internal predecessors, (201), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 226 [2022-01-31 17:10:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:30,489 INFO L225 Difference]: With dead ends: 798 [2022-01-31 17:10:30,489 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 17:10:30,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=11933, Invalid=20287, Unknown=0, NotChecked=0, Total=32220 [2022-01-31 17:10:30,491 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1916 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 1186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:30,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1917 Valid, 46 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1186 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:10:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 17:10:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 228. [2022-01-31 17:10:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 216 states have (on average 1.0324074074074074) internal successors, (223), 216 states have internal predecessors, (223), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:10:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 236 transitions. [2022-01-31 17:10:30,721 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 236 transitions. Word has length 226 [2022-01-31 17:10:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:30,722 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 236 transitions. [2022-01-31 17:10:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.208791208791209) internal successors, (201), 89 states have internal predecessors, (201), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:10:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 236 transitions. [2022-01-31 17:10:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 17:10:30,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:30,722 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:30,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:10:30,723 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1237625764, now seen corresponding path program 87 times [2022-01-31 17:10:30,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:30,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486970305] [2022-01-31 17:10:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:30,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:30,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:30,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:30,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:33,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:33,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-01-31 17:10:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-01-31 17:10:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:33,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 17:10:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:33,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-01-31 17:10:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:10:33,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486970305] [2022-01-31 17:10:33,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486970305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:33,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:33,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:10:33,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697824159] [2022-01-31 17:10:33,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:33,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:10:33,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:10:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:10:33,268 INFO L87 Difference]: Start difference. First operand 228 states and 236 transitions. Second operand has 92 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 90 states have internal predecessors, (203), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:10:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:53,615 INFO L93 Difference]: Finished difference Result 806 states and 998 transitions. [2022-01-31 17:10:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:10:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 90 states have internal predecessors, (203), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 228 [2022-01-31 17:10:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:53,616 INFO L225 Difference]: With dead ends: 806 [2022-01-31 17:10:53,616 INFO L226 Difference]: Without dead ends: 759 [2022-01-31 17:10:53,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12202, Invalid=20740, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 17:10:53,618 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1865 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:53,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1866 Valid, 52 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:10:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-31 17:10:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 230. [2022-01-31 17:10:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.0321100917431192) internal successors, (225), 218 states have internal predecessors, (225), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:10:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 238 transitions. [2022-01-31 17:10:53,852 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 238 transitions. Word has length 228 [2022-01-31 17:10:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:53,852 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 238 transitions. [2022-01-31 17:10:53,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 90 states have internal predecessors, (203), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:10:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 238 transitions. [2022-01-31 17:10:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 17:10:53,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:53,853 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:53,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:10:53,853 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash 416543486, now seen corresponding path program 88 times [2022-01-31 17:10:53,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795105288] [2022-01-31 17:10:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:53,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:53,855 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:53,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:53,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:56,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:56,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-01-31 17:10:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:56,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-01-31 17:10:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 17:10:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:56,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-01-31 17:10:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:10:56,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:56,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795105288] [2022-01-31 17:10:56,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [795105288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:56,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:56,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:10:56,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230351179] [2022-01-31 17:10:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:56,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:10:56,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:10:56,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:10:56,457 INFO L87 Difference]: Start difference. First operand 230 states and 238 transitions. Second operand has 93 states, 93 states have (on average 2.204301075268817) internal successors, (205), 91 states have internal predecessors, (205), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:11:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:17,435 INFO L93 Difference]: Finished difference Result 814 states and 1008 transitions. [2022-01-31 17:11:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:11:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.204301075268817) internal successors, (205), 91 states have internal predecessors, (205), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 230 [2022-01-31 17:11:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:17,437 INFO L225 Difference]: With dead ends: 814 [2022-01-31 17:11:17,437 INFO L226 Difference]: Without dead ends: 767 [2022-01-31 17:11:17,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4270 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12474, Invalid=21198, Unknown=0, NotChecked=0, Total=33672 [2022-01-31 17:11:17,439 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1806 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:17,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 50 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:11:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-01-31 17:11:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 232. [2022-01-31 17:11:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 220 states have internal predecessors, (227), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:11:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2022-01-31 17:11:17,681 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 230 [2022-01-31 17:11:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:17,681 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2022-01-31 17:11:17,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.204301075268817) internal successors, (205), 91 states have internal predecessors, (205), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:11:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2022-01-31 17:11:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 17:11:17,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:17,682 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:17,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:11:17,683 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash 935293216, now seen corresponding path program 89 times [2022-01-31 17:11:17,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:17,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390480995] [2022-01-31 17:11:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:17,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:17,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:17,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:17,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-01-31 17:11:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-31 17:11:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 17:11:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-01-31 17:11:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:11:20,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:20,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390480995] [2022-01-31 17:11:20,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [390480995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:20,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:20,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:11:20,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188256843] [2022-01-31 17:11:20,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:20,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:11:20,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:20,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:11:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:11:20,329 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand has 94 states, 94 states have (on average 2.202127659574468) internal successors, (207), 92 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:11:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:42,077 INFO L93 Difference]: Finished difference Result 822 states and 1018 transitions. [2022-01-31 17:11:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:11:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.202127659574468) internal successors, (207), 92 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 232 [2022-01-31 17:11:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:42,079 INFO L225 Difference]: With dead ends: 822 [2022-01-31 17:11:42,079 INFO L226 Difference]: Without dead ends: 775 [2022-01-31 17:11:42,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4363 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12749, Invalid=21661, Unknown=0, NotChecked=0, Total=34410 [2022-01-31 17:11:42,081 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1909 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:42,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 48 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:11:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-31 17:11:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 234. [2022-01-31 17:11:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.0315315315315314) internal successors, (229), 222 states have internal predecessors, (229), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:11:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 242 transitions. [2022-01-31 17:11:42,371 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 242 transitions. Word has length 232 [2022-01-31 17:11:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:42,371 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 242 transitions. [2022-01-31 17:11:42,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.202127659574468) internal successors, (207), 92 states have internal predecessors, (207), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:11:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 242 transitions. [2022-01-31 17:11:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 17:11:42,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:42,372 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:42,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:11:42,372 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:42,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1237577410, now seen corresponding path program 90 times [2022-01-31 17:11:42,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177136806] [2022-01-31 17:11:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:42,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:42,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:42,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:42,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-01-31 17:11:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-01-31 17:11:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 17:11:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-31 17:11:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:11:45,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:45,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177136806] [2022-01-31 17:11:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [177136806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:45,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:45,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:11:45,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116274342] [2022-01-31 17:11:45,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:45,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:11:45,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:11:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:11:45,090 INFO L87 Difference]: Start difference. First operand 234 states and 242 transitions. Second operand has 95 states, 95 states have (on average 2.2) internal successors, (209), 93 states have internal predecessors, (209), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:12:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:07,520 INFO L93 Difference]: Finished difference Result 830 states and 1028 transitions. [2022-01-31 17:12:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:12:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2) internal successors, (209), 93 states have internal predecessors, (209), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 234 [2022-01-31 17:12:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:07,522 INFO L225 Difference]: With dead ends: 830 [2022-01-31 17:12:07,522 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 17:12:07,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13027, Invalid=22129, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 17:12:07,524 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1922 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 1195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1195 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:07,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 50 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1195 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:12:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 17:12:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 236. [2022-01-31 17:12:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:12:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 244 transitions. [2022-01-31 17:12:07,770 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 244 transitions. Word has length 234 [2022-01-31 17:12:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:07,771 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 244 transitions. [2022-01-31 17:12:07,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2) internal successors, (209), 93 states have internal predecessors, (209), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:12:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 244 transitions. [2022-01-31 17:12:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 17:12:07,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:07,772 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:07,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:12:07,772 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -325088284, now seen corresponding path program 91 times [2022-01-31 17:12:07,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:07,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322539903] [2022-01-31 17:12:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:07,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:07,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:07,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:07,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:10,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:10,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-01-31 17:12:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:10,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 17:12:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:10,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-01-31 17:12:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:10,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-01-31 17:12:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:12:10,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322539903] [2022-01-31 17:12:10,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [322539903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:10,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:10,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:12:10,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836826550] [2022-01-31 17:12:10,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:10,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:12:10,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:12:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:12:10,541 INFO L87 Difference]: Start difference. First operand 236 states and 244 transitions. Second operand has 96 states, 96 states have (on average 2.1979166666666665) internal successors, (211), 94 states have internal predecessors, (211), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:12:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:33,494 INFO L93 Difference]: Finished difference Result 838 states and 1038 transitions. [2022-01-31 17:12:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:12:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1979166666666665) internal successors, (211), 94 states have internal predecessors, (211), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 236 [2022-01-31 17:12:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:33,496 INFO L225 Difference]: With dead ends: 838 [2022-01-31 17:12:33,496 INFO L226 Difference]: Without dead ends: 791 [2022-01-31 17:12:33,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4552 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13308, Invalid=22602, Unknown=0, NotChecked=0, Total=35910 [2022-01-31 17:12:33,498 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1822 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1823 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:33,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1823 Valid, 50 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1120 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:12:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-31 17:12:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 238. [2022-01-31 17:12:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 226 states have (on average 1.0309734513274336) internal successors, (233), 226 states have internal predecessors, (233), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:12:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 246 transitions. [2022-01-31 17:12:33,759 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 246 transitions. Word has length 236 [2022-01-31 17:12:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:33,759 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 246 transitions. [2022-01-31 17:12:33,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1979166666666665) internal successors, (211), 94 states have internal predecessors, (211), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:12:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 246 transitions. [2022-01-31 17:12:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 17:12:33,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:33,760 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:33,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:12:33,760 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1191733382, now seen corresponding path program 92 times [2022-01-31 17:12:33,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:33,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455060412] [2022-01-31 17:12:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:33,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:33,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:33,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:33,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:36,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-01-31 17:12:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:36,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-01-31 17:12:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:36,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-01-31 17:12:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:36,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-01-31 