/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:14:15,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:14:15,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:14:15,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:14:15,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:14:15,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:14:15,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:14:15,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:14:15,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:14:15,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:14:15,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:14:15,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:14:15,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:14:15,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:14:15,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:14:15,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:14:15,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:14:15,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:14:15,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:14:15,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:14:15,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 18:14:15,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:14:15,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:14:15,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:14:15,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:14:15,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:14:15,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:14:15,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:14:15,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:14:15,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:14:15,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:14:15,268 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:14:15,268 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:14:15,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:14:15,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:14:15,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:14:15,447 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:14:15,456 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:14:15,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2022-01-31 18:14:15,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eef072a8/8e6f686211f44c2f9fd6d9f11fab63c6/FLAGba57b2173 [2022-01-31 18:14:15,820 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:14:15,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2022-01-31 18:14:15,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eef072a8/8e6f686211f44c2f9fd6d9f11fab63c6/FLAGba57b2173 [2022-01-31 18:14:16,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eef072a8/8e6f686211f44c2f9fd6d9f11fab63c6 [2022-01-31 18:14:16,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:14:16,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:14:16,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:14:16,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:14:16,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:14:16,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126f3cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16, skipping insertion in model container [2022-01-31 18:14:16,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:14:16,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:14:16,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2022-01-31 18:14:16,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:14:16,403 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:14:16,411 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2022-01-31 18:14:16,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:14:16,425 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:14:16,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16 WrapperNode [2022-01-31 18:14:16,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:14:16,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:14:16,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:14:16,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:14:16,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:14:16,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:14:16,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:14:16,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:14:16,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (1/1) ... [2022-01-31 18:14:16,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:14:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:14:16,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 18:14:16,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 18:14:16,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:14:16,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:14:16,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:14:16,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:14:16,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:14:16,544 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 18:14:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:14:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:14:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:14:16,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 18:14:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:14:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:14:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:14:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:14:16,634 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:14:16,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:14:16,813 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:14:16,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:14:16,817 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 18:14:16,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:14:16 BoogieIcfgContainer [2022-01-31 18:14:16,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:14:16,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:14:16,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:14:16,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:14:16,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:14:16" (1/3) ... [2022-01-31 18:14:16,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf4ad6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:14:16, skipping insertion in model container [2022-01-31 18:14:16,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:16" (2/3) ... [2022-01-31 18:14:16,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf4ad6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:14:16, skipping insertion in model container [2022-01-31 18:14:16,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:14:16" (3/3) ... [2022-01-31 18:14:16,839 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2022-01-31 18:14:16,843 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:14:16,843 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:14:16,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:14:16,912 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 18:14:16,912 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:14:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:14:16,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:16,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:16,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash 135807006, now seen corresponding path program 1 times [2022-01-31 18:14:16,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:16,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059605496] [2022-01-31 18:14:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:16,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:17,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:17,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:17,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059605496] [2022-01-31 18:14:17,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059605496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:17,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:17,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:14:17,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496785441] [2022-01-31 18:14:17,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:17,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:14:17,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:17,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:14:17,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:14:17,209 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 18:14:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:17,284 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-01-31 18:14:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:14:17,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 18:14:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:17,295 INFO L225 Difference]: With dead ends: 51 [2022-01-31 18:14:17,295 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 18:14:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:14:17,300 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:17,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:14:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 18:14:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2022-01-31 18:14:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 18:14:17,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 18:14:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:17,336 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 18:14:17,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 18:14:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 18:14:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:14:17,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:17,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:17,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:14:17,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1045890869, now seen corresponding path program 1 times [2022-01-31 18:14:17,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112891381] [2022-01-31 18:14:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:17,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:17,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:17,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112891381] [2022-01-31 18:14:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1112891381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:17,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:17,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:14:17,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047081070] [2022-01-31 18:14:17,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:17,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:14:17,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:14:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:14:17,434 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. 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 18:14:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:17,502 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-31 18:14:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:14:17,503 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 18:14:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:17,505 INFO L225 Difference]: With dead ends: 43 [2022-01-31 18:14:17,505 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 18:14:17,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:14:17,506 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:17,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:14:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 18:14:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-01-31 18:14:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 18:14:17,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-01-31 18:14:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:17,516 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 18:14:17,516 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 18:14:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 18:14:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 18:14:17,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:17,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:17,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:14:17,517 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1435302576, now seen corresponding path program 1 times [2022-01-31 18:14:17,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:17,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479319853] [2022-01-31 18:14:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:17,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:17,533 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:17,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:17,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:17,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:17,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479319853] [2022-01-31 18:14:17,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479319853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:17,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:17,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:14:17,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224649890] [2022-01-31 18:14:17,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:14:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:17,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:14:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:14:17,629 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:17,687 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-01-31 18:14:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:14:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 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 18:14:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:17,689 INFO L225 Difference]: With dead ends: 52 [2022-01-31 18:14:17,689 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 18:14:17,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:14:17,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:17,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:14:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 18:14:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-01-31 18:14:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 18:14:17,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2022-01-31 18:14:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:17,695 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 18:14:17,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 18:14:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 18:14:17,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:17,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:17,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:14:17,696 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1914929685, now seen corresponding path program 2 times [2022-01-31 18:14:17,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105505748] [2022-01-31 18:14:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:17,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:17,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:17,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:17,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:17,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:17,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105505748] [2022-01-31 18:14:17,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105505748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:17,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:17,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:14:17,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99532667] [2022-01-31 18:14:17,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:17,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:14:17,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:14:17,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:14:17,793 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:17,880 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-01-31 18:14:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:14:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 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 22 [2022-01-31 18:14:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:17,882 INFO L225 Difference]: With dead ends: 61 [2022-01-31 18:14:17,882 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 18:14:17,884 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 18:14:17,888 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:17,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 18:14:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2022-01-31 18:14:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 18:14:17,892 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2022-01-31 18:14:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:17,892 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 18:14:17,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 18:14:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 18:14:17,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:17,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:17,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:14:17,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash -944910598, now seen corresponding path program 3 times [2022-01-31 18:14:17,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:17,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115341878] [2022-01-31 18:14:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:17,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:17,915 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:17,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:17,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115341878] [2022-01-31 18:14:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [115341878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:14:18,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553922310] [2022-01-31 18:14:18,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:14:18,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:14:18,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:14:18,009 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:18,094 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-31 18:14:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:14:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 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 26 [2022-01-31 18:14:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:18,097 INFO L225 Difference]: With dead ends: 70 [2022-01-31 18:14:18,097 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 18:14:18,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:14:18,097 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:18,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 18:14:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2022-01-31 18:14:18,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-31 18:14:18,102 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-01-31 18:14:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:18,103 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-31 18:14:18,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-31 18:14:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:14:18,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:18,104 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:18,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:14:18,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2083708577, now seen corresponding path program 4 times [2022-01-31 18:14:18,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639920173] [2022-01-31 18:14:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:18,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:18,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:18,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639920173] [2022-01-31 18:14:18,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639920173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:14:18,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334962324] [2022-01-31 18:14:18,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:14:18,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:14:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:14:18,194 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:18,282 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-01-31 18:14:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:14:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 18:14:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:18,283 INFO L225 Difference]: With dead ends: 79 [2022-01-31 18:14:18,283 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 18:14:18,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:14:18,284 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:18,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 66 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 18:14:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-01-31 18:14:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-31 18:14:18,288 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 30 [2022-01-31 18:14:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:18,289 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-31 18:14:18,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-31 18:14:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 18:14:18,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:18,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:18,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:14:18,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1585268412, now seen corresponding path program 5 times [2022-01-31 18:14:18,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162767858] [2022-01-31 18:14:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:18,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:18,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:18,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:18,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162767858] [2022-01-31 18:14:18,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [162767858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:14:18,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715260272] [2022-01-31 18:14:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:14:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:14:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:14:18,379 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:18,479 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-01-31 18:14:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:14:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 18:14:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:18,480 INFO L225 Difference]: With dead ends: 88 [2022-01-31 18:14:18,480 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 18:14:18,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:14:18,481 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:18,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 62 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 18:14:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-01-31 18:14:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-01-31 18:14:18,485 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 34 [2022-01-31 18:14:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:18,485 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-01-31 18:14:18,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-01-31 18:14:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 18:14:18,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:18,486 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:18,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:14:18,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash 959436457, now seen corresponding path program 6 times [2022-01-31 18:14:18,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:18,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763172501] [2022-01-31 18:14:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:18,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:18,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:18,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:18,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763172501] [2022-01-31 18:14:18,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763172501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:14:18,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956705434] [2022-01-31 18:14:18,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:14:18,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:14:18,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:14:18,586 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:18,673 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2022-01-31 18:14:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:14:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 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 38 [2022-01-31 18:14:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:18,675 INFO L225 Difference]: With dead ends: 97 [2022-01-31 18:14:18,675 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 18:14:18,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:14:18,676 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:18,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 74 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 18:14:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2022-01-31 18:14:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-01-31 18:14:18,680 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2022-01-31 18:14:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:18,680 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-01-31 18:14:18,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-01-31 18:14:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 18:14:18,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:18,682 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:18,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:14:18,682 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash -795494002, now seen corresponding path program 7 times [2022-01-31 18:14:18,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:18,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244085179] [2022-01-31 18:14:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:18,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:18,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:18,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:18,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244085179] [2022-01-31 18:14:18,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [244085179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:14:18,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204990685] [2022-01-31 18:14:18,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:14:18,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:14:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:14:18,805 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:18,900 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-01-31 18:14:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:14:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 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 42 [2022-01-31 18:14:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:18,902 INFO L225 Difference]: With dead ends: 106 [2022-01-31 18:14:18,902 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 18:14:18,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:14:18,904 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:18,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 75 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 18:14:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2022-01-31 18:14:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-01-31 18:14:18,912 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 42 [2022-01-31 18:14:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:18,914 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-01-31 18:14:18,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-01-31 18:14:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 18:14:18,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:18,916 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:18,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:14:18,916 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1428839949, now seen corresponding path program 8 times [2022-01-31 18:14:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100533174] [2022-01-31 18:14:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:18,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:18,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:18,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:18,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:19,081 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100533174] [2022-01-31 18:14:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [100533174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:19,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:19,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:14:19,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919890256] [2022-01-31 18:14:19,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:19,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:14:19,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:14:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:14:19,083 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:19,190 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2022-01-31 18:14:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:14:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 18:14:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:19,191 INFO L225 Difference]: With dead ends: 115 [2022-01-31 18:14:19,191 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 18:14:19,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:14:19,192 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:19,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 88 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 18:14:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2022-01-31 18:14:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 18:14:19,196 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 46 [2022-01-31 18:14:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:19,196 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 18:14:19,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 18:14:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 18:14:19,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:19,197 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:19,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:14:19,197 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash 410046424, now seen corresponding path program 9 times [2022-01-31 18:14:19,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:19,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740712939] [2022-01-31 18:14:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:19,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:19,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:19,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:19,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:19,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740712939] [2022-01-31 18:14:19,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740712939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:19,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:19,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:14:19,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237937662] [2022-01-31 18:14:19,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:19,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:14:19,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:14:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:14:19,323 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:19,450 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2022-01-31 18:14:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:14:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 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 50 [2022-01-31 18:14:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:19,451 INFO L225 Difference]: With dead ends: 124 [2022-01-31 18:14:19,451 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 18:14:19,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:14:19,452 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:19,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 98 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 18:14:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2022-01-31 18:14:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-01-31 18:14:19,456 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 50 [2022-01-31 18:14:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:19,456 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-01-31 18:14:19,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-01-31 18:14:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 18:14:19,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:19,457 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:19,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:14:19,457 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -951549123, now seen corresponding path program 10 times [2022-01-31 18:14:19,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136687483] [2022-01-31 18:14:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:19,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:19,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:19,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:19,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:19,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:19,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136687483] [2022-01-31 18:14:19,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136687483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:19,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:19,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:14:19,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712466940] [2022-01-31 18:14:19,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:14:19,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:14:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:14:19,589 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:19,712 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-01-31 18:14:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:14:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 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 54 [2022-01-31 18:14:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:19,713 INFO L225 Difference]: With dead ends: 133 [2022-01-31 18:14:19,713 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 18:14:19,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:14:19,714 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 176 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:19,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 101 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 18:14:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2022-01-31 18:14:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-01-31 18:14:19,718 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 54 [2022-01-31 18:14:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:19,718 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-01-31 18:14:19,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-01-31 18:14:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 18:14:19,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:19,719 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:14:19,719 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash 312343586, now seen corresponding path program 11 times [2022-01-31 18:14:19,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:19,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944158757] [2022-01-31 18:14:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:19,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:19,725 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:19,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:19,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:19,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944158757] [2022-01-31 18:14:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944158757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:19,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:19,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:14:19,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961593056] [2022-01-31 18:14:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:19,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:14:19,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:14:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:14:19,885 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:20,030 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2022-01-31 18:14:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:14:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 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 58 [2022-01-31 18:14:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:20,032 INFO L225 Difference]: With dead ends: 142 [2022-01-31 18:14:20,032 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 18:14:20,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:14:20,032 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:20,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 116 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 18:14:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 67. [2022-01-31 18:14:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-01-31 18:14:20,037 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 58 [2022-01-31 18:14:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:20,037 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-01-31 18:14:20,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-01-31 18:14:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:14:20,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:20,038 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:20,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:14:20,038 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1393719943, now seen corresponding path program 12 times [2022-01-31 18:14:20,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858785382] [2022-01-31 18:14:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:20,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:20,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:20,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:20,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:20,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:20,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858785382] [2022-01-31 18:14:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858785382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:20,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:20,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:14:20,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904464564] [2022-01-31 18:14:20,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:20,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:14:20,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:14:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:14:20,197 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:20,378 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2022-01-31 18:14:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:14:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 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 62 [2022-01-31 18:14:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:20,380 INFO L225 Difference]: With dead ends: 151 [2022-01-31 18:14:20,380 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 18:14:20,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:14:20,380 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:20,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 125 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 18:14:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 71. [2022-01-31 18:14:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-01-31 18:14:20,385 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 62 [2022-01-31 18:14:20,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:20,385 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-01-31 18:14:20,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-01-31 18:14:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 18:14:20,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:20,386 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:20,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:14:20,386 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 782712428, now seen corresponding path program 13 times [2022-01-31 18:14:20,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:20,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265750124] [2022-01-31 18:14:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:20,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:20,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:20,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:20,394 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:20,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265750124] [2022-01-31 18:14:20,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265750124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:20,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:20,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:14:20,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51923582] [2022-01-31 18:14:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:20,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:14:20,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:14:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:14:20,566 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:20,739 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2022-01-31 18:14:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:14:20,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-01-31 18:14:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:20,740 INFO L225 Difference]: With dead ends: 160 [2022-01-31 18:14:20,740 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 18:14:20,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:14:20,741 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 210 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:20,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 123 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 18:14:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 75. [2022-01-31 18:14:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-01-31 18:14:20,748 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 66 [2022-01-31 18:14:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:20,748 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-01-31 18:14:20,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-01-31 18:14:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 18:14:20,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:20,749 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:20,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:14:20,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash -390232111, now seen corresponding path program 14 times [2022-01-31 18:14:20,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488737292] [2022-01-31 18:14:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:20,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:20,755 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:20,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:20,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:20,942 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488737292] [2022-01-31 18:14:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1488737292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:20,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:20,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:14:20,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965471751] [2022-01-31 18:14:20,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:20,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:14:20,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:14:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:14:20,943 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:21,112 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2022-01-31 18:14:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:14:21,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 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 70 [2022-01-31 18:14:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:21,113 INFO L225 Difference]: With dead ends: 169 [2022-01-31 18:14:21,114 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 18:14:21,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:14:21,114 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:21,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 139 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 18:14:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 79. [2022-01-31 18:14:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-01-31 18:14:21,118 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 70 [2022-01-31 18:14:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:21,118 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-01-31 18:14:21,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-01-31 18:14:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 18:14:21,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:21,118 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:21,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:14:21,119 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1307142474, now seen corresponding path program 15 times [2022-01-31 18:14:21,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:21,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246028955] [2022-01-31 18:14:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:21,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:21,124 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:21,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:21,127 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:21,357 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:21,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246028955] [2022-01-31 18:14:21,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246028955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:21,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:21,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:14:21,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487738630] [2022-01-31 18:14:21,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:21,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:14:21,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:14:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:14:21,359 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:21,538 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2022-01-31 18:14:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:14:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 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 74 [2022-01-31 18:14:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:21,540 INFO L225 Difference]: With dead ends: 178 [2022-01-31 18:14:21,540 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 18:14:21,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:14:21,540 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:21,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 160 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 18:14:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 83. [2022-01-31 18:14:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-01-31 18:14:21,544 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 74 [2022-01-31 18:14:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:21,544 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-01-31 18:14:21,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-01-31 18:14:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 18:14:21,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:21,545 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:21,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:14:21,545 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash -120345829, now seen corresponding path program 16 times [2022-01-31 18:14:21,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:21,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321331470] [2022-01-31 18:14:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:21,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:21,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:21,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:21,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:21,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:21,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321331470] [2022-01-31 18:14:21,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [321331470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:21,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:21,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:14:21,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978863731] [2022-01-31 18:14:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:21,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:14:21,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:14:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:14:21,772 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:21,984 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2022-01-31 18:14:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:14:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (3), 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 78 [2022-01-31 18:14:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:21,986 INFO L225 Difference]: With dead ends: 187 [2022-01-31 18:14:21,986 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 18:14:21,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:14:21,986 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 246 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:21,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 153 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 18:14:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 87. [2022-01-31 18:14:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-01-31 18:14:21,990 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 78 [2022-01-31 18:14:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:21,990 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-01-31 18:14:21,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-01-31 18:14:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 18:14:21,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:21,991 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:21,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:14:21,991 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1200225024, now seen corresponding path program 17 times [2022-01-31 18:14:21,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:21,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186199225] [2022-01-31 18:14:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:21,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:21,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:21,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:21,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:22,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:22,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:22,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186199225] [2022-01-31 18:14:22,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [186199225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:22,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:22,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:14:22,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145647741] [2022-01-31 18:14:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:22,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:14:22,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:14:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:14:22,229 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:22,460 INFO L93 Difference]: Finished difference Result 196 states and 255 transitions. [2022-01-31 18:14:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:14:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (3), 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 82 [2022-01-31 18:14:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:22,461 INFO L225 Difference]: With dead ends: 196 [2022-01-31 18:14:22,461 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 18:14:22,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:14:22,462 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 320 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:22,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 154 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 18:14:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 91. [2022-01-31 18:14:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-01-31 18:14:22,466 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 82 [2022-01-31 18:14:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:22,466 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-01-31 18:14:22,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-01-31 18:14:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 18:14:22,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:22,466 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:22,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:14:22,467 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash -908139419, now seen corresponding path program 18 times [2022-01-31 18:14:22,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:22,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166822079] [2022-01-31 18:14:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:22,472 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:22,472 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:22,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:22,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:22,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:22,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:22,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166822079] [2022-01-31 18:14:22,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [166822079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:22,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:22,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:14:22,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348732305] [2022-01-31 18:14:22,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:14:22,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:14:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:14:22,731 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:22,960 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2022-01-31 18:14:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:14:22,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-01-31 18:14:22,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:22,964 INFO L225 Difference]: With dead ends: 205 [2022-01-31 18:14:22,964 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 18:14:22,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:14:22,964 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 279 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:22,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 169 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 18:14:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2022-01-31 18:14:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-01-31 18:14:22,968 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 86 [2022-01-31 18:14:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:22,968 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-01-31 18:14:22,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-01-31 18:14:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 18:14:22,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:22,969 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:22,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:14:22,969 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 860850506, now seen corresponding path program 19 times [2022-01-31 18:14:22,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:22,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94978708] [2022-01-31 18:14:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:22,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:22,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:22,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:22,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:23,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:23,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94978708] [2022-01-31 18:14:23,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [94978708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:23,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:23,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:14:23,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807883351] [2022-01-31 18:14:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:23,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:14:23,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:14:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:14:23,240 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:23,463 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2022-01-31 18:14:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:14:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 2 states have call successors, (3), 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 90 [2022-01-31 18:14:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:23,464 INFO L225 Difference]: With dead ends: 214 [2022-01-31 18:14:23,464 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 18:14:23,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:14:23,464 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 331 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:23,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 160 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 18:14:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 99. [2022-01-31 18:14:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-01-31 18:14:23,468 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 90 [2022-01-31 18:14:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:23,468 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-01-31 18:14:23,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-01-31 18:14:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 18:14:23,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:23,469 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:23,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:14:23,469 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2020160431, now seen corresponding path program 20 times [2022-01-31 18:14:23,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187414393] [2022-01-31 18:14:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:23,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:23,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:23,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:23,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:23,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187414393] [2022-01-31 18:14:23,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [187414393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:23,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:23,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:14:23,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117360364] [2022-01-31 18:14:23,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:23,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:14:23,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:14:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:14:23,781 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:24,009 INFO L93 Difference]: Finished difference Result 223 states and 291 transitions. [2022-01-31 18:14:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:14:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 2 states have call successors, (3), 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 94 [2022-01-31 18:14:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:24,010 INFO L225 Difference]: With dead ends: 223 [2022-01-31 18:14:24,010 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 18:14:24,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:14:24,011 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 391 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:24,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 163 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 18:14:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 103. [2022-01-31 18:14:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 97 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-01-31 18:14:24,015 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 94 [2022-01-31 18:14:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:24,015 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-01-31 18:14:24,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-01-31 18:14:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 18:14:24,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:24,016 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:14:24,016 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash -366140524, now seen corresponding path program 21 times [2022-01-31 18:14:24,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445464068] [2022-01-31 18:14:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:24,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:24,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:24,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:24,028 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:24,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445464068] [2022-01-31 18:14:24,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445464068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:24,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:24,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:14:24,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418907676] [2022-01-31 18:14:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:24,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:14:24,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:24,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:14:24,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:14:24,332 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:24,592 INFO L93 Difference]: Finished difference Result 232 states and 303 transitions. [2022-01-31 18:14:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:14:24,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 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 98 [2022-01-31 18:14:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:24,593 INFO L225 Difference]: With dead ends: 232 [2022-01-31 18:14:24,593 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 18:14:24,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:14:24,594 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 383 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:24,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 173 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 18:14:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 107. [2022-01-31 18:14:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-01-31 18:14:24,598 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 98 [2022-01-31 18:14:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:24,598 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-01-31 18:14:24,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-01-31 18:14:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 18:14:24,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:24,599 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:24,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:14:24,599 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash -151217927, now seen corresponding path program 22 times [2022-01-31 18:14:24,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:24,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429245448] [2022-01-31 18:14:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:24,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:24,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:24,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:24,608 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:24,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:24,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429245448] [2022-01-31 18:14:24,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429245448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:24,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:24,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:14:24,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593422950] [2022-01-31 18:14:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:24,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:14:24,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:14:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:14:24,929 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:25,169 INFO L93 Difference]: Finished difference Result 241 states and 315 transitions. [2022-01-31 18:14:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:14:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (3), 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 102 [2022-01-31 18:14:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:25,171 INFO L225 Difference]: With dead ends: 241 [2022-01-31 18:14:25,171 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 18:14:25,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:14:25,171 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 378 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:25,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 185 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 18:14:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2022-01-31 18:14:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2022-01-31 18:14:25,176 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 102 [2022-01-31 18:14:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:25,176 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2022-01-31 18:14:25,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2022-01-31 18:14:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 18:14:25,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:25,177 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:25,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:14:25,177 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2056836062, now seen corresponding path program 23 times [2022-01-31 18:14:25,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:25,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125410055] [2022-01-31 18:14:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:25,196 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:25,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:25,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:25,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:25,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:25,596 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:25,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125410055] [2022-01-31 18:14:25,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125410055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:25,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:25,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:14:25,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455248212] [2022-01-31 18:14:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:25,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:14:25,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:14:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:14:25,598 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:25,863 INFO L93 Difference]: Finished difference Result 250 states and 327 transitions. [2022-01-31 18:14:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:14:25,864 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 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 106 [2022-01-31 18:14:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:25,865 INFO L225 Difference]: With dead ends: 250 [2022-01-31 18:14:25,865 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 18:14:25,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:14:25,866 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 465 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:25,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 186 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 18:14:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 115. [2022-01-31 18:14:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 109 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2022-01-31 18:14:25,871 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 106 [2022-01-31 18:14:25,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:25,871 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2022-01-31 18:14:25,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2022-01-31 18:14:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 18:14:25,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:25,872 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:25,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:14:25,872 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 237179971, now seen corresponding path program 24 times [2022-01-31 18:14:25,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:25,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234560816] [2022-01-31 18:14:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:25,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:25,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:25,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:25,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:26,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:26,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234560816] [2022-01-31 18:14:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [234560816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:26,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:26,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:14:26,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774600000] [2022-01-31 18:14:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:26,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:14:26,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:14:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:14:26,237 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:26,494 INFO L93 Difference]: Finished difference Result 259 states and 339 transitions. [2022-01-31 18:14:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:14:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-01-31 18:14:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:26,496 INFO L225 Difference]: With dead ends: 259 [2022-01-31 18:14:26,496 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 18:14:26,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:14:26,497 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 392 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:26,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 204 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 18:14:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 119. [2022-01-31 18:14:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.247787610619469) internal successors, (141), 113 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2022-01-31 18:14:26,512 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 110 [2022-01-31 18:14:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:26,512 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2022-01-31 18:14:26,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2022-01-31 18:14:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 18:14:26,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:26,513 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:26,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:14:26,513 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1478269480, now seen corresponding path program 25 times [2022-01-31 18:14:26,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:26,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648168137] [2022-01-31 18:14:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:26,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:26,517 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:26,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:26,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:26,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648168137] [2022-01-31 18:14:26,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [648168137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:26,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:26,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:14:26,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339962003] [2022-01-31 18:14:26,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:14:26,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:14:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:14:26,933 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:27,231 INFO L93 Difference]: Finished difference Result 268 states and 351 transitions. [2022-01-31 18:14:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:14:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 2 states have call successors, (3), 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 114 [2022-01-31 18:14:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:27,232 INFO L225 Difference]: With dead ends: 268 [2022-01-31 18:14:27,232 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 18:14:27,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:14:27,233 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 404 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:27,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 212 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 18:14:27,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 123. [2022-01-31 18:14:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 117 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-01-31 18:14:27,238 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 114 [2022-01-31 18:14:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:27,238 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-01-31 18:14:27,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:27,238 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-01-31 18:14:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 18:14:27,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:27,239 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:27,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:14:27,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1550230925, now seen corresponding path program 26 times [2022-01-31 18:14:27,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:27,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556513108] [2022-01-31 18:14:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:27,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:27,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:27,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:27,248 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:27,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556513108] [2022-01-31 18:14:27,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [556513108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:27,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:27,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:14:27,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438130659] [2022-01-31 18:14:27,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:27,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:14:27,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:14:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:14:27,643 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:27,928 INFO L93 Difference]: Finished difference Result 277 states and 363 transitions. [2022-01-31 18:14:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:14:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 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 118 [2022-01-31 18:14:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:27,930 INFO L225 Difference]: With dead ends: 277 [2022-01-31 18:14:27,930 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 18:14:27,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:14:27,931 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 544 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:27,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 199 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 18:14:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 127. [2022-01-31 18:14:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2022-01-31 18:14:27,936 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 118 [2022-01-31 18:14:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:27,936 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2022-01-31 18:14:27,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2022-01-31 18:14:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 18:14:27,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:27,937 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:27,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:14:27,937 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash -868059534, now seen corresponding path program 27 times [2022-01-31 18:14:27,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:27,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618652357] [2022-01-31 18:14:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:27,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:27,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:27,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:27,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:28,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:28,432 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618652357] [2022-01-31 18:14:28,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618652357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:28,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:28,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:14:28,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012611676] [2022-01-31 18:14:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:28,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:14:28,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:14:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:14:28,433 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:28,723 INFO L93 Difference]: Finished difference Result 286 states and 375 transitions. [2022-01-31 18:14:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:14:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 states have internal predecessors, (118), 2 states have call successors, (3), 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 122 [2022-01-31 18:14:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:28,724 INFO L225 Difference]: With dead ends: 286 [2022-01-31 18:14:28,724 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 18:14:28,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:14:28,725 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 511 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:28,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 214 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 18:14:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 131. [2022-01-31 18:14:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.248) internal successors, (156), 125 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2022-01-31 18:14:28,730 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 122 [2022-01-31 18:14:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2022-01-31 18:14:28,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2022-01-31 18:14:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 18:14:28,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:28,731 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:28,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:14:28,731 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1448168663, now seen corresponding path program 28 times [2022-01-31 18:14:28,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:28,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439521954] [2022-01-31 18:14:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:28,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:28,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:28,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:28,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:29,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439521954] [2022-01-31 18:14:29,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439521954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:29,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:29,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:14:29,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761278334] [2022-01-31 18:14:29,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:29,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:14:29,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:14:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:14:29,184 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:29,501 INFO L93 Difference]: Finished difference Result 295 states and 387 transitions. [2022-01-31 18:14:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:14:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (3), 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 126 [2022-01-31 18:14:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:29,503 INFO L225 Difference]: With dead ends: 295 [2022-01-31 18:14:29,503 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 18:14:29,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:14:29,504 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 604 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:29,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 215 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 18:14:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 135. [2022-01-31 18:14:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.248062015503876) internal successors, (161), 129 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2022-01-31 18:14:29,510 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 126 [2022-01-31 18:14:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:29,510 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2022-01-31 18:14:29,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2022-01-31 18:14:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 18:14:29,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:29,511 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:29,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:14:29,511 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -158046020, now seen corresponding path program 29 times [2022-01-31 18:14:29,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:29,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518934548] [2022-01-31 18:14:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:29,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:29,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:29,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:29,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:29,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518934548] [2022-01-31 18:14:29,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518934548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:29,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:29,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:14:29,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127132592] [2022-01-31 18:14:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:29,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:14:29,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:29,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:14:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:14:29,965 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:30,318 INFO L93 Difference]: Finished difference Result 304 states and 399 transitions. [2022-01-31 18:14:30,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:14:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 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 130 [2022-01-31 18:14:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:30,320 INFO L225 Difference]: With dead ends: 304 [2022-01-31 18:14:30,320 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 18:14:30,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:14:30,322 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 556 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:30,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 242 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 18:14:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 139. [2022-01-31 18:14:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 133 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2022-01-31 18:14:30,329 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 130 [2022-01-31 18:14:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:30,329 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2022-01-31 18:14:30,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2022-01-31 18:14:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 18:14:30,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:30,331 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:30,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:14:30,331 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1181551137, now seen corresponding path program 30 times [2022-01-31 18:14:30,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399344545] [2022-01-31 18:14:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:30,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:30,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:30,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:30,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399344545] [2022-01-31 18:14:30,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399344545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:30,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:30,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:14:30,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438834391] [2022-01-31 18:14:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:30,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:14:30,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:14:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:14:30,898 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:31,321 INFO L93 Difference]: Finished difference Result 313 states and 411 transitions. [2022-01-31 18:14:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:14:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (3), 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 134 [2022-01-31 18:14:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:31,322 INFO L225 Difference]: With dead ends: 313 [2022-01-31 18:14:31,322 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 18:14:31,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:14:31,323 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 545 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:31,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 246 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 18:14:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 143. [2022-01-31 18:14:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 137 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-01-31 18:14:31,328 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 134 [2022-01-31 18:14:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:31,329 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-01-31 18:14:31,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-01-31 18:14:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 18:14:31,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:31,329 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:31,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:14:31,330 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash -862162682, now seen corresponding path program 31 times [2022-01-31 18:14:31,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:31,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811157129] [2022-01-31 18:14:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:31,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:31,334 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:31,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:31,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:31,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811157129] [2022-01-31 18:14:31,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811157129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:31,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:31,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:14:31,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495249911] [2022-01-31 18:14:31,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:31,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:14:31,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:14:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:14:31,873 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:32,272 INFO L93 Difference]: Finished difference Result 322 states and 423 transitions. [2022-01-31 18:14:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:14:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 states have internal predecessors, (134), 2 states have call successors, (3), 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 138 [2022-01-31 18:14:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:32,274 INFO L225 Difference]: With dead ends: 322 [2022-01-31 18:14:32,274 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 18:14:32,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:14:32,277 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 537 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:32,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 253 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 18:14:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 147. [2022-01-31 18:14:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.24822695035461) internal successors, (176), 141 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2022-01-31 18:14:32,283 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 138 [2022-01-31 18:14:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:32,284 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2022-01-31 18:14:32,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2022-01-31 18:14:32,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 18:14:32,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:32,284 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:32,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:14:32,285 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1296293227, now seen corresponding path program 32 times [2022-01-31 18:14:32,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:32,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685728086] [2022-01-31 18:14:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:32,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:32,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:32,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:32,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:32,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:32,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:32,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685728086] [2022-01-31 18:14:32,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [685728086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:32,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:32,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:14:32,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224014375] [2022-01-31 18:14:32,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:32,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:14:32,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:32,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:14:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:14:32,898 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:33,263 INFO L93 Difference]: Finished difference Result 331 states and 435 transitions. [2022-01-31 18:14:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:14:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 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 142 [2022-01-31 18:14:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:33,265 INFO L225 Difference]: With dead ends: 331 [2022-01-31 18:14:33,265 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 18:14:33,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:14:33,265 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 525 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:33,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 271 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 18:14:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 151. [2022-01-31 18:14:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 145 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2022-01-31 18:14:33,271 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 142 [2022-01-31 18:14:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:33,271 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2022-01-31 18:14:33,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2022-01-31 18:14:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 18:14:33,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:33,272 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:33,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:14:33,272 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash 434409296, now seen corresponding path program 33 times [2022-01-31 18:14:33,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:33,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839201775] [2022-01-31 18:14:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:33,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:33,277 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:33,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:33,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:33,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839201775] [2022-01-31 18:14:33,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [839201775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:33,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:33,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:14:33,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900386551] [2022-01-31 18:14:33,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:33,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:14:33,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:14:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:14:33,807 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:34,163 INFO L93 Difference]: Finished difference Result 340 states and 447 transitions. [2022-01-31 18:14:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:14:34,163 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 states have internal predecessors, (142), 2 states have call successors, (3), 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 146 [2022-01-31 18:14:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:34,165 INFO L225 Difference]: With dead ends: 340 [2022-01-31 18:14:34,165 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 18:14:34,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:14:34,167 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 538 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:34,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 265 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 18:14:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 155. [2022-01-31 18:14:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.2483221476510067) internal successors, (186), 149 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2022-01-31 18:14:34,173 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 146 [2022-01-31 18:14:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:34,173 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2022-01-31 18:14:34,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2022-01-31 18:14:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 18:14:34,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:34,174 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:34,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:14:34,174 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1633666741, now seen corresponding path program 34 times [2022-01-31 18:14:34,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:34,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764696659] [2022-01-31 18:14:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:34,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:34,178 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:34,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:34,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:34,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:34,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:34,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764696659] [2022-01-31 18:14:34,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [764696659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:34,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:34,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:14:34,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190514379] [2022-01-31 18:14:34,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:34,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:14:34,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:14:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:14:34,719 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:35,108 INFO L93 Difference]: Finished difference Result 349 states and 459 transitions. [2022-01-31 18:14:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:14:35,108 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 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 150 [2022-01-31 18:14:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:35,109 INFO L225 Difference]: With dead ends: 349 [2022-01-31 18:14:35,109 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 18:14:35,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:14:35,110 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 683 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:35,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 268 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 18:14:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 159. [2022-01-31 18:14:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.2483660130718954) internal successors, (191), 153 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2022-01-31 18:14:35,118 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 150 [2022-01-31 18:14:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:35,119 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2022-01-31 18:14:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2022-01-31 18:14:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 18:14:35,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:35,119 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:35,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:14:35,120 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2146878362, now seen corresponding path program 35 times [2022-01-31 18:14:35,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:35,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338562942] [2022-01-31 18:14:35,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:35,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:35,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:35,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:35,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:35,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:35,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:35,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338562942] [2022-01-31 18:14:35,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [338562942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:35,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:35,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:14:35,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108482673] [2022-01-31 18:14:35,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:35,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:14:35,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:14:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:14:35,704 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:36,012 INFO L93 Difference]: Finished difference Result 358 states and 471 transitions. [2022-01-31 18:14:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:14:36,013 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 2 states have call successors, (3), 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 154 [2022-01-31 18:14:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:36,031 INFO L225 Difference]: With dead ends: 358 [2022-01-31 18:14:36,032 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 18:14:36,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:14:36,033 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 771 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:36,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 261 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 18:14:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 163. [2022-01-31 18:14:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2022-01-31 18:14:36,052 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 154 [2022-01-31 18:14:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:36,052 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2022-01-31 18:14:36,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2022-01-31 18:14:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 18:14:36,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:36,053 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:36,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:14:36,053 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1330300415, now seen corresponding path program 36 times [2022-01-31 18:14:36,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478136877] [2022-01-31 18:14:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:36,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:36,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:36,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:36,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:36,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:36,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:36,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478136877] [2022-01-31 18:14:36,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478136877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:36,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:36,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:14:36,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685314022] [2022-01-31 18:14:36,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:14:36,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:14:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:14:36,552 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:37,000 INFO L93 Difference]: Finished difference Result 367 states and 483 transitions. [2022-01-31 18:14:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:14:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 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 158 [2022-01-31 18:14:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:37,002 INFO L225 Difference]: With dead ends: 367 [2022-01-31 18:14:37,002 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 18:14:37,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:14:37,002 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 590 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:37,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 288 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 18:14:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 167. [2022-01-31 18:14:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.2484472049689441) internal successors, (201), 161 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2022-01-31 18:14:37,009 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 158 [2022-01-31 18:14:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:37,009 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2022-01-31 18:14:37,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2022-01-31 18:14:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 18:14:37,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:37,010 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:37,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:14:37,010 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1985809892, now seen corresponding path program 37 times [2022-01-31 18:14:37,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:37,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425258232] [2022-01-31 18:14:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:37,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:37,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:37,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:37,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:37,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:37,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425258232] [2022-01-31 18:14:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425258232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:37,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:37,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:14:37,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691730271] [2022-01-31 18:14:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:37,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:14:37,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:14:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:14:37,716 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:38,153 INFO L93 Difference]: Finished difference Result 376 states and 495 transitions. [2022-01-31 18:14:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:14:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 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 162 [2022-01-31 18:14:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:38,155 INFO L225 Difference]: With dead ends: 376 [2022-01-31 18:14:38,155 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 18:14:38,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:14:38,156 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 523 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:38,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 314 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 18:14:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 171. [2022-01-31 18:14:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.2484848484848485) internal successors, (206), 165 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2022-01-31 18:14:38,162 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 162 [2022-01-31 18:14:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:38,162 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2022-01-31 18:14:38,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2022-01-31 18:14:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 18:14:38,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:38,163 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:38,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:14:38,163 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1181820087, now seen corresponding path program 38 times [2022-01-31 18:14:38,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:38,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626413311] [2022-01-31 18:14:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:38,167 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:38,167 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:38,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:38,177 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:38,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:38,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:38,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626413311] [2022-01-31 18:14:38,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1626413311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:38,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:38,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:14:38,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553916722] [2022-01-31 18:14:38,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:14:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:14:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:14:38,850 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:39,268 INFO L93 Difference]: Finished difference Result 385 states and 507 transitions. [2022-01-31 18:14:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:14:39,291 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 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 166 [2022-01-31 18:14:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:39,293 INFO L225 Difference]: With dead ends: 385 [2022-01-31 18:14:39,293 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 18:14:39,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:14:39,294 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 633 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:39,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 302 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 18:14:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 175. [2022-01-31 18:14:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 216 transitions. [2022-01-31 18:14:39,300 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 216 transitions. Word has length 166 [2022-01-31 18:14:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:39,300 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 216 transitions. [2022-01-31 18:14:39,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 216 transitions. [2022-01-31 18:14:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 18:14:39,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:39,301 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:39,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:14:39,301 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1252093486, now seen corresponding path program 39 times [2022-01-31 18:14:39,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447795681] [2022-01-31 18:14:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:39,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:39,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:39,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:39,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:39,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:39,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:39,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447795681] [2022-01-31 18:14:39,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [447795681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:39,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:39,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:14:39,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244009124] [2022-01-31 18:14:39,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:39,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:14:39,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:14:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:14:39,888 INFO L87 Difference]: Start difference. First operand 175 states and 216 transitions. Second operand has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:40,270 INFO L93 Difference]: Finished difference Result 394 states and 519 transitions. [2022-01-31 18:14:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:14:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 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 170 [2022-01-31 18:14:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:40,272 INFO L225 Difference]: With dead ends: 394 [2022-01-31 18:14:40,272 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 18:14:40,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:14:40,273 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 741 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:40,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 294 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 18:14:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 179. [2022-01-31 18:14:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.2485549132947977) internal successors, (216), 173 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions. [2022-01-31 18:14:40,278 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 170 [2022-01-31 18:14:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:40,278 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions. [2022-01-31 18:14:40,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions. [2022-01-31 18:14:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 18:14:40,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:40,279 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:40,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:14:40,279 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 414582419, now seen corresponding path program 40 times [2022-01-31 18:14:40,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370431781] [2022-01-31 18:14:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:40,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:40,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:40,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:40,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:41,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:41,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370431781] [2022-01-31 18:14:41,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370431781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:41,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:41,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:14:41,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607058724] [2022-01-31 18:14:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:41,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:14:41,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:41,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:14:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:14:41,107 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:41,562 INFO L93 Difference]: Finished difference Result 403 states and 531 transitions. [2022-01-31 18:14:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:14:41,563 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 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 174 [2022-01-31 18:14:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:41,565 INFO L225 Difference]: With dead ends: 403 [2022-01-31 18:14:41,565 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 18:14:41,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:14:41,566 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 703 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:41,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 318 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 18:14:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 183. [2022-01-31 18:14:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.2485875706214689) internal successors, (221), 177 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 226 transitions. [2022-01-31 18:14:41,572 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 226 transitions. Word has length 174 [2022-01-31 18:14:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:41,572 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 226 transitions. [2022-01-31 18:14:41,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 226 transitions. [2022-01-31 18:14:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 18:14:41,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:41,573 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:41,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:14:41,573 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash 541975672, now seen corresponding path program 41 times [2022-01-31 18:14:41,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:41,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873458901] [2022-01-31 18:14:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:41,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:41,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:41,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:41,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:42,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873458901] [2022-01-31 18:14:42,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873458901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:42,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:42,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:14:42,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855334484] [2022-01-31 18:14:42,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:42,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:14:42,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:14:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:14:42,463 INFO L87 Difference]: Start difference. First operand 183 states and 226 transitions. Second operand has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:42,955 INFO L93 Difference]: Finished difference Result 412 states and 543 transitions. [2022-01-31 18:14:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:14:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 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 178 [2022-01-31 18:14:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:42,959 INFO L225 Difference]: With dead ends: 412 [2022-01-31 18:14:42,959 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 18:14:42,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:14:42,967 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 682 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:42,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 332 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 18:14:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 187. [2022-01-31 18:14:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.2486187845303867) internal successors, (226), 181 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2022-01-31 18:14:42,975 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 178 [2022-01-31 18:14:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:42,976 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2022-01-31 18:14:42,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2022-01-31 18:14:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:14:42,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:42,977 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:42,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:14:42,977 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1152759843, now seen corresponding path program 42 times [2022-01-31 18:14:42,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:42,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088800453] [2022-01-31 18:14:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:42,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:42,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:42,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:42,994 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:44,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:44,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088800453] [2022-01-31 18:14:44,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2088800453] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:44,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:44,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:14:44,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994596544] [2022-01-31 18:14:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:44,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:14:44,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:14:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:14:44,004 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:44,555 INFO L93 Difference]: Finished difference Result 421 states and 555 transitions. [2022-01-31 18:14:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:14:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 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 182 [2022-01-31 18:14:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:44,557 INFO L225 Difference]: With dead ends: 421 [2022-01-31 18:14:44,557 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 18:14:44,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:14:44,558 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 834 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:44,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 316 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 18:14:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 191. [2022-01-31 18:14:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.2486486486486486) internal successors, (231), 185 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 236 transitions. [2022-01-31 18:14:44,563 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 236 transitions. Word has length 182 [2022-01-31 18:14:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:44,564 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 236 transitions. [2022-01-31 18:14:44,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 236 transitions. [2022-01-31 18:14:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 18:14:44,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:44,565 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:44,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:14:44,565 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash -252940094, now seen corresponding path program 43 times [2022-01-31 18:14:44,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074035745] [2022-01-31 18:14:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:44,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:44,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:44,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:44,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:45,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:45,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:45,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074035745] [2022-01-31 18:14:45,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074035745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:45,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:45,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:14:45,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557598469] [2022-01-31 18:14:45,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:45,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:14:45,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:14:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:14:45,472 INFO L87 Difference]: Start difference. First operand 191 states and 236 transitions. Second operand has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:46,070 INFO L93 Difference]: Finished difference Result 430 states and 567 transitions. [2022-01-31 18:14:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:14:46,071 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 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 186 [2022-01-31 18:14:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:46,073 INFO L225 Difference]: With dead ends: 430 [2022-01-31 18:14:46,073 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 18:14:46,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:14:46,073 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 790 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:46,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 334 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 18:14:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 195. [2022-01-31 18:14:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.2486772486772486) internal successors, (236), 189 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 241 transitions. [2022-01-31 18:14:46,081 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 241 transitions. Word has length 186 [2022-01-31 18:14:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 241 transitions. [2022-01-31 18:14:46,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 241 transitions. [2022-01-31 18:14:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:14:46,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:46,082 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:46,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:14:46,082 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:46,082 INFO L85 PathProgramCache]: Analyzing trace with hash -975855833, now seen corresponding path program 44 times [2022-01-31 18:14:46,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:46,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009020406] [2022-01-31 18:14:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:46,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:46,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:46,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:46,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:47,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:47,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009020406] [2022-01-31 18:14:47,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009020406] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:47,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:47,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:14:47,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121610219] [2022-01-31 18:14:47,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:14:47,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:14:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:14:47,089 INFO L87 Difference]: Start difference. First operand 195 states and 241 transitions. Second operand has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:47,741 INFO L93 Difference]: Finished difference Result 439 states and 579 transitions. [2022-01-31 18:14:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:14:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 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 190 [2022-01-31 18:14:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:47,744 INFO L225 Difference]: With dead ends: 439 [2022-01-31 18:14:47,744 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 18:14:47,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:14:47,744 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 771 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:47,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 341 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 18:14:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 199. [2022-01-31 18:14:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.2487046632124352) internal successors, (241), 193 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2022-01-31 18:14:47,750 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 190 [2022-01-31 18:14:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:47,750 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2022-01-31 18:14:47,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2022-01-31 18:14:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 18:14:47,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:47,751 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:47,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:14:47,751 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:47,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1945693428, now seen corresponding path program 45 times [2022-01-31 18:14:47,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:47,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826094694] [2022-01-31 18:14:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:47,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:47,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:47,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:47,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:49,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826094694] [2022-01-31 18:14:49,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [826094694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:49,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:49,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:14:49,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520464401] [2022-01-31 18:14:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:49,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:14:49,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:14:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:14:49,028 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:49,567 INFO L93 Difference]: Finished difference Result 448 states and 591 transitions. [2022-01-31 18:14:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:14:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 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 194 [2022-01-31 18:14:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:49,570 INFO L225 Difference]: With dead ends: 448 [2022-01-31 18:14:49,570 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 18:14:49,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:14:49,571 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 895 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:49,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 330 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 18:14:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 203. [2022-01-31 18:14:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.248730964467005) internal successors, (246), 197 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-01-31 18:14:49,576 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 194 [2022-01-31 18:14:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-01-31 18:14:49,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-01-31 18:14:49,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 18:14:49,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:49,578 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:49,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:14:49,578 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash 853675121, now seen corresponding path program 46 times [2022-01-31 18:14:49,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:49,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316894341] [2022-01-31 18:14:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:49,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:49,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:49,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:49,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:50,582 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316894341] [2022-01-31 18:14:50,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316894341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:50,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:50,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:14:50,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189815166] [2022-01-31 18:14:50,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:50,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:14:50,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:14:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:14:50,584 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:51,190 INFO L93 Difference]: Finished difference Result 457 states and 603 transitions. [2022-01-31 18:14:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:14:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 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 198 [2022-01-31 18:14:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:51,192 INFO L225 Difference]: With dead ends: 457 [2022-01-31 18:14:51,192 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 18:14:51,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:14:51,193 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 853 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:51,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 344 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 18:14:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 207. [2022-01-31 18:14:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.2487562189054726) internal successors, (251), 201 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2022-01-31 18:14:51,199 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 198 [2022-01-31 18:14:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:51,199 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2022-01-31 18:14:51,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2022-01-31 18:14:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 18:14:51,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:51,200 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:51,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:14:51,200 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:51,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1758999722, now seen corresponding path program 47 times [2022-01-31 18:14:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:51,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564863788] [2022-01-31 18:14:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:51,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:51,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:51,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:51,220 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:52,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:52,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:52,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564863788] [2022-01-31 18:14:52,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1564863788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:52,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:52,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:14:52,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575280723] [2022-01-31 18:14:52,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:52,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:14:52,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:52,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:14:52,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:14:52,249 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:52,858 INFO L93 Difference]: Finished difference Result 466 states and 615 transitions. [2022-01-31 18:14:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:14:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 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 202 [2022-01-31 18:14:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:52,860 INFO L225 Difference]: With dead ends: 466 [2022-01-31 18:14:52,860 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 18:14:52,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:14:52,861 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 846 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:52,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 357 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 18:14:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 211. [2022-01-31 18:14:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.248780487804878) internal successors, (256), 205 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2022-01-31 18:14:52,868 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 202 [2022-01-31 18:14:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2022-01-31 18:14:52,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2022-01-31 18:14:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:14:52,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:52,870 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:52,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:14:52,870 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:52,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:52,871 INFO L85 PathProgramCache]: Analyzing trace with hash -755396677, now seen corresponding path program 48 times [2022-01-31 18:14:52,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:52,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252465160] [2022-01-31 18:14:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:52,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:52,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:52,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:52,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:54,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:54,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:54,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252465160] [2022-01-31 18:14:54,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252465160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:54,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:54,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:14:54,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146544572] [2022-01-31 18:14:54,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:54,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:14:54,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:54,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:14:54,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:14:54,016 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:54,651 INFO L93 Difference]: Finished difference Result 475 states and 627 transitions. [2022-01-31 18:14:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:14:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 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 206 [2022-01-31 18:14:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:54,653 INFO L225 Difference]: With dead ends: 475 [2022-01-31 18:14:54,653 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 18:14:54,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:14:54,654 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 996 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:54,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 352 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 18:14:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 215. [2022-01-31 18:14:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 266 transitions. [2022-01-31 18:14:54,660 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 266 transitions. Word has length 206 [2022-01-31 18:14:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:54,660 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 266 transitions. [2022-01-31 18:14:54,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 266 transitions. [2022-01-31 18:14:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 18:14:54,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:54,661 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:54,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:14:54,661 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1915184736, now seen corresponding path program 49 times [2022-01-31 18:14:54,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:54,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737618686] [2022-01-31 18:14:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:54,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:54,666 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:54,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:54,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:55,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:55,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737618686] [2022-01-31 18:14:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737618686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:55,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:55,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:14:55,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497749846] [2022-01-31 18:14:55,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:55,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:14:55,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:14:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:14:55,816 INFO L87 Difference]: Start difference. First operand 215 states and 266 transitions. Second operand has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:56,414 INFO L93 Difference]: Finished difference Result 484 states and 639 transitions. [2022-01-31 18:14:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:14:56,415 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 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 210 [2022-01-31 18:14:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:56,416 INFO L225 Difference]: With dead ends: 484 [2022-01-31 18:14:56,416 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 18:14:56,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:14:56,417 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 948 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:56,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 366 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 18:14:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 219. [2022-01-31 18:14:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.2488262910798122) internal successors, (266), 213 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 271 transitions. [2022-01-31 18:14:56,423 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 271 transitions. Word has length 210 [2022-01-31 18:14:56,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:56,424 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 271 transitions. [2022-01-31 18:14:56,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 271 transitions. [2022-01-31 18:14:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:14:56,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:56,425 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:56,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:14:56,425 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1285957893, now seen corresponding path program 50 times [2022-01-31 18:14:56,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:56,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763725351] [2022-01-31 18:14:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:56,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:56,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:56,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:56,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:57,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:57,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:57,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763725351] [2022-01-31 18:14:57,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763725351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:57,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:57,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:14:57,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180534153] [2022-01-31 18:14:57,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:57,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:14:57,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:57,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:14:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:14:57,568 INFO L87 Difference]: Start difference. First operand 219 states and 271 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:58,262 INFO L93 Difference]: Finished difference Result 493 states and 651 transitions. [2022-01-31 18:14:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:14:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 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 214 [2022-01-31 18:14:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:58,264 INFO L225 Difference]: With dead ends: 493 [2022-01-31 18:14:58,264 INFO L226 Difference]: Without dead ends: 481 [2022-01-31 18:14:58,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:14:58,265 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 818 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:58,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 388 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-31 18:14:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 223. [2022-01-31 18:14:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.2488479262672811) internal successors, (271), 217 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:14:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 276 transitions. [2022-01-31 18:14:58,271 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 276 transitions. Word has length 214 [2022-01-31 18:14:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:58,271 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 276 transitions. [2022-01-31 18:14:58,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:14:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 276 transitions. [2022-01-31 18:14:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 18:14:58,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:58,272 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:58,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:14:58,272 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1046250006, now seen corresponding path program 51 times [2022-01-31 18:14:58,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793463722] [2022-01-31 18:14:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:58,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:58,277 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:58,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:58,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:59,451 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793463722] [2022-01-31 18:14:59,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793463722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:59,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:59,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:14:59,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925696538] [2022-01-31 18:14:59,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:59,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:14:59,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:14:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:14:59,453 INFO L87 Difference]: Start difference. First operand 223 states and 276 transitions. Second operand has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:00,114 INFO L93 Difference]: Finished difference Result 502 states and 663 transitions. [2022-01-31 18:15:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:15:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 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 218 [2022-01-31 18:15:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:00,116 INFO L225 Difference]: With dead ends: 502 [2022-01-31 18:15:00,116 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 18:15:00,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:15:00,117 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 901 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:00,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 392 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 18:15:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 227. [2022-01-31 18:15:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.248868778280543) internal successors, (276), 221 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 281 transitions. [2022-01-31 18:15:00,123 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 281 transitions. Word has length 218 [2022-01-31 18:15:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:00,124 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 281 transitions. [2022-01-31 18:15:00,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 281 transitions. [2022-01-31 18:15:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 18:15:00,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:00,125 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:00,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:15:00,125 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash 477222991, now seen corresponding path program 52 times [2022-01-31 18:15:00,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:00,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062339293] [2022-01-31 18:15:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:00,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:00,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:00,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:00,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:01,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062339293] [2022-01-31 18:15:01,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062339293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:01,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:01,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:15:01,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804074928] [2022-01-31 18:15:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:01,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:15:01,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:15:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:15:01,412 INFO L87 Difference]: Start difference. First operand 227 states and 281 transitions. Second operand has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:02,164 INFO L93 Difference]: Finished difference Result 511 states and 675 transitions. [2022-01-31 18:15:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:15:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 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 222 [2022-01-31 18:15:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:02,167 INFO L225 Difference]: With dead ends: 511 [2022-01-31 18:15:02,167 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 18:15:02,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:15:02,169 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 962 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:02,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 394 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:02,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 18:15:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 231. [2022-01-31 18:15:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.248888888888889) internal successors, (281), 225 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2022-01-31 18:15:02,176 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 222 [2022-01-31 18:15:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:02,176 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2022-01-31 18:15:02,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2022-01-31 18:15:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 18:15:02,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:02,177 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:02,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:15:02,177 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1511159860, now seen corresponding path program 53 times [2022-01-31 18:15:02,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042064029] [2022-01-31 18:15:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:02,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:02,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:02,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:02,200 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:03,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:03,442 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042064029] [2022-01-31 18:15:03,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042064029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:03,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:03,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:15:03,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032866273] [2022-01-31 18:15:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:03,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:15:03,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:15:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:15:03,444 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:04,264 INFO L93 Difference]: Finished difference Result 520 states and 687 transitions. [2022-01-31 18:15:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:15:04,265 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 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 226 [2022-01-31 18:15:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:04,267 INFO L225 Difference]: With dead ends: 520 [2022-01-31 18:15:04,267 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 18:15:04,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:15:04,268 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1212 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:04,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 393 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:04,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 18:15:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 235. [2022-01-31 18:15:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.2489082969432315) internal successors, (286), 229 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 291 transitions. [2022-01-31 18:15:04,274 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 291 transitions. Word has length 226 [2022-01-31 18:15:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:04,274 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 291 transitions. [2022-01-31 18:15:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 291 transitions. [2022-01-31 18:15:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 18:15:04,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:04,275 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:04,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:15:04,276 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1796825703, now seen corresponding path program 54 times [2022-01-31 18:15:04,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:04,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259024602] [2022-01-31 18:15:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:04,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:04,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:04,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:04,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:05,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:05,579 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:05,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259024602] [2022-01-31 18:15:05,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259024602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:05,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:05,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:15:05,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382985040] [2022-01-31 18:15:05,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:05,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:15:05,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:15:05,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:15:05,581 INFO L87 Difference]: Start difference. First operand 235 states and 291 transitions. Second operand has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:06,367 INFO L93 Difference]: Finished difference Result 529 states and 699 transitions. [2022-01-31 18:15:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:15:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 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 230 [2022-01-31 18:15:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:06,369 INFO L225 Difference]: With dead ends: 529 [2022-01-31 18:15:06,369 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 18:15:06,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:15:06,370 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 873 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:06,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 407 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 18:15:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 239. [2022-01-31 18:15:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.2489270386266094) internal successors, (291), 233 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-01-31 18:15:06,377 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 230 [2022-01-31 18:15:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:06,377 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-01-31 18:15:06,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-01-31 18:15:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 18:15:06,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:06,378 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:06,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:15:06,378 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1420789886, now seen corresponding path program 55 times [2022-01-31 18:15:06,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230525902] [2022-01-31 18:15:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:06,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:06,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:06,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:06,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:07,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:07,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230525902] [2022-01-31 18:15:07,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230525902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:07,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:07,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:15:07,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222476755] [2022-01-31 18:15:07,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:07,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:15:07,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:15:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:15:07,714 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:08,532 INFO L93 Difference]: Finished difference Result 538 states and 711 transitions. [2022-01-31 18:15:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:15:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 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 234 [2022-01-31 18:15:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:08,534 INFO L225 Difference]: With dead ends: 538 [2022-01-31 18:15:08,534 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 18:15:08,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:15:08,535 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 953 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:08,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 421 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 18:15:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 243. [2022-01-31 18:15:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.248945147679325) internal successors, (296), 237 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2022-01-31 18:15:08,541 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 234 [2022-01-31 18:15:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:08,542 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2022-01-31 18:15:08,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2022-01-31 18:15:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 18:15:08,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:08,543 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:08,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:15:08,543 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -561088285, now seen corresponding path program 56 times [2022-01-31 18:15:08,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:08,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764884318] [2022-01-31 18:15:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:08,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:08,548 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:08,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:08,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:09,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764884318] [2022-01-31 18:15:09,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [764884318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:09,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:09,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:15:09,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965097392] [2022-01-31 18:15:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:15:09,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:15:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:15:09,932 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:10,708 INFO L93 Difference]: Finished difference Result 547 states and 723 transitions. [2022-01-31 18:15:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:15:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 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 238 [2022-01-31 18:15:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:10,711 INFO L225 Difference]: With dead ends: 547 [2022-01-31 18:15:10,711 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 18:15:10,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:15:10,712 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1010 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:10,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 418 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 18:15:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 247. [2022-01-31 18:15:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.2489626556016598) internal successors, (301), 241 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2022-01-31 18:15:10,718 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 238 [2022-01-31 18:15:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:10,718 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2022-01-31 18:15:10,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2022-01-31 18:15:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 18:15:10,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:10,719 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:10,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:15:10,720 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2063290680, now seen corresponding path program 57 times [2022-01-31 18:15:10,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:10,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000350561] [2022-01-31 18:15:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:10,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:10,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:10,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:10,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:12,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:12,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000350561] [2022-01-31 18:15:12,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000350561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:12,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:12,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:15:12,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416084100] [2022-01-31 18:15:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:12,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:15:12,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:15:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:15:12,204 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:12,995 INFO L93 Difference]: Finished difference Result 556 states and 735 transitions. [2022-01-31 18:15:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:15:12,996 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 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 242 [2022-01-31 18:15:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:12,998 INFO L225 Difference]: With dead ends: 556 [2022-01-31 18:15:12,998 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 18:15:12,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:15:12,999 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1026 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:12,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 418 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 18:15:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 251. [2022-01-31 18:15:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2489795918367348) internal successors, (306), 245 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 311 transitions. [2022-01-31 18:15:13,005 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 311 transitions. Word has length 242 [2022-01-31 18:15:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:13,006 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 311 transitions. [2022-01-31 18:15:13,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 311 transitions. [2022-01-31 18:15:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 18:15:13,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:13,007 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:13,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:15:13,007 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash -135042515, now seen corresponding path program 58 times [2022-01-31 18:15:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924570558] [2022-01-31 18:15:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:13,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:13,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:13,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:13,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:14,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924570558] [2022-01-31 18:15:14,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924570558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:14,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:14,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:15:14,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181677024] [2022-01-31 18:15:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:14,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:15:14,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:15:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:15:14,605 INFO L87 Difference]: Start difference. First operand 251 states and 311 transitions. Second operand has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:15,406 INFO L93 Difference]: Finished difference Result 565 states and 747 transitions. [2022-01-31 18:15:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:15:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 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 246 [2022-01-31 18:15:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:15,409 INFO L225 Difference]: With dead ends: 565 [2022-01-31 18:15:15,409 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 18:15:15,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:15:15,410 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1126 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:15,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 436 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:15,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 18:15:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 255. [2022-01-31 18:15:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.248995983935743) internal successors, (311), 249 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 316 transitions. [2022-01-31 18:15:15,418 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 316 transitions. Word has length 246 [2022-01-31 18:15:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:15,418 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 316 transitions. [2022-01-31 18:15:15,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 316 transitions. [2022-01-31 18:15:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 18:15:15,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:15,419 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:15,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:15:15,419 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:15,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1801721070, now seen corresponding path program 59 times [2022-01-31 18:15:15,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929463349] [2022-01-31 18:15:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:15,424 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:15,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:15,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:15,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:17,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:17,178 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929463349] [2022-01-31 18:15:17,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [929463349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:17,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:17,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:15:17,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271151161] [2022-01-31 18:15:17,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:17,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:15:17,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:15:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:15:17,180 INFO L87 Difference]: Start difference. First operand 255 states and 316 transitions. Second operand has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:17,990 INFO L93 Difference]: Finished difference Result 574 states and 759 transitions. [2022-01-31 18:15:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:15:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 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 250 [2022-01-31 18:15:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:17,993 INFO L225 Difference]: With dead ends: 574 [2022-01-31 18:15:17,993 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 18:15:17,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:15:18,001 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1106 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:18,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1166 Valid, 431 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 18:15:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 259. [2022-01-31 18:15:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.2490118577075098) internal successors, (316), 253 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 321 transitions. [2022-01-31 18:15:18,021 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 321 transitions. Word has length 250 [2022-01-31 18:15:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:18,021 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 321 transitions. [2022-01-31 18:15:18,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 321 transitions. [2022-01-31 18:15:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 18:15:18,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:18,037 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:18,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:15:18,038 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1247841929, now seen corresponding path program 60 times [2022-01-31 18:15:18,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:18,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474370800] [2022-01-31 18:15:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:18,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:18,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:18,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:18,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:19,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:19,790 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:19,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474370800] [2022-01-31 18:15:19,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [474370800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:19,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:19,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:15:19,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610291135] [2022-01-31 18:15:19,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:19,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:15:19,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:15:19,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:15:19,809 INFO L87 Difference]: Start difference. First operand 259 states and 321 transitions. Second operand has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:20,545 INFO L93 Difference]: Finished difference Result 583 states and 771 transitions. [2022-01-31 18:15:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:15:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 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 254 [2022-01-31 18:15:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:20,561 INFO L225 Difference]: With dead ends: 583 [2022-01-31 18:15:20,561 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 18:15:20,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:15:20,566 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1149 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:20,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 457 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:15:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 18:15:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 263. [2022-01-31 18:15:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.2490272373540856) internal successors, (321), 257 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 326 transitions. [2022-01-31 18:15:20,611 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 326 transitions. Word has length 254 [2022-01-31 18:15:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:20,611 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 326 transitions. [2022-01-31 18:15:20,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 326 transitions. [2022-01-31 18:15:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 18:15:20,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:20,615 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:15:20,615 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash 50281820, now seen corresponding path program 61 times [2022-01-31 18:15:20,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275527492] [2022-01-31 18:15:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:20,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:20,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:20,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:20,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:21,787 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275527492] [2022-01-31 18:15:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [275527492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:21,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:21,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:15:21,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364416513] [2022-01-31 18:15:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:21,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:15:21,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:15:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:15:21,789 INFO L87 Difference]: Start difference. First operand 263 states and 326 transitions. Second operand has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:22,453 INFO L93 Difference]: Finished difference Result 592 states and 783 transitions. [2022-01-31 18:15:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:15:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 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 258 [2022-01-31 18:15:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:22,455 INFO L225 Difference]: With dead ends: 592 [2022-01-31 18:15:22,455 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 18:15:22,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:15:22,456 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1091 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:22,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 469 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:15:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 18:15:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 267. [2022-01-31 18:15:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.2490421455938698) internal successors, (326), 261 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 331 transitions. [2022-01-31 18:15:22,463 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 331 transitions. Word has length 258 [2022-01-31 18:15:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 331 transitions. [2022-01-31 18:15:22,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 331 transitions. [2022-01-31 18:15:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 18:15:22,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:22,464 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:22,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:15:22,464 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1038315839, now seen corresponding path program 62 times [2022-01-31 18:15:22,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:22,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788228957] [2022-01-31 18:15:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:22,472 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:22,472 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:22,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:22,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:23,696 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788228957] [2022-01-31 18:15:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788228957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:23,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:23,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:15:23,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851566108] [2022-01-31 18:15:23,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:15:23,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:15:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:15:23,698 INFO L87 Difference]: Start difference. First operand 267 states and 331 transitions. Second operand has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:24,474 INFO L93 Difference]: Finished difference Result 601 states and 795 transitions. [2022-01-31 18:15:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:15:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 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 262 [2022-01-31 18:15:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:24,477 INFO L225 Difference]: With dead ends: 601 [2022-01-31 18:15:24,477 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 18:15:24,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:15:24,477 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1121 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:24,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 461 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:15:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 18:15:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 271. [2022-01-31 18:15:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.2490566037735849) internal successors, (331), 265 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 336 transitions. [2022-01-31 18:15:24,489 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 336 transitions. Word has length 262 [2022-01-31 18:15:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:24,490 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 336 transitions. [2022-01-31 18:15:24,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 336 transitions. [2022-01-31 18:15:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 18:15:24,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:24,491 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:24,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:15:24,491 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash 632858022, now seen corresponding path program 63 times [2022-01-31 18:15:24,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:24,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850472242] [2022-01-31 18:15:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:24,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:24,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:24,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:24,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:25,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850472242] [2022-01-31 18:15:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [850472242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:25,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:25,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:15:25,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722076940] [2022-01-31 18:15:25,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:15:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:15:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:15:25,679 INFO L87 Difference]: Start difference. First operand 271 states and 336 transitions. Second operand has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:26,549 INFO L93 Difference]: Finished difference Result 610 states and 807 transitions. [2022-01-31 18:15:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:15:26,550 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 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 266 [2022-01-31 18:15:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:26,552 INFO L225 Difference]: With dead ends: 610 [2022-01-31 18:15:26,552 INFO L226 Difference]: Without dead ends: 598 [2022-01-31 18:15:26,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:15:26,552 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1177 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:26,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 466 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-31 18:15:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 275. [2022-01-31 18:15:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.2490706319702602) internal successors, (336), 269 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 341 transitions. [2022-01-31 18:15:26,577 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 341 transitions. Word has length 266 [2022-01-31 18:15:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:26,578 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 341 transitions. [2022-01-31 18:15:26,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 341 transitions. [2022-01-31 18:15:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 18:15:26,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:26,579 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:15:26,579 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1644903925, now seen corresponding path program 64 times [2022-01-31 18:15:26,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:26,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738277509] [2022-01-31 18:15:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:26,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:26,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:26,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:26,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:28,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738277509] [2022-01-31 18:15:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1738277509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:28,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:28,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:15:28,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757771129] [2022-01-31 18:15:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:28,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:15:28,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:15:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:15:28,466 INFO L87 Difference]: Start difference. First operand 275 states and 341 transitions. Second operand has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:29,572 INFO L93 Difference]: Finished difference Result 619 states and 819 transitions. [2022-01-31 18:15:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:15:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 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 270 [2022-01-31 18:15:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:29,574 INFO L225 Difference]: With dead ends: 619 [2022-01-31 18:15:29,574 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 18:15:29,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:15:29,575 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1393 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:29,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 460 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 18:15:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 279. [2022-01-31 18:15:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.249084249084249) internal successors, (341), 273 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 346 transitions. [2022-01-31 18:15:29,582 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 346 transitions. Word has length 270 [2022-01-31 18:15:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:29,582 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 346 transitions. [2022-01-31 18:15:29,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 346 transitions. [2022-01-31 18:15:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 18:15:29,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:29,583 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:29,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:15:29,583 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 676471792, now seen corresponding path program 65 times [2022-01-31 18:15:29,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261239625] [2022-01-31 18:15:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:29,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:29,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:29,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:29,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:31,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261239625] [2022-01-31 18:15:31,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [261239625] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:31,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:31,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:15:31,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865039374] [2022-01-31 18:15:31,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:31,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:15:31,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:15:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:15:31,438 INFO L87 Difference]: Start difference. First operand 279 states and 346 transitions. Second operand has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:32,653 INFO L93 Difference]: Finished difference Result 628 states and 831 transitions. [2022-01-31 18:15:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:15:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 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 274 [2022-01-31 18:15:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:32,656 INFO L225 Difference]: With dead ends: 628 [2022-01-31 18:15:32,656 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 18:15:32,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:15:32,658 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1566 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:32,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 477 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:15:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 18:15:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 283. [2022-01-31 18:15:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.2490974729241877) internal successors, (346), 277 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 351 transitions. [2022-01-31 18:15:32,680 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 351 transitions. Word has length 274 [2022-01-31 18:15:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:32,680 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 351 transitions. [2022-01-31 18:15:32,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 351 transitions. [2022-01-31 18:15:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 18:15:32,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:32,681 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:32,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:15:32,682 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:32,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1615721643, now seen corresponding path program 66 times [2022-01-31 18:15:32,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:32,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336385981] [2022-01-31 18:15:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:32,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:32,707 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:32,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:32,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:35,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:35,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336385981] [2022-01-31 18:15:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336385981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:35,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:15:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463090624] [2022-01-31 18:15:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:35,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:15:35,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:15:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:15:35,458 INFO L87 Difference]: Start difference. First operand 283 states and 351 transitions. Second operand has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:36,551 INFO L93 Difference]: Finished difference Result 637 states and 843 transitions. [2022-01-31 18:15:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:15:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 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 278 [2022-01-31 18:15:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:36,555 INFO L225 Difference]: With dead ends: 637 [2022-01-31 18:15:36,555 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 18:15:36,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:15:36,558 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1183 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:36,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 497 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 18:15:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 287. [2022-01-31 18:15:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.2491103202846976) internal successors, (351), 281 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2022-01-31 18:15:36,581 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 278 [2022-01-31 18:15:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:36,581 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2022-01-31 18:15:36,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2022-01-31 18:15:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 18:15:36,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:36,583 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:15:36,583 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash 206944314, now seen corresponding path program 67 times [2022-01-31 18:15:36,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:36,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674743943] [2022-01-31 18:15:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:36,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:36,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:36,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:36,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:38,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:38,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:38,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674743943] [2022-01-31 18:15:38,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674743943] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:38,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:38,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:15:38,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633945116] [2022-01-31 18:15:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:38,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:15:38,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:15:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:15:38,607 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:39,660 INFO L93 Difference]: Finished difference Result 646 states and 855 transitions. [2022-01-31 18:15:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:15:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 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 282 [2022-01-31 18:15:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:39,663 INFO L225 Difference]: With dead ends: 646 [2022-01-31 18:15:39,663 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 18:15:39,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:15:39,679 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1396 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:39,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 491 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 18:15:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 291. [2022-01-31 18:15:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.249122807017544) internal successors, (356), 285 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 361 transitions. [2022-01-31 18:15:39,688 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 361 transitions. Word has length 282 [2022-01-31 18:15:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:39,688 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 361 transitions. [2022-01-31 18:15:39,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 361 transitions. [2022-01-31 18:15:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 18:15:39,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:39,703 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:39,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:15:39,704 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash -203527521, now seen corresponding path program 68 times [2022-01-31 18:15:39,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:39,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474905779] [2022-01-31 18:15:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:39,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:39,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:39,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:39,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:41,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:41,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474905779] [2022-01-31 18:15:41,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474905779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:41,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:41,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:15:41,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370152553] [2022-01-31 18:15:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:41,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:15:41,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:15:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:15:41,779 INFO L87 Difference]: Start difference. First operand 291 states and 361 transitions. Second operand has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:42,955 INFO L93 Difference]: Finished difference Result 655 states and 867 transitions. [2022-01-31 18:15:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:15:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 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 286 [2022-01-31 18:15:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:42,957 INFO L225 Difference]: With dead ends: 655 [2022-01-31 18:15:42,957 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 18:15:42,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:15:42,958 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1215 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:42,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 492 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 18:15:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 295. [2022-01-31 18:15:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2491349480968859) internal successors, (361), 289 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 366 transitions. [2022-01-31 18:15:42,973 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 366 transitions. Word has length 286 [2022-01-31 18:15:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 366 transitions. [2022-01-31 18:15:42,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 366 transitions. [2022-01-31 18:15:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 18:15:42,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:42,974 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:42,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:15:42,974 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1454546300, now seen corresponding path program 69 times [2022-01-31 18:15:42,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:42,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557906337] [2022-01-31 18:15:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:42,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:42,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:42,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:43,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:45,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:45,140 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:45,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557906337] [2022-01-31 18:15:45,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557906337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:45,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:45,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:15:45,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452476306] [2022-01-31 18:15:45,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:15:45,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:15:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:15:45,143 INFO L87 Difference]: Start difference. First operand 295 states and 366 transitions. Second operand has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:46,197 INFO L93 Difference]: Finished difference Result 664 states and 879 transitions. [2022-01-31 18:15:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:15:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 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 290 [2022-01-31 18:15:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:46,200 INFO L225 Difference]: With dead ends: 664 [2022-01-31 18:15:46,200 INFO L226 Difference]: Without dead ends: 652 [2022-01-31 18:15:46,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:15:46,201 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1395 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:46,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 511 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-31 18:15:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 299. [2022-01-31 18:15:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 293 states have (on average 1.2491467576791808) internal successors, (366), 293 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 371 transitions. [2022-01-31 18:15:46,210 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 371 transitions. Word has length 290 [2022-01-31 18:15:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:46,210 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 371 transitions. [2022-01-31 18:15:46,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 371 transitions. [2022-01-31 18:15:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 18:15:46,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:46,212 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:46,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:15:46,212 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:46,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1660690455, now seen corresponding path program 70 times [2022-01-31 18:15:46,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:46,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317873805] [2022-01-31 18:15:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:46,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:46,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:46,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:46,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:48,081 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317873805] [2022-01-31 18:15:48,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317873805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:48,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:48,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:15:48,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124051789] [2022-01-31 18:15:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:48,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:15:48,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:15:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:15:48,099 INFO L87 Difference]: Start difference. First operand 299 states and 371 transitions. Second operand has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:49,311 INFO L93 Difference]: Finished difference Result 673 states and 891 transitions. [2022-01-31 18:15:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:15:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 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 294 [2022-01-31 18:15:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:49,320 INFO L225 Difference]: With dead ends: 673 [2022-01-31 18:15:49,321 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 18:15:49,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:15:49,322 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1500 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:49,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 501 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:15:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 18:15:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 303. [2022-01-31 18:15:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.2491582491582491) internal successors, (371), 297 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 376 transitions. [2022-01-31 18:15:49,329 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 376 transitions. Word has length 294 [2022-01-31 18:15:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:49,330 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 376 transitions. [2022-01-31 18:15:49,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 376 transitions. [2022-01-31 18:15:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 18:15:49,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:49,331 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:15:49,331 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1396497714, now seen corresponding path program 71 times [2022-01-31 18:15:49,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:49,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461153243] [2022-01-31 18:15:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:49,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:49,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:49,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:49,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:51,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:51,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:51,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461153243] [2022-01-31 18:15:51,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461153243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:51,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:51,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:15:51,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614297613] [2022-01-31 18:15:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:51,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:15:51,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:15:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:15:51,345 INFO L87 Difference]: Start difference. First operand 303 states and 376 transitions. Second operand has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:52,335 INFO L93 Difference]: Finished difference Result 682 states and 903 transitions. [2022-01-31 18:15:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:15:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 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 298 [2022-01-31 18:15:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:52,338 INFO L225 Difference]: With dead ends: 682 [2022-01-31 18:15:52,338 INFO L226 Difference]: Without dead ends: 670 [2022-01-31 18:15:52,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:15:52,339 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1357 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:52,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 526 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:15:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-31 18:15:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 307. [2022-01-31 18:15:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.2491694352159468) internal successors, (376), 301 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 381 transitions. [2022-01-31 18:15:52,346 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 381 transitions. Word has length 298 [2022-01-31 18:15:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:52,346 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 381 transitions. [2022-01-31 18:15:52,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 381 transitions. [2022-01-31 18:15:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 18:15:52,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:52,347 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:52,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:15:52,348 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1940679475, now seen corresponding path program 72 times [2022-01-31 18:15:52,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:52,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425334124] [2022-01-31 18:15:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:52,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:52,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:52,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:52,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:53,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:53,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425334124] [2022-01-31 18:15:53,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425334124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:53,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:53,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:15:53,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074161941] [2022-01-31 18:15:53,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:53,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:15:53,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:15:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:15:53,796 INFO L87 Difference]: Start difference. First operand 307 states and 381 transitions. Second operand has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:54,992 INFO L93 Difference]: Finished difference Result 691 states and 915 transitions. [2022-01-31 18:15:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:15:54,992 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 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 302 [2022-01-31 18:15:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:55,002 INFO L225 Difference]: With dead ends: 691 [2022-01-31 18:15:55,002 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 18:15:55,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:15:55,005 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1280 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:55,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 532 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 18:15:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 311. [2022-01-31 18:15:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.2491803278688525) internal successors, (381), 305 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 386 transitions. [2022-01-31 18:15:55,069 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 386 transitions. Word has length 302 [2022-01-31 18:15:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:55,069 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 386 transitions. [2022-01-31 18:15:55,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 386 transitions. [2022-01-31 18:15:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 18:15:55,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:55,071 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:55,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:15:55,071 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1707017960, now seen corresponding path program 73 times [2022-01-31 18:15:55,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:55,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340247562] [2022-01-31 18:15:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:55,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:55,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:55,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:55,118 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:56,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:56,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340247562] [2022-01-31 18:15:56,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340247562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:56,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:56,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:15:56,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824584909] [2022-01-31 18:15:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:56,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:15:56,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:15:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:15:56,590 INFO L87 Difference]: Start difference. First operand 311 states and 386 transitions. Second operand has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:57,789 INFO L93 Difference]: Finished difference Result 700 states and 927 transitions. [2022-01-31 18:15:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:15:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 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 306 [2022-01-31 18:15:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:57,791 INFO L225 Difference]: With dead ends: 700 [2022-01-31 18:15:57,791 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 18:15:57,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:15:57,792 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1646 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:57,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 530 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 18:15:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 315. [2022-01-31 18:15:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.249190938511327) internal successors, (386), 309 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:15:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 391 transitions. [2022-01-31 18:15:57,799 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 391 transitions. Word has length 306 [2022-01-31 18:15:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:57,800 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 391 transitions. [2022-01-31 18:15:57,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:15:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 391 transitions. [2022-01-31 18:15:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 18:15:57,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:57,801 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:57,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:15:57,801 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash 643959933, now seen corresponding path program 74 times [2022-01-31 18:15:57,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:57,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881358665] [2022-01-31 18:15:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:57,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:57,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:57,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:57,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:59,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:59,582 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881358665] [2022-01-31 18:15:59,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881358665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:59,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:59,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:15:59,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766285616] [2022-01-31 18:15:59,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:59,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:15:59,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:15:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:15:59,584 INFO L87 Difference]: Start difference. First operand 315 states and 391 transitions. Second operand has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:00,625 INFO L93 Difference]: Finished difference Result 709 states and 939 transitions. [2022-01-31 18:16:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:16:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 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 310 [2022-01-31 18:16:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:00,627 INFO L225 Difference]: With dead ends: 709 [2022-01-31 18:16:00,627 INFO L226 Difference]: Without dead ends: 697 [2022-01-31 18:16:00,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:16:00,628 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1559 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:00,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 Valid, 541 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:16:00,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-01-31 18:16:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 319. [2022-01-31 18:16:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 313 states have (on average 1.2492012779552715) internal successors, (391), 313 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 396 transitions. [2022-01-31 18:16:00,635 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 396 transitions. Word has length 310 [2022-01-31 18:16:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:00,635 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 396 transitions. [2022-01-31 18:16:00,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 396 transitions. [2022-01-31 18:16:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-01-31 18:16:00,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:00,637 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:00,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:16:00,637 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -883890846, now seen corresponding path program 75 times [2022-01-31 18:16:00,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:00,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091709143] [2022-01-31 18:16:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:00,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:00,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:00,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:00,678 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:02,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:02,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091709143] [2022-01-31 18:16:02,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091709143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:02,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:02,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:16:02,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077904974] [2022-01-31 18:16:02,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:02,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:16:02,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:16:02,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:16:02,746 INFO L87 Difference]: Start difference. First operand 319 states and 396 transitions. Second operand has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:04,202 INFO L93 Difference]: Finished difference Result 718 states and 951 transitions. [2022-01-31 18:16:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:16:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 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 314 [2022-01-31 18:16:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:04,204 INFO L225 Difference]: With dead ends: 718 [2022-01-31 18:16:04,204 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 18:16:04,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:16:04,204 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1481 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:04,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 543 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 18:16:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 323. [2022-01-31 18:16:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 317 states have (on average 1.249211356466877) internal successors, (396), 317 states have internal predecessors, (396), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2022-01-31 18:16:04,212 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 314 [2022-01-31 18:16:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:04,212 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2022-01-31 18:16:04,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2022-01-31 18:16:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 18:16:04,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:04,214 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:04,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:16:04,214 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash 967754695, now seen corresponding path program 76 times [2022-01-31 18:16:04,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:04,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771455296] [2022-01-31 18:16:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:04,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:04,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:04,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:04,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:06,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:06,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:06,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771455296] [2022-01-31 18:16:06,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [771455296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:06,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:06,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:16:06,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418573269] [2022-01-31 18:16:06,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:06,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:16:06,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:16:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:16:06,052 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:07,383 INFO L93 Difference]: Finished difference Result 727 states and 963 transitions. [2022-01-31 18:16:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:16:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 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 318 [2022-01-31 18:16:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:07,385 INFO L225 Difference]: With dead ends: 727 [2022-01-31 18:16:07,385 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 18:16:07,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:16:07,386 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1676 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:07,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 562 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:16:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 18:16:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 327. [2022-01-31 18:16:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 321 states have (on average 1.249221183800623) internal successors, (401), 321 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 406 transitions. [2022-01-31 18:16:07,402 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 406 transitions. Word has length 318 [2022-01-31 18:16:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:07,402 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 406 transitions. [2022-01-31 18:16:07,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 406 transitions. [2022-01-31 18:16:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-31 18:16:07,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:07,404 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:07,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:16:07,404 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1870456748, now seen corresponding path program 77 times [2022-01-31 18:16:07,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258953334] [2022-01-31 18:16:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:07,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:07,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:07,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:07,454 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:09,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:09,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:09,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258953334] [2022-01-31 18:16:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [258953334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:09,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:09,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:16:09,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160817081] [2022-01-31 18:16:09,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:09,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:16:09,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:16:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:16:09,477 INFO L87 Difference]: Start difference. First operand 327 states and 406 transitions. Second operand has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:10,727 INFO L93 Difference]: Finished difference Result 736 states and 975 transitions. [2022-01-31 18:16:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:16:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 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 322 [2022-01-31 18:16:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:10,729 INFO L225 Difference]: With dead ends: 736 [2022-01-31 18:16:10,729 INFO L226 Difference]: Without dead ends: 724 [2022-01-31 18:16:10,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:16:10,730 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1572 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:10,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1650 Valid, 549 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:16:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-31 18:16:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 331. [2022-01-31 18:16:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.2492307692307691) internal successors, (406), 325 states have internal predecessors, (406), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 411 transitions. [2022-01-31 18:16:10,745 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 411 transitions. Word has length 322 [2022-01-31 18:16:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:10,745 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 411 transitions. [2022-01-31 18:16:10,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:10,746 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 411 transitions. [2022-01-31 18:16:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 18:16:10,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:10,747 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:10,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:16:10,747 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 136089873, now seen corresponding path program 78 times [2022-01-31 18:16:10,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:10,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591186682] [2022-01-31 18:16:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:10,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:10,753 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:10,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:10,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:13,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:13,286 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591186682] [2022-01-31 18:16:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [591186682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:13,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:13,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:16:13,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958953412] [2022-01-31 18:16:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:13,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:16:13,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:16:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:16:13,288 INFO L87 Difference]: Start difference. First operand 331 states and 411 transitions. Second operand has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:14,764 INFO L93 Difference]: Finished difference Result 745 states and 987 transitions. [2022-01-31 18:16:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:16:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 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 326 [2022-01-31 18:16:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:14,766 INFO L225 Difference]: With dead ends: 745 [2022-01-31 18:16:14,766 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 18:16:14,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:16:14,766 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1577 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:14,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1656 Valid, 568 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [612 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:16:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 18:16:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 335. [2022-01-31 18:16:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.249240121580547) internal successors, (411), 329 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 416 transitions. [2022-01-31 18:16:14,775 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 416 transitions. Word has length 326 [2022-01-31 18:16:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:14,775 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 416 transitions. [2022-01-31 18:16:14,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 416 transitions. [2022-01-31 18:16:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 18:16:14,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:14,785 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:14,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:16:14,785 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1940979722, now seen corresponding path program 79 times [2022-01-31 18:16:14,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:14,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265463814] [2022-01-31 18:16:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:14,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:14,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:14,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:14,837 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:17,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:17,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265463814] [2022-01-31 18:16:17,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265463814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:17,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:17,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:16:17,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485893047] [2022-01-31 18:16:17,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:17,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:16:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:16:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:16:17,471 INFO L87 Difference]: Start difference. First operand 335 states and 416 transitions. Second operand has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:18,774 INFO L93 Difference]: Finished difference Result 754 states and 999 transitions. [2022-01-31 18:16:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:16:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 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 330 [2022-01-31 18:16:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:18,776 INFO L225 Difference]: With dead ends: 754 [2022-01-31 18:16:18,776 INFO L226 Difference]: Without dead ends: 742 [2022-01-31 18:16:18,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:16:18,777 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1323 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:18,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 593 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:16:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-31 18:16:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 339. [2022-01-31 18:16:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 333 states have (on average 1.2492492492492493) internal successors, (416), 333 states have internal predecessors, (416), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2022-01-31 18:16:18,785 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 330 [2022-01-31 18:16:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:18,785 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2022-01-31 18:16:18,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2022-01-31 18:16:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 18:16:18,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:18,786 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:16:18,787 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1036684197, now seen corresponding path program 80 times [2022-01-31 18:16:18,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470977403] [2022-01-31 18:16:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:18,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:18,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:18,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:18,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:20,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:20,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:20,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470977403] [2022-01-31 18:16:20,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [470977403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:20,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:20,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:16:20,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951400027] [2022-01-31 18:16:20,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:20,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:16:20,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:20,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:16:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:16:20,878 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:22,401 INFO L93 Difference]: Finished difference Result 763 states and 1011 transitions. [2022-01-31 18:16:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:16:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 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 334 [2022-01-31 18:16:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:22,403 INFO L225 Difference]: With dead ends: 763 [2022-01-31 18:16:22,403 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 18:16:22,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:16:22,403 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1751 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:22,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 575 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 18:16:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 343. [2022-01-31 18:16:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 337 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 426 transitions. [2022-01-31 18:16:22,414 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 426 transitions. Word has length 334 [2022-01-31 18:16:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 426 transitions. [2022-01-31 18:16:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 426 transitions. [2022-01-31 18:16:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-31 18:16:22,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:22,419 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:16:22,419 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -45011392, now seen corresponding path program 81 times [2022-01-31 18:16:22,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:22,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748937783] [2022-01-31 18:16:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:22,423 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:22,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:22,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:22,473 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:24,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748937783] [2022-01-31 18:16:24,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748937783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:24,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:24,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:16:24,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922052870] [2022-01-31 18:16:24,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:24,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:16:24,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:16:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:16:24,654 INFO L87 Difference]: Start difference. First operand 343 states and 426 transitions. Second operand has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:26,183 INFO L93 Difference]: Finished difference Result 772 states and 1023 transitions. [2022-01-31 18:16:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:16:26,183 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 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 338 [2022-01-31 18:16:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:26,185 INFO L225 Difference]: With dead ends: 772 [2022-01-31 18:16:26,185 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 18:16:26,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:16:26,186 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1567 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:26,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 589 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:16:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 18:16:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 347. [2022-01-31 18:16:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 341 states have (on average 1.249266862170088) internal successors, (426), 341 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 431 transitions. [2022-01-31 18:16:26,194 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 431 transitions. Word has length 338 [2022-01-31 18:16:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:26,195 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 431 transitions. [2022-01-31 18:16:26,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 431 transitions. [2022-01-31 18:16:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 18:16:26,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:26,196 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:26,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:16:26,196 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1854107045, now seen corresponding path program 82 times [2022-01-31 18:16:26,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:26,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931033111] [2022-01-31 18:16:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:26,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:26,200 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:26,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:26,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:28,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931033111] [2022-01-31 18:16:28,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [931033111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:28,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:28,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:16:28,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429547457] [2022-01-31 18:16:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:28,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:16:28,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:16:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:16:28,607 INFO L87 Difference]: Start difference. First operand 347 states and 431 transitions. Second operand has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:30,085 INFO L93 Difference]: Finished difference Result 781 states and 1035 transitions. [2022-01-31 18:16:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:16:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 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 342 [2022-01-31 18:16:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:30,092 INFO L225 Difference]: With dead ends: 781 [2022-01-31 18:16:30,092 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 18:16:30,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:16:30,093 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1355 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:30,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 605 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:16:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 18:16:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 351. [2022-01-31 18:16:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.2492753623188406) internal successors, (431), 345 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 436 transitions. [2022-01-31 18:16:30,102 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 436 transitions. Word has length 342 [2022-01-31 18:16:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:30,102 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 436 transitions. [2022-01-31 18:16:30,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 436 transitions. [2022-01-31 18:16:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-31 18:16:30,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:30,104 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:16:30,104 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1947038346, now seen corresponding path program 83 times [2022-01-31 18:16:30,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:30,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576040863] [2022-01-31 18:16:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:30,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:30,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:30,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:30,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:32,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:32,693 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:32,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576040863] [2022-01-31 18:16:32,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576040863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:32,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:32,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:16:32,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775592349] [2022-01-31 18:16:32,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:16:32,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:16:32,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:16:32,695 INFO L87 Difference]: Start difference. First operand 351 states and 436 transitions. Second operand has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:34,639 INFO L93 Difference]: Finished difference Result 790 states and 1047 transitions. [2022-01-31 18:16:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:16:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 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 346 [2022-01-31 18:16:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:34,643 INFO L225 Difference]: With dead ends: 790 [2022-01-31 18:16:34,643 INFO L226 Difference]: Without dead ends: 778 [2022-01-31 18:16:34,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:16:34,644 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1609 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:34,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 587 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-31 18:16:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 355. [2022-01-31 18:16:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.2492836676217765) internal successors, (436), 349 states have internal predecessors, (436), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 441 transitions. [2022-01-31 18:16:34,655 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 441 transitions. Word has length 346 [2022-01-31 18:16:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:34,656 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 441 transitions. [2022-01-31 18:16:34,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 441 transitions. [2022-01-31 18:16:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 18:16:34,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:34,659 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:34,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:16:34,659 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -376406801, now seen corresponding path program 84 times [2022-01-31 18:16:34,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760706694] [2022-01-31 18:16:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:34,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:34,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:34,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:34,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:37,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:37,597 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:37,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760706694] [2022-01-31 18:16:37,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760706694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:37,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:37,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:16:37,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688895427] [2022-01-31 18:16:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:37,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:16:37,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:16:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:16:37,599 INFO L87 Difference]: Start difference. First operand 355 states and 441 transitions. Second operand has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:39,110 INFO L93 Difference]: Finished difference Result 799 states and 1059 transitions. [2022-01-31 18:16:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:16:39,110 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 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 350 [2022-01-31 18:16:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:39,111 INFO L225 Difference]: With dead ends: 799 [2022-01-31 18:16:39,111 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 18:16:39,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:16:39,112 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1516 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:39,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1601 Valid, 641 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:16:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 18:16:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 359. [2022-01-31 18:16:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 353 states have (on average 1.2492917847025495) internal successors, (441), 353 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 446 transitions. [2022-01-31 18:16:39,121 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 446 transitions. Word has length 350 [2022-01-31 18:16:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:39,121 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 446 transitions. [2022-01-31 18:16:39,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 446 transitions. [2022-01-31 18:16:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-31 18:16:39,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:39,122 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:39,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:16:39,122 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2014170324, now seen corresponding path program 85 times [2022-01-31 18:16:39,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:39,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644693753] [2022-01-31 18:16:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:39,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:39,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:39,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:39,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:41,293 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:41,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644693753] [2022-01-31 18:16:41,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644693753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:41,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:41,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:16:41,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374299299] [2022-01-31 18:16:41,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:41,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:16:41,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:41,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:16:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:16:41,302 INFO L87 Difference]: Start difference. First operand 359 states and 446 transitions. Second operand has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:43,064 INFO L93 Difference]: Finished difference Result 808 states and 1071 transitions. [2022-01-31 18:16:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:16:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 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 354 [2022-01-31 18:16:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:43,066 INFO L225 Difference]: With dead ends: 808 [2022-01-31 18:16:43,066 INFO L226 Difference]: Without dead ends: 796 [2022-01-31 18:16:43,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:16:43,068 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1773 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:43,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 598 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:16:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-31 18:16:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 363. [2022-01-31 18:16:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 357 states have (on average 1.2492997198879552) internal successors, (446), 357 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2022-01-31 18:16:43,087 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 354 [2022-01-31 18:16:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:43,088 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2022-01-31 18:16:43,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2022-01-31 18:16:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-31 18:16:43,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:43,090 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:43,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:16:43,091 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:43,091 INFO L85 PathProgramCache]: Analyzing trace with hash -437870023, now seen corresponding path program 86 times [2022-01-31 18:16:43,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:43,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358358564] [2022-01-31 18:16:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:43,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:43,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:43,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:43,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:46,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:46,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358358564] [2022-01-31 18:16:46,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [358358564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:46,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:46,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:16:46,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030559077] [2022-01-31 18:16:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:46,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:16:46,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:16:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:16:46,123 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:47,965 INFO L93 Difference]: Finished difference Result 817 states and 1083 transitions. [2022-01-31 18:16:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:16:47,966 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 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 358 [2022-01-31 18:16:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:47,967 INFO L225 Difference]: With dead ends: 817 [2022-01-31 18:16:47,967 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 18:16:47,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:16:47,968 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1589 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:47,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 633 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 18:16:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 367. [2022-01-31 18:16:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.2493074792243768) internal successors, (451), 361 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 456 transitions. [2022-01-31 18:16:47,976 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 456 transitions. Word has length 358 [2022-01-31 18:16:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:47,976 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 456 transitions. [2022-01-31 18:16:47,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 456 transitions. [2022-01-31 18:16:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 18:16:47,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:47,978 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:47,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:16:47,978 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:47,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:47,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1725709598, now seen corresponding path program 87 times [2022-01-31 18:16:47,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:47,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365911465] [2022-01-31 18:16:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:47,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:47,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:47,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:48,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:50,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:50,718 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:50,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365911465] [2022-01-31 18:16:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [365911465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:50,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:50,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:16:50,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010756219] [2022-01-31 18:16:50,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:16:50,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:16:50,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:16:50,721 INFO L87 Difference]: Start difference. First operand 367 states and 456 transitions. Second operand has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:52,420 INFO L93 Difference]: Finished difference Result 826 states and 1095 transitions. [2022-01-31 18:16:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:16:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 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 362 [2022-01-31 18:16:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:52,422 INFO L225 Difference]: With dead ends: 826 [2022-01-31 18:16:52,422 INFO L226 Difference]: Without dead ends: 814 [2022-01-31 18:16:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:16:52,423 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1729 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:52,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1817 Valid, 629 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-31 18:16:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 371. [2022-01-31 18:16:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 365 states have (on average 1.2493150684931507) internal successors, (456), 365 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 461 transitions. [2022-01-31 18:16:52,432 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 461 transitions. Word has length 362 [2022-01-31 18:16:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:52,432 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 461 transitions. [2022-01-31 18:16:52,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 461 transitions. [2022-01-31 18:16:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 18:16:52,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:52,434 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:52,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:16:52,434 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash -334504573, now seen corresponding path program 88 times [2022-01-31 18:16:52,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952483866] [2022-01-31 18:16:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:52,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:52,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:52,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:52,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:54,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952483866] [2022-01-31 18:16:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952483866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:54,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:54,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:16:54,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902131356] [2022-01-31 18:16:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:54,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:16:54,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:16:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:16:54,710 INFO L87 Difference]: Start difference. First operand 371 states and 461 transitions. Second operand has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:56,607 INFO L93 Difference]: Finished difference Result 835 states and 1107 transitions. [2022-01-31 18:16:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:16:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 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 366 [2022-01-31 18:16:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:56,609 INFO L225 Difference]: With dead ends: 835 [2022-01-31 18:16:56,609 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 18:16:56,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:16:56,610 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1761 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:56,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 649 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 18:16:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 375. [2022-01-31 18:16:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 369 states have (on average 1.2493224932249323) internal successors, (461), 369 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:16:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 466 transitions. [2022-01-31 18:16:56,619 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 466 transitions. Word has length 366 [2022-01-31 18:16:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:56,619 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 466 transitions. [2022-01-31 18:16:56,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:16:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 466 transitions. [2022-01-31 18:16:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-01-31 18:16:56,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:56,620 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:56,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:16:56,621 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1946338152, now seen corresponding path program 89 times [2022-01-31 18:16:56,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:56,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279152509] [2022-01-31 18:16:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:56,630 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:56,630 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:56,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:56,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:58,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:58,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:58,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279152509] [2022-01-31 18:16:58,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279152509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:58,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:58,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:16:58,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327815585] [2022-01-31 18:16:58,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:58,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:16:58,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:16:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:16:58,782 INFO L87 Difference]: Start difference. First operand 375 states and 466 transitions. Second operand has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:00,661 INFO L93 Difference]: Finished difference Result 844 states and 1119 transitions. [2022-01-31 18:17:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:17:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 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 370 [2022-01-31 18:17:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:00,663 INFO L225 Difference]: With dead ends: 844 [2022-01-31 18:17:00,663 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 18:17:00,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4281, Invalid=4461, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:17:00,664 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 1649 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:00,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 660 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:17:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 18:17:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 379. [2022-01-31 18:17:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 373 states have (on average 1.2493297587131367) internal successors, (466), 373 states have internal predecessors, (466), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 471 transitions. [2022-01-31 18:17:00,692 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 471 transitions. Word has length 370 [2022-01-31 18:17:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:00,692 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 471 transitions. [2022-01-31 18:17:00,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 471 transitions. [2022-01-31 18:17:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 18:17:00,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:00,708 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:00,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:17:00,708 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1519791821, now seen corresponding path program 90 times [2022-01-31 18:17:00,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:00,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218706363] [2022-01-31 18:17:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:00,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:00,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:00,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:00,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:03,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:03,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218706363] [2022-01-31 18:17:03,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [218706363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:03,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:03,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:17:03,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777030649] [2022-01-31 18:17:03,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:17:03,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:03,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:17:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:17:03,750 INFO L87 Difference]: Start difference. First operand 379 states and 471 transitions. Second operand has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:05,702 INFO L93 Difference]: Finished difference Result 853 states and 1131 transitions. [2022-01-31 18:17:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:17:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 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 374 [2022-01-31 18:17:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:05,704 INFO L225 Difference]: With dead ends: 853 [2022-01-31 18:17:05,704 INFO L226 Difference]: Without dead ends: 841 [2022-01-31 18:17:05,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4374, Invalid=4556, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:17:05,704 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1868 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:05,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 632 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:17:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-31 18:17:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 383. [2022-01-31 18:17:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 377 states have (on average 1.2493368700265253) internal successors, (471), 377 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 476 transitions. [2022-01-31 18:17:05,713 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 476 transitions. Word has length 374 [2022-01-31 18:17:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:05,713 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 476 transitions. [2022-01-31 18:17:05,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 476 transitions. [2022-01-31 18:17:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-31 18:17:05,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:05,715 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:17:05,715 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1458872398, now seen corresponding path program 91 times [2022-01-31 18:17:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962752750] [2022-01-31 18:17:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:05,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:05,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:05,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:05,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:08,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:08,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962752750] [2022-01-31 18:17:08,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [962752750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:08,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:08,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:17:08,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533977903] [2022-01-31 18:17:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:08,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:17:08,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:17:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:17:08,079 INFO L87 Difference]: Start difference. First operand 383 states and 476 transitions. Second operand has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:10,224 INFO L93 Difference]: Finished difference Result 862 states and 1143 transitions. [2022-01-31 18:17:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:17:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 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 378 [2022-01-31 18:17:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:10,227 INFO L225 Difference]: With dead ends: 862 [2022-01-31 18:17:10,227 INFO L226 Difference]: Without dead ends: 850 [2022-01-31 18:17:10,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4468, Invalid=4652, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:17:10,227 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 2102 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:10,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2194 Valid, 648 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-31 18:17:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 387. [2022-01-31 18:17:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.2493438320209973) internal successors, (476), 381 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 481 transitions. [2022-01-31 18:17:10,236 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 481 transitions. Word has length 378 [2022-01-31 18:17:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:10,237 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 481 transitions. [2022-01-31 18:17:10,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 481 transitions. [2022-01-31 18:17:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 18:17:10,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:10,238 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:10,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:17:10,238 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1711511063, now seen corresponding path program 92 times [2022-01-31 18:17:10,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:10,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702644230] [2022-01-31 18:17:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:10,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:10,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:10,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:10,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:13,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:13,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:13,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702644230] [2022-01-31 18:17:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702644230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:13,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:13,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:17:13,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559648388] [2022-01-31 18:17:13,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:13,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:17:13,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:17:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:17:13,576 INFO L87 Difference]: Start difference. First operand 387 states and 481 transitions. Second operand has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:15,736 INFO L93 Difference]: Finished difference Result 871 states and 1155 transitions. [2022-01-31 18:17:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:17:15,736 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 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 382 [2022-01-31 18:17:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:15,738 INFO L225 Difference]: With dead ends: 871 [2022-01-31 18:17:15,738 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 18:17:15,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4563, Invalid=4749, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:17:15,739 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 2011 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:15,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2104 Valid, 646 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 18:17:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 391. [2022-01-31 18:17:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.2493506493506494) internal successors, (481), 385 states have internal predecessors, (481), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 486 transitions. [2022-01-31 18:17:15,748 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 486 transitions. Word has length 382 [2022-01-31 18:17:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 486 transitions. [2022-01-31 18:17:15,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 486 transitions. [2022-01-31 18:17:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-31 18:17:15,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:15,750 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:15,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:17:15,750 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -444591620, now seen corresponding path program 93 times [2022-01-31 18:17:15,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:15,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615853685] [2022-01-31 18:17:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:15,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:15,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:15,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:15,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:18,623 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:18,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615853685] [2022-01-31 18:17:18,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615853685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:18,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:18,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:17:18,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244735199] [2022-01-31 18:17:18,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:17:18,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:17:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:17:18,626 INFO L87 Difference]: Start difference. First operand 391 states and 486 transitions. Second operand has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:21,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:21,644 INFO L93 Difference]: Finished difference Result 880 states and 1167 transitions. [2022-01-31 18:17:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:17:21,645 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 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 386 [2022-01-31 18:17:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:21,647 INFO L225 Difference]: With dead ends: 880 [2022-01-31 18:17:21,647 INFO L226 Difference]: Without dead ends: 868 [2022-01-31 18:17:21,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:17:21,648 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1815 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:21,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1909 Valid, 651 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:17:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-31 18:17:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 395. [2022-01-31 18:17:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 389 states have (on average 1.249357326478149) internal successors, (486), 389 states have internal predecessors, (486), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 491 transitions. [2022-01-31 18:17:21,663 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 491 transitions. Word has length 386 [2022-01-31 18:17:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:21,663 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 491 transitions. [2022-01-31 18:17:21,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 491 transitions. [2022-01-31 18:17:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 18:17:21,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:21,665 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:21,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:17:21,666 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 417469281, now seen corresponding path program 94 times [2022-01-31 18:17:21,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:21,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584289733] [2022-01-31 18:17:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:21,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:21,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:21,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:21,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:25,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584289733] [2022-01-31 18:17:25,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [584289733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:25,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:25,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:17:25,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974580240] [2022-01-31 18:17:25,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:17:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:17:25,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:17:25,682 INFO L87 Difference]: Start difference. First operand 395 states and 491 transitions. Second operand has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:27,906 INFO L93 Difference]: Finished difference Result 889 states and 1179 transitions. [2022-01-31 18:17:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:17:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 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 390 [2022-01-31 18:17:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:27,908 INFO L225 Difference]: With dead ends: 889 [2022-01-31 18:17:27,908 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 18:17:27,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4756, Invalid=4946, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:17:27,909 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1864 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:27,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 684 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:17:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 18:17:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 399. [2022-01-31 18:17:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 393 states have (on average 1.2493638676844783) internal successors, (491), 393 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 496 transitions. [2022-01-31 18:17:27,918 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 496 transitions. Word has length 390 [2022-01-31 18:17:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:27,919 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 496 transitions. [2022-01-31 18:17:27,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 496 transitions. [2022-01-31 18:17:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-01-31 18:17:27,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:27,920 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:27,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:17:27,921 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash -555034042, now seen corresponding path program 95 times [2022-01-31 18:17:27,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:27,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238696460] [2022-01-31 18:17:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:27,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:27,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:27,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:28,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:30,867 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:30,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238696460] [2022-01-31 18:17:30,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [238696460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:30,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:30,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:17:30,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211653908] [2022-01-31 18:17:30,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:30,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:17:30,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:17:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:17:30,869 INFO L87 Difference]: Start difference. First operand 399 states and 496 transitions. Second operand has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:33,459 INFO L93 Difference]: Finished difference Result 898 states and 1191 transitions. [2022-01-31 18:17:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:17:33,459 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 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 394 [2022-01-31 18:17:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:33,461 INFO L225 Difference]: With dead ends: 898 [2022-01-31 18:17:33,461 INFO L226 Difference]: Without dead ends: 886 [2022-01-31 18:17:33,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4854, Invalid=5046, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:17:33,462 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1879 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:33,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 687 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:17:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-31 18:17:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 403. [2022-01-31 18:17:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 397 states have (on average 1.2493702770780857) internal successors, (496), 397 states have internal predecessors, (496), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 501 transitions. [2022-01-31 18:17:33,474 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 501 transitions. Word has length 394 [2022-01-31 18:17:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 501 transitions. [2022-01-31 18:17:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 501 transitions. [2022-01-31 18:17:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-01-31 18:17:33,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:33,476 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:33,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:17:33,476 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1404806827, now seen corresponding path program 96 times [2022-01-31 18:17:33,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:33,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880984752] [2022-01-31 18:17:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:33,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:33,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:33,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:33,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:35,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:35,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:35,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880984752] [2022-01-31 18:17:35,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [880984752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:35,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:35,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:17:35,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415584535] [2022-01-31 18:17:35,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:35,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:17:35,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:17:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:17:35,996 INFO L87 Difference]: Start difference. First operand 403 states and 501 transitions. Second operand has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:38,409 INFO L93 Difference]: Finished difference Result 907 states and 1203 transitions. [2022-01-31 18:17:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:17:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 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 398 [2022-01-31 18:17:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:38,411 INFO L225 Difference]: With dead ends: 907 [2022-01-31 18:17:38,411 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 18:17:38,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4953, Invalid=5147, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:17:38,412 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2017 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:38,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2114 Valid, 674 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 18:17:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 407. [2022-01-31 18:17:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 401 states have (on average 1.2493765586034913) internal successors, (501), 401 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 506 transitions. [2022-01-31 18:17:38,422 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 506 transitions. Word has length 398 [2022-01-31 18:17:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:38,422 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 506 transitions. [2022-01-31 18:17:38,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 506 transitions. [2022-01-31 18:17:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-01-31 18:17:38,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:38,424 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:38,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:17:38,424 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash 550877328, now seen corresponding path program 97 times [2022-01-31 18:17:38,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:38,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599641463] [2022-01-31 18:17:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:38,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:38,428 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:38,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:38,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:41,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:41,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:41,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599641463] [2022-01-31 18:17:41,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [599641463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:41,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:41,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:17:41,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750991025] [2022-01-31 18:17:41,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:41,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:17:41,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:41,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:17:41,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:17:41,113 INFO L87 Difference]: Start difference. First operand 407 states and 506 transitions. Second operand has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:43,522 INFO L93 Difference]: Finished difference Result 916 states and 1215 transitions. [2022-01-31 18:17:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:17:43,522 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 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 402 [2022-01-31 18:17:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:43,524 INFO L225 Difference]: With dead ends: 916 [2022-01-31 18:17:43,524 INFO L226 Difference]: Without dead ends: 904 [2022-01-31 18:17:43,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5053, Invalid=5249, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:17:43,525 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1921 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:43,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 693 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-31 18:17:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 411. [2022-01-31 18:17:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 405 states have (on average 1.2493827160493827) internal successors, (506), 405 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 511 transitions. [2022-01-31 18:17:43,534 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 511 transitions. Word has length 402 [2022-01-31 18:17:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:43,534 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 511 transitions. [2022-01-31 18:17:43,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 511 transitions. [2022-01-31 18:17:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 18:17:43,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:43,539 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:43,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:17:43,539 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash -853913611, now seen corresponding path program 98 times [2022-01-31 18:17:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:43,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560599489] [2022-01-31 18:17:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:43,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:43,551 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:43,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:43,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:47,279 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560599489] [2022-01-31 18:17:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560599489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:47,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:47,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:17:47,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982178464] [2022-01-31 18:17:47,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:47,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:17:47,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:17:47,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:17:47,285 INFO L87 Difference]: Start difference. First operand 411 states and 511 transitions. Second operand has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:50,088 INFO L93 Difference]: Finished difference Result 925 states and 1227 transitions. [2022-01-31 18:17:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:17:50,089 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 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 406 [2022-01-31 18:17:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:50,091 INFO L225 Difference]: With dead ends: 925 [2022-01-31 18:17:50,091 INFO L226 Difference]: Without dead ends: 913 [2022-01-31 18:17:50,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5154, Invalid=5352, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:17:50,092 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2152 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:50,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 704 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-31 18:17:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 415. [2022-01-31 18:17:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 409 states have (on average 1.2493887530562346) internal successors, (511), 409 states have internal predecessors, (511), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 516 transitions. [2022-01-31 18:17:50,104 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 516 transitions. Word has length 406 [2022-01-31 18:17:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:50,104 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 516 transitions. [2022-01-31 18:17:50,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 516 transitions. [2022-01-31 18:17:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 18:17:50,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:50,107 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:50,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:17:50,108 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash 214609114, now seen corresponding path program 99 times [2022-01-31 18:17:50,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:50,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824840852] [2022-01-31 18:17:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:50,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:50,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:50,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:50,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:53,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:53,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824840852] [2022-01-31 18:17:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824840852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:53,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:17:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341687045] [2022-01-31 18:17:53,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:53,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:17:53,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:53,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:17:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:17:53,969 INFO L87 Difference]: Start difference. First operand 415 states and 516 transitions. Second operand has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:56,867 INFO L93 Difference]: Finished difference Result 934 states and 1239 transitions. [2022-01-31 18:17:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:17:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 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 410 [2022-01-31 18:17:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:56,869 INFO L225 Difference]: With dead ends: 934 [2022-01-31 18:17:56,870 INFO L226 Difference]: Without dead ends: 922 [2022-01-31 18:17:56,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:17:56,870 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 2869 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2969 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:56,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2969 Valid, 685 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1204 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-31 18:17:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 419. [2022-01-31 18:17:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 413 states have (on average 1.2493946731234866) internal successors, (516), 413 states have internal predecessors, (516), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:17:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 521 transitions. [2022-01-31 18:17:56,880 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 521 transitions. Word has length 410 [2022-01-31 18:17:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:56,880 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 521 transitions. [2022-01-31 18:17:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:17:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 521 transitions. [2022-01-31 18:17:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-31 18:17:56,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:56,882 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:56,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:17:56,882 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash 294129471, now seen corresponding path program 100 times [2022-01-31 18:17:56,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:56,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155029023] [2022-01-31 18:17:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:56,886 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:56,886 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:56,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:56,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:00,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:00,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155029023] [2022-01-31 18:18:00,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [155029023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:00,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:00,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:18:00,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341093765] [2022-01-31 18:18:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:00,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:18:00,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:18:00,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:18:00,775 INFO L87 Difference]: Start difference. First operand 419 states and 521 transitions. Second operand has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:03,523 INFO L93 Difference]: Finished difference Result 943 states and 1251 transitions. [2022-01-31 18:18:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:18:03,524 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 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 414 [2022-01-31 18:18:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:03,526 INFO L225 Difference]: With dead ends: 943 [2022-01-31 18:18:03,526 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 18:18:03,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:18:03,527 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 2475 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 1010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:03,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 714 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1010 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 18:18:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 423. [2022-01-31 18:18:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 417 states have (on average 1.249400479616307) internal successors, (521), 417 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 526 transitions. [2022-01-31 18:18:03,537 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 526 transitions. Word has length 414 [2022-01-31 18:18:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:03,537 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 526 transitions. [2022-01-31 18:18:03,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 526 transitions. [2022-01-31 18:18:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-01-31 18:18:03,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:03,539 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:03,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:18:03,539 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash -632047836, now seen corresponding path program 101 times [2022-01-31 18:18:03,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:03,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665155619] [2022-01-31 18:18:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:03,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:03,543 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:03,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:03,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:07,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:07,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665155619] [2022-01-31 18:18:07,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [665155619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:07,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:07,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:18:07,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049403566] [2022-01-31 18:18:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:07,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:18:07,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:07,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:18:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:18:07,562 INFO L87 Difference]: Start difference. First operand 423 states and 526 transitions. Second operand has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:10,462 INFO L93 Difference]: Finished difference Result 952 states and 1263 transitions. [2022-01-31 18:18:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:18:10,462 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 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 418 [2022-01-31 18:18:10,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:10,464 INFO L225 Difference]: With dead ends: 952 [2022-01-31 18:18:10,464 INFO L226 Difference]: Without dead ends: 940 [2022-01-31 18:18:10,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:18:10,468 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 2306 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:10,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2408 Valid, 741 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-31 18:18:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 427. [2022-01-31 18:18:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.2494061757719714) internal successors, (526), 421 states have internal predecessors, (526), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 531 transitions. [2022-01-31 18:18:10,491 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 531 transitions. Word has length 418 [2022-01-31 18:18:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:10,492 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 531 transitions. [2022-01-31 18:18:10,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 531 transitions. [2022-01-31 18:18:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 18:18:10,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:10,493 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:10,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:18:10,493 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2087787383, now seen corresponding path program 102 times [2022-01-31 18:18:10,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:10,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358476962] [2022-01-31 18:18:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:10,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:10,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:10,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:10,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:13,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:13,231 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358476962] [2022-01-31 18:18:13,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [358476962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:13,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:13,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:18:13,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732699127] [2022-01-31 18:18:13,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:13,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:18:13,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:18:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:18:13,235 INFO L87 Difference]: Start difference. First operand 427 states and 531 transitions. Second operand has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:16,341 INFO L93 Difference]: Finished difference Result 961 states and 1275 transitions. [2022-01-31 18:18:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:18:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 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 422 [2022-01-31 18:18:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:16,356 INFO L225 Difference]: With dead ends: 961 [2022-01-31 18:18:16,356 INFO L226 Difference]: Without dead ends: 949 [2022-01-31 18:18:16,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5568, Invalid=5774, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:18:16,357 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 2416 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2519 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:16,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2519 Valid, 706 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-31 18:18:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 431. [2022-01-31 18:18:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 425 states have (on average 1.2494117647058824) internal successors, (531), 425 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 536 transitions. [2022-01-31 18:18:16,381 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 536 transitions. Word has length 422 [2022-01-31 18:18:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:16,381 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 536 transitions. [2022-01-31 18:18:16,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 536 transitions. [2022-01-31 18:18:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-31 18:18:16,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:16,383 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:16,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:18:16,383 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1761945746, now seen corresponding path program 103 times [2022-01-31 18:18:16,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:16,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506200266] [2022-01-31 18:18:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:16,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:16,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:16,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:16,483 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:19,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506200266] [2022-01-31 18:18:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506200266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:19,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:19,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:18:19,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115136985] [2022-01-31 18:18:19,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:19,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:18:19,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:18:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:18:19,873 INFO L87 Difference]: Start difference. First operand 431 states and 536 transitions. Second operand has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:22,757 INFO L93 Difference]: Finished difference Result 970 states and 1287 transitions. [2022-01-31 18:18:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:18:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 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 426 [2022-01-31 18:18:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:22,759 INFO L225 Difference]: With dead ends: 970 [2022-01-31 18:18:22,759 INFO L226 Difference]: Without dead ends: 958 [2022-01-31 18:18:22,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5674, Invalid=5882, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:18:22,760 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 2579 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2683 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:22,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2683 Valid, 725 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-31 18:18:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 435. [2022-01-31 18:18:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 429 states have (on average 1.2494172494172495) internal successors, (536), 429 states have internal predecessors, (536), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 541 transitions. [2022-01-31 18:18:22,770 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 541 transitions. Word has length 426 [2022-01-31 18:18:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:22,770 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 541 transitions. [2022-01-31 18:18:22,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 541 transitions. [2022-01-31 18:18:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 18:18:22,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:22,772 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:22,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:18:22,772 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1538838483, now seen corresponding path program 104 times [2022-01-31 18:18:22,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:22,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576221306] [2022-01-31 18:18:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:22,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:22,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:22,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:22,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:26,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:26,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576221306] [2022-01-31 18:18:26,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576221306] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:26,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:26,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:18:26,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582235646] [2022-01-31 18:18:26,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:26,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:18:26,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:18:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:18:26,839 INFO L87 Difference]: Start difference. First operand 435 states and 541 transitions. Second operand has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:29,836 INFO L93 Difference]: Finished difference Result 979 states and 1299 transitions. [2022-01-31 18:18:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:18:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 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 430 [2022-01-31 18:18:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:29,838 INFO L225 Difference]: With dead ends: 979 [2022-01-31 18:18:29,838 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 18:18:29,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5781, Invalid=5991, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:18:29,839 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 2304 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2409 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:29,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2409 Valid, 730 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 18:18:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 439. [2022-01-31 18:18:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 433 states have (on average 1.2494226327944573) internal successors, (541), 433 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 546 transitions. [2022-01-31 18:18:29,852 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 546 transitions. Word has length 430 [2022-01-31 18:18:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:29,853 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 546 transitions. [2022-01-31 18:18:29,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 546 transitions. [2022-01-31 18:18:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-31 18:18:29,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:29,855 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:29,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:18:29,855 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash 642387384, now seen corresponding path program 105 times [2022-01-31 18:18:29,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:29,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363823078] [2022-01-31 18:18:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:29,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:29,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:29,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:29,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:33,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:33,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363823078] [2022-01-31 18:18:33,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [363823078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:33,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:33,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:18:33,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589507624] [2022-01-31 18:18:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:33,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:18:33,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:33,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:18:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:18:33,409 INFO L87 Difference]: Start difference. First operand 439 states and 546 transitions. Second operand has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:36,558 INFO L93 Difference]: Finished difference Result 988 states and 1311 transitions. [2022-01-31 18:18:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:18:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 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 434 [2022-01-31 18:18:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:36,560 INFO L225 Difference]: With dead ends: 988 [2022-01-31 18:18:36,560 INFO L226 Difference]: Without dead ends: 976 [2022-01-31 18:18:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5889, Invalid=6101, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:18:36,561 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 2403 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:36,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 730 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-31 18:18:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 443. [2022-01-31 18:18:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 437 states have (on average 1.2494279176201373) internal successors, (546), 437 states have internal predecessors, (546), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 551 transitions. [2022-01-31 18:18:36,571 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 551 transitions. Word has length 434 [2022-01-31 18:18:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:36,572 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 551 transitions. [2022-01-31 18:18:36,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 551 transitions. [2022-01-31 18:18:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 18:18:36,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:36,573 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:18:36,574 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:36,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1466969827, now seen corresponding path program 106 times [2022-01-31 18:18:36,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:36,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779198812] [2022-01-31 18:18:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:36,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:36,580 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:36,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:36,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:39,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779198812] [2022-01-31 18:18:39,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [779198812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:39,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:39,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:18:39,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047398117] [2022-01-31 18:18:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:39,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:18:39,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:18:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:18:39,885 INFO L87 Difference]: Start difference. First operand 443 states and 551 transitions. Second operand has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:43,299 INFO L93 Difference]: Finished difference Result 997 states and 1323 transitions. [2022-01-31 18:18:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:18:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 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 438 [2022-01-31 18:18:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:43,301 INFO L225 Difference]: With dead ends: 997 [2022-01-31 18:18:43,301 INFO L226 Difference]: Without dead ends: 985 [2022-01-31 18:18:43,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5998, Invalid=6212, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:18:43,302 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 2043 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:43,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2150 Valid, 763 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-31 18:18:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 447. [2022-01-31 18:18:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 441 states have (on average 1.2494331065759636) internal successors, (551), 441 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 556 transitions. [2022-01-31 18:18:43,313 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 556 transitions. Word has length 438 [2022-01-31 18:18:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:43,313 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 556 transitions. [2022-01-31 18:18:43,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 556 transitions. [2022-01-31 18:18:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-01-31 18:18:43,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:43,315 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:43,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:18:43,315 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1103845890, now seen corresponding path program 107 times [2022-01-31 18:18:43,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:43,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210829909] [2022-01-31 18:18:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:43,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:43,320 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:43,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:43,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:47,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:47,147 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210829909] [2022-01-31 18:18:47,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210829909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:47,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:47,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:18:47,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612926250] [2022-01-31 18:18:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:47,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:18:47,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:18:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:18:47,150 INFO L87 Difference]: Start difference. First operand 447 states and 556 transitions. Second operand has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:50,414 INFO L93 Difference]: Finished difference Result 1006 states and 1335 transitions. [2022-01-31 18:18:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:18:50,414 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 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 442 [2022-01-31 18:18:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:50,424 INFO L225 Difference]: With dead ends: 1006 [2022-01-31 18:18:50,424 INFO L226 Difference]: Without dead ends: 994 [2022-01-31 18:18:50,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6108, Invalid=6324, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:18:50,425 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2387 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2495 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:50,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2495 Valid, 761 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-31 18:18:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 451. [2022-01-31 18:18:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 445 states have (on average 1.249438202247191) internal successors, (556), 445 states have internal predecessors, (556), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 561 transitions. [2022-01-31 18:18:50,435 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 561 transitions. Word has length 442 [2022-01-31 18:18:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:50,436 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 561 transitions. [2022-01-31 18:18:50,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 561 transitions. [2022-01-31 18:18:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 18:18:50,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:50,438 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:50,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:18:50,438 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:50,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1318971495, now seen corresponding path program 108 times [2022-01-31 18:18:50,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:50,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628370969] [2022-01-31 18:18:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:50,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:50,441 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:50,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:54,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:54,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:54,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628370969] [2022-01-31 18:18:54,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628370969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:54,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:54,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:18:54,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084251211] [2022-01-31 18:18:54,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:54,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:18:54,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:54,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:18:54,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:18:54,016 INFO L87 Difference]: Start difference. First operand 451 states and 561 transitions. Second operand has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:57,656 INFO L93 Difference]: Finished difference Result 1015 states and 1347 transitions. [2022-01-31 18:18:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:18:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 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 446 [2022-01-31 18:18:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:57,658 INFO L225 Difference]: With dead ends: 1015 [2022-01-31 18:18:57,658 INFO L226 Difference]: Without dead ends: 1003 [2022-01-31 18:18:57,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6219, Invalid=6437, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:18:57,658 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 2458 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2567 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:57,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2567 Valid, 754 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-31 18:18:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 455. [2022-01-31 18:18:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.2494432071269488) internal successors, (561), 449 states have internal predecessors, (561), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:18:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 566 transitions. [2022-01-31 18:18:57,669 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 566 transitions. Word has length 446 [2022-01-31 18:18:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 566 transitions. [2022-01-31 18:18:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:18:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 566 transitions. [2022-01-31 18:18:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-01-31 18:18:57,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:57,671 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:57,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:18:57,671 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2030615628, now seen corresponding path program 109 times [2022-01-31 18:18:57,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110894317] [2022-01-31 18:18:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:57,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:57,674 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:57,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:57,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:00,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:00,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110894317] [2022-01-31 18:19:00,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110894317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:00,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:00,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:19:00,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531253762] [2022-01-31 18:19:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:00,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:19:00,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:00,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:19:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:19:00,828 INFO L87 Difference]: Start difference. First operand 455 states and 566 transitions. Second operand has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:04,273 INFO L93 Difference]: Finished difference Result 1024 states and 1359 transitions. [2022-01-31 18:19:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:19:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 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 450 [2022-01-31 18:19:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:04,275 INFO L225 Difference]: With dead ends: 1024 [2022-01-31 18:19:04,275 INFO L226 Difference]: Without dead ends: 1012 [2022-01-31 18:19:04,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6331, Invalid=6551, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:19:04,276 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2207 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:04,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2317 Valid, 774 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-01-31 18:19:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 459. [2022-01-31 18:19:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 453 states have (on average 1.249448123620309) internal successors, (566), 453 states have internal predecessors, (566), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 571 transitions. [2022-01-31 18:19:04,286 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 571 transitions. Word has length 450 [2022-01-31 18:19:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:04,287 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 571 transitions. [2022-01-31 18:19:04,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 571 transitions. [2022-01-31 18:19:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-01-31 18:19:04,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:04,289 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:04,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:19:04,289 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash 141366705, now seen corresponding path program 110 times [2022-01-31 18:19:04,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872976106] [2022-01-31 18:19:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:04,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:04,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:04,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:04,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:08,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:08,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:08,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872976106] [2022-01-31 18:19:08,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872976106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:08,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:08,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:19:08,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818813426] [2022-01-31 18:19:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:08,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:19:08,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:19:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:19:08,738 INFO L87 Difference]: Start difference. First operand 459 states and 571 transitions. Second operand has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:12,568 INFO L93 Difference]: Finished difference Result 1033 states and 1371 transitions. [2022-01-31 18:19:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:19:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 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 454 [2022-01-31 18:19:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:12,570 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 18:19:12,570 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 18:19:12,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6444, Invalid=6666, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:19:12,571 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2082 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2193 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:12,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2193 Valid, 786 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 18:19:12,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 463. [2022-01-31 18:19:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 457 states have (on average 1.24945295404814) internal successors, (571), 457 states have internal predecessors, (571), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 576 transitions. [2022-01-31 18:19:12,581 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 576 transitions. Word has length 454 [2022-01-31 18:19:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:12,582 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 576 transitions. [2022-01-31 18:19:12,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 576 transitions. [2022-01-31 18:19:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-01-31 18:19:12,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:12,584 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:12,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:19:12,584 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 831272086, now seen corresponding path program 111 times [2022-01-31 18:19:12,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160689189] [2022-01-31 18:19:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:12,587 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:12,587 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:12,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:12,666 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:16,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:16,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160689189] [2022-01-31 18:19:16,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [160689189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:16,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:16,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:19:16,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588906003] [2022-01-31 18:19:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:16,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:19:16,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:19:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:19:16,191 INFO L87 Difference]: Start difference. First operand 463 states and 576 transitions. Second operand has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:20,021 INFO L93 Difference]: Finished difference Result 1042 states and 1383 transitions. [2022-01-31 18:19:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:19:20,021 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 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 458 [2022-01-31 18:19:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:20,023 INFO L225 Difference]: With dead ends: 1042 [2022-01-31 18:19:20,023 INFO L226 Difference]: Without dead ends: 1030 [2022-01-31 18:19:20,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6558, Invalid=6782, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:19:20,024 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 2254 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2366 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:20,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2366 Valid, 779 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-31 18:19:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 467. [2022-01-31 18:19:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 461 states have (on average 1.2494577006507592) internal successors, (576), 461 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 581 transitions. [2022-01-31 18:19:20,035 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 581 transitions. Word has length 458 [2022-01-31 18:19:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:20,035 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 581 transitions. [2022-01-31 18:19:20,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 581 transitions. [2022-01-31 18:19:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-01-31 18:19:20,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:20,037 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:20,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:19:20,037 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1720146171, now seen corresponding path program 112 times [2022-01-31 18:19:20,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:20,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995560317] [2022-01-31 18:19:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:20,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:20,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:20,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:20,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:24,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:24,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:24,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995560317] [2022-01-31 18:19:24,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995560317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:24,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:24,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:19:24,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556202595] [2022-01-31 18:19:24,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:24,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:19:24,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:24,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:19:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:19:24,060 INFO L87 Difference]: Start difference. First operand 467 states and 581 transitions. Second operand has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:27,945 INFO L93 Difference]: Finished difference Result 1051 states and 1395 transitions. [2022-01-31 18:19:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:19:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 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 462 [2022-01-31 18:19:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:27,947 INFO L225 Difference]: With dead ends: 1051 [2022-01-31 18:19:27,947 INFO L226 Difference]: Without dead ends: 1039 [2022-01-31 18:19:27,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6673, Invalid=6899, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:19:27,948 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 2373 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:27,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2486 Valid, 784 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-31 18:19:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 471. [2022-01-31 18:19:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 465 states have (on average 1.249462365591398) internal successors, (581), 465 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 586 transitions. [2022-01-31 18:19:27,959 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 586 transitions. Word has length 462 [2022-01-31 18:19:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:27,959 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 586 transitions. [2022-01-31 18:19:27,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 586 transitions. [2022-01-31 18:19:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 18:19:27,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:27,961 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:19:27,961 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1495285024, now seen corresponding path program 113 times [2022-01-31 18:19:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:27,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837845900] [2022-01-31 18:19:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:27,968 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:27,968 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:27,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:28,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:31,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:31,424 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:31,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837845900] [2022-01-31 18:19:31,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837845900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:31,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:31,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:19:31,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417505754] [2022-01-31 18:19:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:31,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:19:31,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:19:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:19:31,428 INFO L87 Difference]: Start difference. First operand 471 states and 586 transitions. Second operand has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:35,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:35,358 INFO L93 Difference]: Finished difference Result 1060 states and 1407 transitions. [2022-01-31 18:19:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:19:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 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 466 [2022-01-31 18:19:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:35,362 INFO L225 Difference]: With dead ends: 1060 [2022-01-31 18:19:35,362 INFO L226 Difference]: Without dead ends: 1048 [2022-01-31 18:19:35,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6789, Invalid=7017, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:19:35,363 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 2200 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:35,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 798 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-31 18:19:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 475. [2022-01-31 18:19:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.2494669509594882) internal successors, (586), 469 states have internal predecessors, (586), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 591 transitions. [2022-01-31 18:19:35,375 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 591 transitions. Word has length 466 [2022-01-31 18:19:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:35,375 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 591 transitions. [2022-01-31 18:19:35,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 591 transitions. [2022-01-31 18:19:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 18:19:35,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:35,377 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:19:35,377 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash -814304699, now seen corresponding path program 114 times [2022-01-31 18:19:35,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:35,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676715547] [2022-01-31 18:19:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:35,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:35,381 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:35,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:35,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:38,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676715547] [2022-01-31 18:19:38,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676715547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:38,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:38,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:19:38,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310919195] [2022-01-31 18:19:38,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:38,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:19:38,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:19:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:19:38,653 INFO L87 Difference]: Start difference. First operand 475 states and 591 transitions. Second operand has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:42,359 INFO L93 Difference]: Finished difference Result 1069 states and 1419 transitions. [2022-01-31 18:19:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:19:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 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 470 [2022-01-31 18:19:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:42,361 INFO L225 Difference]: With dead ends: 1069 [2022-01-31 18:19:42,361 INFO L226 Difference]: Without dead ends: 1057 [2022-01-31 18:19:42,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6906, Invalid=7136, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:19:42,362 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2707 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2822 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:42,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2822 Valid, 795 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-01-31 18:19:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 479. [2022-01-31 18:19:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 473 states have (on average 1.2494714587737843) internal successors, (591), 473 states have internal predecessors, (591), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 596 transitions. [2022-01-31 18:19:42,373 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 596 transitions. Word has length 470 [2022-01-31 18:19:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:42,373 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 596 transitions. [2022-01-31 18:19:42,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 596 transitions. [2022-01-31 18:19:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-01-31 18:19:42,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:42,375 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:42,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:19:42,375 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -359831766, now seen corresponding path program 115 times [2022-01-31 18:19:42,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:42,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156094708] [2022-01-31 18:19:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:42,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:42,379 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:42,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:42,482 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:47,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:47,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:47,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156094708] [2022-01-31 18:19:47,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156094708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:47,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:47,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:19:47,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249495505] [2022-01-31 18:19:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:47,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:19:47,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:19:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:19:47,244 INFO L87 Difference]: Start difference. First operand 479 states and 596 transitions. Second operand has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:51,220 INFO L93 Difference]: Finished difference Result 1078 states and 1431 transitions. [2022-01-31 18:19:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:19:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 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 474 [2022-01-31 18:19:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:51,222 INFO L225 Difference]: With dead ends: 1078 [2022-01-31 18:19:51,222 INFO L226 Difference]: Without dead ends: 1066 [2022-01-31 18:19:51,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7024, Invalid=7256, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:19:51,223 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2912 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:51,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3028 Valid, 787 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1179 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:19:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-01-31 18:19:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 483. [2022-01-31 18:19:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 477 states have (on average 1.249475890985325) internal successors, (596), 477 states have internal predecessors, (596), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 601 transitions. [2022-01-31 18:19:51,235 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 601 transitions. Word has length 474 [2022-01-31 18:19:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:51,235 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 601 transitions. [2022-01-31 18:19:51,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 601 transitions. [2022-01-31 18:19:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-31 18:19:51,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:51,237 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:51,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:19:51,237 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2143625615, now seen corresponding path program 116 times [2022-01-31 18:19:51,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436536243] [2022-01-31 18:19:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:51,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:51,241 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:51,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:51,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:54,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:54,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:54,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436536243] [2022-01-31 18:19:54,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [436536243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:54,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:54,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:19:54,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729043646] [2022-01-31 18:19:54,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:54,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:19:54,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:19:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:19:54,519 INFO L87 Difference]: Start difference. First operand 483 states and 601 transitions. Second operand has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:58,850 INFO L93 Difference]: Finished difference Result 1087 states and 1443 transitions. [2022-01-31 18:19:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:19:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 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 478 [2022-01-31 18:19:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:58,852 INFO L225 Difference]: With dead ends: 1087 [2022-01-31 18:19:58,852 INFO L226 Difference]: Without dead ends: 1075 [2022-01-31 18:19:58,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7143, Invalid=7377, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:19:58,853 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 2213 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2330 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:58,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2330 Valid, 826 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-31 18:19:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 487. [2022-01-31 18:19:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 481 states have (on average 1.2494802494802495) internal successors, (601), 481 states have internal predecessors, (601), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:19:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 606 transitions. [2022-01-31 18:19:58,865 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 606 transitions. Word has length 478 [2022-01-31 18:19:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:58,865 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 606 transitions. [2022-01-31 18:19:58,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:19:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 606 transitions. [2022-01-31 18:19:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-01-31 18:19:58,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:58,867 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:58,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:19:58,867 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -467721868, now seen corresponding path program 117 times [2022-01-31 18:19:58,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885249094] [2022-01-31 18:19:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:58,870 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:58,870 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:58,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:58,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:03,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885249094] [2022-01-31 18:20:03,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885249094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:03,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:03,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:20:03,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509900364] [2022-01-31 18:20:03,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:03,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:20:03,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:20:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:20:03,613 INFO L87 Difference]: Start difference. First operand 487 states and 606 transitions. Second operand has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:07,778 INFO L93 Difference]: Finished difference Result 1096 states and 1455 transitions. [2022-01-31 18:20:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:20:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 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 482 [2022-01-31 18:20:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:07,781 INFO L225 Difference]: With dead ends: 1096 [2022-01-31 18:20:07,781 INFO L226 Difference]: Without dead ends: 1084 [2022-01-31 18:20:07,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7263, Invalid=7499, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:20:07,782 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 2518 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:07,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2636 Valid, 829 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:20:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-01-31 18:20:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 491. [2022-01-31 18:20:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 485 states have (on average 1.2494845360824742) internal successors, (606), 485 states have internal predecessors, (606), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 611 transitions. [2022-01-31 18:20:07,796 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 611 transitions. Word has length 482 [2022-01-31 18:20:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:07,796 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 611 transitions. [2022-01-31 18:20:07,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 611 transitions. [2022-01-31 18:20:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 18:20:07,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:07,798 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:07,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:20:07,798 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1979930919, now seen corresponding path program 118 times [2022-01-31 18:20:07,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:07,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508812996] [2022-01-31 18:20:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:07,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:07,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:07,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:07,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:12,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:12,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508812996] [2022-01-31 18:20:12,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [508812996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:12,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:12,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:20:12,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132225755] [2022-01-31 18:20:12,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:20:12,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:20:12,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:20:12,220 INFO L87 Difference]: Start difference. First operand 491 states and 611 transitions. Second operand has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:16,303 INFO L93 Difference]: Finished difference Result 1105 states and 1467 transitions. [2022-01-31 18:20:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:20:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 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 486 [2022-01-31 18:20:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:16,305 INFO L225 Difference]: With dead ends: 1105 [2022-01-31 18:20:16,306 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 18:20:16,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7384, Invalid=7622, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:20:16,306 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 2841 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 1155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2960 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1155 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:16,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2960 Valid, 821 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1155 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:20:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 18:20:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 495. [2022-01-31 18:20:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 489 states have (on average 1.2494887525562373) internal successors, (611), 489 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 616 transitions. [2022-01-31 18:20:16,318 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 616 transitions. Word has length 486 [2022-01-31 18:20:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:16,319 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 616 transitions. [2022-01-31 18:20:16,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 616 transitions. [2022-01-31 18:20:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2022-01-31 18:20:16,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:16,321 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:16,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:20:16,321 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1360982462, now seen corresponding path program 119 times [2022-01-31 18:20:16,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:16,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587167144] [2022-01-31 18:20:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:16,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:16,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:16,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:16,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:20,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:20,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587167144] [2022-01-31 18:20:20,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587167144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:20,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:20,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:20:20,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380707528] [2022-01-31 18:20:20,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:20,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:20:20,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:20:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:20:20,474 INFO L87 Difference]: Start difference. First operand 495 states and 616 transitions. Second operand has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:24,913 INFO L93 Difference]: Finished difference Result 1114 states and 1479 transitions. [2022-01-31 18:20:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:20:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 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 490 [2022-01-31 18:20:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:24,915 INFO L225 Difference]: With dead ends: 1114 [2022-01-31 18:20:24,915 INFO L226 Difference]: Without dead ends: 1102 [2022-01-31 18:20:24,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7506, Invalid=7746, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:20:24,919 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 2377 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2497 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:24,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2497 Valid, 862 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:20:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-01-31 18:20:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 499. [2022-01-31 18:20:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 493 states have (on average 1.2494929006085194) internal successors, (616), 493 states have internal predecessors, (616), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-01-31 18:20:24,932 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 490 [2022-01-31 18:20:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:24,932 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-01-31 18:20:24,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-01-31 18:20:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-01-31 18:20:24,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:24,935 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:24,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:20:24,935 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash -693681629, now seen corresponding path program 120 times [2022-01-31 18:20:24,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:24,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670348088] [2022-01-31 18:20:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:24,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:24,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:24,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:25,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:28,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:28,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:28,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670348088] [2022-01-31 18:20:28,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [670348088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:28,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:28,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:20:28,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532541404] [2022-01-31 18:20:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:28,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:20:28,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:20:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:20:28,853 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:33,629 INFO L93 Difference]: Finished difference Result 1123 states and 1491 transitions. [2022-01-31 18:20:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:20:33,630 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 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 494 [2022-01-31 18:20:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:33,631 INFO L225 Difference]: With dead ends: 1123 [2022-01-31 18:20:33,631 INFO L226 Difference]: Without dead ends: 1111 [2022-01-31 18:20:33,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7629, Invalid=7871, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:20:33,632 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 2501 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2622 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2622 Valid, 868 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-31 18:20:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 503. [2022-01-31 18:20:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 497 states have (on average 1.2494969818913482) internal successors, (621), 497 states have internal predecessors, (621), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 626 transitions. [2022-01-31 18:20:33,644 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 626 transitions. Word has length 494 [2022-01-31 18:20:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:33,644 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 626 transitions. [2022-01-31 18:20:33,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 626 transitions. [2022-01-31 18:20:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-01-31 18:20:33,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:33,646 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:33,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:20:33,647 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash -988358648, now seen corresponding path program 121 times [2022-01-31 18:20:33,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:33,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958018489] [2022-01-31 18:20:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:33,650 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:33,650 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:33,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:33,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:38,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:38,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:38,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958018489] [2022-01-31 18:20:38,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958018489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:38,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:38,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:20:38,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141904986] [2022-01-31 18:20:38,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:38,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:20:38,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:20:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:20:38,136 INFO L87 Difference]: Start difference. First operand 503 states and 626 transitions. Second operand has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:42,613 INFO L93 Difference]: Finished difference Result 1132 states and 1503 transitions. [2022-01-31 18:20:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:20:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 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 498 [2022-01-31 18:20:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:42,615 INFO L225 Difference]: With dead ends: 1132 [2022-01-31 18:20:42,615 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 18:20:42,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7753, Invalid=7997, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:20:42,617 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 3026 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3148 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:42,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3148 Valid, 833 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:20:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 18:20:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 507. [2022-01-31 18:20:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 501 states have (on average 1.249500998003992) internal successors, (626), 501 states have internal predecessors, (626), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 631 transitions. [2022-01-31 18:20:42,648 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 631 transitions. Word has length 498 [2022-01-31 18:20:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:42,648 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 631 transitions. [2022-01-31 18:20:42,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 631 transitions. [2022-01-31 18:20:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 18:20:42,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:42,650 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:42,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:20:42,651 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:42,651 INFO L85 PathProgramCache]: Analyzing trace with hash 609153901, now seen corresponding path program 122 times [2022-01-31 18:20:42,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:42,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116587231] [2022-01-31 18:20:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:42,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:42,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:42,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:42,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:47,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:47,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116587231] [2022-01-31 18:20:47,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116587231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:47,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:47,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:20:47,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771508951] [2022-01-31 18:20:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:47,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:20:47,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:20:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:20:47,048 INFO L87 Difference]: Start difference. First operand 507 states and 631 transitions. Second operand has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:51,758 INFO L93 Difference]: Finished difference Result 1141 states and 1515 transitions. [2022-01-31 18:20:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:20:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 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 502 [2022-01-31 18:20:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:51,760 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 18:20:51,760 INFO L226 Difference]: Without dead ends: 1129 [2022-01-31 18:20:51,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7878, Invalid=8124, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:20:51,761 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2514 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:51,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 879 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:20:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-31 18:20:51,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 511. [2022-01-31 18:20:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 505 states have (on average 1.2495049504950495) internal successors, (631), 505 states have internal predecessors, (631), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 636 transitions. [2022-01-31 18:20:51,773 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 636 transitions. Word has length 502 [2022-01-31 18:20:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:51,773 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 636 transitions. [2022-01-31 18:20:51,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 636 transitions. [2022-01-31 18:20:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-01-31 18:20:51,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:51,775 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:51,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:20:51,776 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1450126254, now seen corresponding path program 123 times [2022-01-31 18:20:51,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:51,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149326537] [2022-01-31 18:20:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:51,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:51,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:51,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:51,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:57,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:57,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149326537] [2022-01-31 18:20:57,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [149326537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:57,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:57,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:20:57,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645943748] [2022-01-31 18:20:57,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:57,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:20:57,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:20:57,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:20:57,332 INFO L87 Difference]: Start difference. First operand 511 states and 636 transitions. Second operand has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:02,345 INFO L93 Difference]: Finished difference Result 1150 states and 1527 transitions. [2022-01-31 18:21:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 18:21:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 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 506 [2022-01-31 18:21:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:02,347 INFO L225 Difference]: With dead ends: 1150 [2022-01-31 18:21:02,347 INFO L226 Difference]: Without dead ends: 1138 [2022-01-31 18:21:02,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8004, Invalid=8252, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:21:02,348 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 2837 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:02,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2961 Valid, 884 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-01-31 18:21:02,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 515. [2022-01-31 18:21:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 509 states have (on average 1.2495088408644401) internal successors, (636), 509 states have internal predecessors, (636), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 641 transitions. [2022-01-31 18:21:02,361 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 641 transitions. Word has length 506 [2022-01-31 18:21:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:02,361 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 641 transitions. [2022-01-31 18:21:02,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 641 transitions. [2022-01-31 18:21:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-01-31 18:21:02,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:02,365 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:02,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:21:02,366 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash 125680311, now seen corresponding path program 124 times [2022-01-31 18:21:02,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:02,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501430025] [2022-01-31 18:21:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:02,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:02,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:02,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:02,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:06,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:06,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:06,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501430025] [2022-01-31 18:21:06,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501430025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:06,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:06,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:21:06,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682098925] [2022-01-31 18:21:06,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:06,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:21:06,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:21:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:21:06,682 INFO L87 Difference]: Start difference. First operand 515 states and 641 transitions. Second operand has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:11,994 INFO L93 Difference]: Finished difference Result 1159 states and 1539 transitions. [2022-01-31 18:21:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 18:21:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 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 510 [2022-01-31 18:21:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:11,996 INFO L225 Difference]: With dead ends: 1159 [2022-01-31 18:21:11,996 INFO L226 Difference]: Without dead ends: 1147 [2022-01-31 18:21:11,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8131, Invalid=8381, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:21:11,997 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 2501 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:11,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 898 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:21:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-01-31 18:21:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 519. [2022-01-31 18:21:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 513 states have (on average 1.2495126705653021) internal successors, (641), 513 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 646 transitions. [2022-01-31 18:21:12,009 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 646 transitions. Word has length 510 [2022-01-31 18:21:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:12,009 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 646 transitions. [2022-01-31 18:21:12,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 646 transitions. [2022-01-31 18:21:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-01-31 18:21:12,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:12,012 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:12,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 18:21:12,012 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1041688220, now seen corresponding path program 125 times [2022-01-31 18:21:12,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795328708] [2022-01-31 18:21:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:12,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:12,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:12,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:12,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:17,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:17,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795328708] [2022-01-31 18:21:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [795328708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:17,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:17,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 18:21:17,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952889384] [2022-01-31 18:21:17,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:17,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 18:21:17,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 18:21:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:21:17,904 INFO L87 Difference]: Start difference. First operand 519 states and 646 transitions. Second operand has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:23,581 INFO L93 Difference]: Finished difference Result 1168 states and 1551 transitions. [2022-01-31 18:21:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 18:21:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 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 514 [2022-01-31 18:21:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:23,585 INFO L225 Difference]: With dead ends: 1168 [2022-01-31 18:21:23,585 INFO L226 Difference]: Without dead ends: 1156 [2022-01-31 18:21:23,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:21:23,587 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2895 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3021 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:23,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3021 Valid, 866 Invalid, 2570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-01-31 18:21:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 523. [2022-01-31 18:21:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 517 states have (on average 1.2495164410058026) internal successors, (646), 517 states have internal predecessors, (646), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 651 transitions. [2022-01-31 18:21:23,630 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 651 transitions. Word has length 514 [2022-01-31 18:21:23,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:23,630 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 651 transitions. [2022-01-31 18:21:23,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 651 transitions. [2022-01-31 18:21:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-01-31 18:21:23,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:23,633 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:23,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 18:21:23,633 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash -356673535, now seen corresponding path program 126 times [2022-01-31 18:21:23,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:23,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010758229] [2022-01-31 18:21:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:23,637 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:23,637 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:23,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:23,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:30,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:30,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010758229] [2022-01-31 18:21:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010758229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:30,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:30,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 18:21:30,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804360458] [2022-01-31 18:21:30,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:30,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 18:21:30,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 18:21:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:21:30,418 INFO L87 Difference]: Start difference. First operand 523 states and 651 transitions. Second operand has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:36,846 INFO L93 Difference]: Finished difference Result 1177 states and 1563 transitions. [2022-01-31 18:21:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 18:21:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 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 518 [2022-01-31 18:21:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:36,849 INFO L225 Difference]: With dead ends: 1177 [2022-01-31 18:21:36,849 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 18:21:36,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8388, Invalid=8642, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:21:36,852 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2488 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2615 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:36,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2615 Valid, 908 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 18:21:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 527. [2022-01-31 18:21:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 521 states have (on average 1.2495201535508638) internal successors, (651), 521 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 656 transitions. [2022-01-31 18:21:36,875 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 656 transitions. Word has length 518 [2022-01-31 18:21:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:36,876 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 656 transitions. [2022-01-31 18:21:36,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 656 transitions. [2022-01-31 18:21:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-01-31 18:21:36,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:36,879 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:36,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 18:21:36,880 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:36,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:36,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1741484314, now seen corresponding path program 127 times [2022-01-31 18:21:36,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:36,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332929816] [2022-01-31 18:21:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:36,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:36,884 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:36,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:37,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:42,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:42,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332929816] [2022-01-31 18:21:42,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [332929816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:42,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:42,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 18:21:42,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704945855] [2022-01-31 18:21:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:42,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 18:21:42,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 18:21:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:21:42,649 INFO L87 Difference]: Start difference. First operand 527 states and 656 transitions. Second operand has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:48,729 INFO L93 Difference]: Finished difference Result 1186 states and 1575 transitions. [2022-01-31 18:21:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 18:21:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 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 522 [2022-01-31 18:21:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:48,745 INFO L225 Difference]: With dead ends: 1186 [2022-01-31 18:21:48,745 INFO L226 Difference]: Without dead ends: 1174 [2022-01-31 18:21:48,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8518, Invalid=8774, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:21:48,747 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 2618 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:48,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2746 Valid, 920 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-31 18:21:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 531. [2022-01-31 18:21:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.2495238095238095) internal successors, (656), 525 states have internal predecessors, (656), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 661 transitions. [2022-01-31 18:21:48,761 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 661 transitions. Word has length 522 [2022-01-31 18:21:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:48,762 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 661 transitions. [2022-01-31 18:21:48,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 661 transitions. [2022-01-31 18:21:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 18:21:48,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:48,764 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:48,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 18:21:48,764 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash 244878155, now seen corresponding path program 128 times [2022-01-31 18:21:48,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:48,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041421763] [2022-01-31 18:21:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:48,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:48,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:48,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:48,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:54,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:54,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041421763] [2022-01-31 18:21:54,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041421763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:54,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:54,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 18:21:54,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270846759] [2022-01-31 18:21:54,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:54,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 18:21:54,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 18:21:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:21:54,593 INFO L87 Difference]: Start difference. First operand 531 states and 661 transitions. Second operand has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:00,461 INFO L93 Difference]: Finished difference Result 1195 states and 1587 transitions. [2022-01-31 18:22:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 18:22:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 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 526 [2022-01-31 18:22:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:00,463 INFO L225 Difference]: With dead ends: 1195 [2022-01-31 18:22:00,464 INFO L226 Difference]: Without dead ends: 1183 [2022-01-31 18:22:00,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8649, Invalid=8907, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:22:00,465 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3127 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:00,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3256 Valid, 875 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-31 18:22:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 535. [2022-01-31 18:22:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 529 states have (on average 1.2495274102079394) internal successors, (661), 529 states have internal predecessors, (661), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 666 transitions. [2022-01-31 18:22:00,478 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 666 transitions. Word has length 526 [2022-01-31 18:22:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:00,479 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 666 transitions. [2022-01-31 18:22:00,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 666 transitions. [2022-01-31 18:22:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 18:22:00,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:00,