17:12:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:12:36,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455060412] [2022-01-31 17:12:36,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455060412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:36,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:36,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:12:36,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919478991] [2022-01-31 17:12:36,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:36,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:12:36,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:12:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:12:36,591 INFO L87 Difference]: Start difference. First operand 238 states and 246 transitions. Second operand has 97 states, 97 states have (on average 2.195876288659794) internal successors, (213), 95 states have internal predecessors, (213), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:13:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:00,286 INFO L93 Difference]: Finished difference Result 846 states and 1048 transitions. [2022-01-31 17:13:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:13:00,287 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.195876288659794) internal successors, (213), 95 states have internal predecessors, (213), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 238 [2022-01-31 17:13:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:00,289 INFO L225 Difference]: With dead ends: 846 [2022-01-31 17:13:00,289 INFO L226 Difference]: Without dead ends: 799 [2022-01-31 17:13:00,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13592, Invalid=23080, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 17:13:00,292 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1925 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1926 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:00,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1926 Valid, 50 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1197 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:13:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-31 17:13:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 240. [2022-01-31 17:13:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 228 states have (on average 1.030701754385965) internal successors, (235), 228 states have internal predecessors, (235), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2022-01-31 17:13:00,554 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 238 [2022-01-31 17:13:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:00,554 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2022-01-31 17:13:00,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.195876288659794) internal successors, (213), 95 states have internal predecessors, (213), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:13:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2022-01-31 17:13:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 17:13:00,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:00,555 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:13:00,555 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1431526232, now seen corresponding path program 93 times [2022-01-31 17:13:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360168096] [2022-01-31 17:13:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:00,557 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:00,557 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:00,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:00,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-31 17:13:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-01-31 17:13:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-01-31 17:13:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-01-31 17:13:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:13:03,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360168096] [2022-01-31 17:13:03,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360168096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:03,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:03,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:13:03,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887612078] [2022-01-31 17:13:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:03,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:13:03,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:13:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:13:03,436 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand has 98 states, 98 states have (on average 2.193877551020408) internal successors, (215), 96 states have internal predecessors, (215), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:13:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:27,636 INFO L93 Difference]: Finished difference Result 854 states and 1058 transitions. [2022-01-31 17:13:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:13:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.193877551020408) internal successors, (215), 96 states have internal predecessors, (215), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 240 [2022-01-31 17:13:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:27,638 INFO L225 Difference]: With dead ends: 854 [2022-01-31 17:13:27,638 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 17:13:27,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4745 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=13879, Invalid=23563, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 17:13:27,640 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2119 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 1338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1338 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:27,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2120 Valid, 44 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1338 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:13:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 17:13:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 242. [2022-01-31 17:13:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.0304347826086957) internal successors, (237), 230 states have internal predecessors, (237), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 250 transitions. [2022-01-31 17:13:27,902 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 250 transitions. Word has length 240 [2022-01-31 17:13:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:27,902 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 250 transitions. [2022-01-31 17:13:27,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.193877551020408) internal successors, (215), 96 states have internal predecessors, (215), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:13:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 250 transitions. [2022-01-31 17:13:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 17:13:27,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:27,903 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:27,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:13:27,903 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1238212534, now seen corresponding path program 94 times [2022-01-31 17:13:27,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:27,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376943827] [2022-01-31 17:13:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:27,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:27,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:27,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:27,911 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-01-31 17:13:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-01-31 17:13:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-31 17:13:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2022-01-31 17:13:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 17:13:30,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:30,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376943827] [2022-01-31 17:13:30,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376943827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:30,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:30,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:13:30,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919509516] [2022-01-31 17:13:30,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:30,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:13:30,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:13:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:13:30,837 INFO L87 Difference]: Start difference. First operand 242 states and 250 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 97 states have internal predecessors, (217), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:13:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:55,976 INFO L93 Difference]: Finished difference Result 862 states and 1068 transitions. [2022-01-31 17:13:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:13:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 97 states have internal predecessors, (217), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 242 [2022-01-31 17:13:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:55,982 INFO L225 Difference]: With dead ends: 862 [2022-01-31 17:13:55,982 INFO L226 Difference]: Without dead ends: 815 [2022-01-31 17:13:55,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4843 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14169, Invalid=24051, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 17:13:55,985 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2222 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 1365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:55,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2223 Valid, 44 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1365 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:13:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-31 17:13:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 244. [2022-01-31 17:13:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 232 states have (on average 1.0301724137931034) internal successors, (239), 232 states have internal predecessors, (239), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 17:13:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 252 transitions. [2022-01-31 17:13:56,310 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 252 transitions. Word has length 242 [2022-01-31 17:13:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:56,311 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 252 transitions. [2022-01-31 17:13:56,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 97 states have internal predecessors, (217), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 17:13:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 252 transitions. [2022-01-31 17:13:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 17:13:56,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:56,312 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:56,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:13:56,312 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash -147342484, now seen corresponding path program 95 times [2022-01-31 17:13:56,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:56,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6753042] [2022-01-31 17:13:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:56,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:56,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:56,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:56,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat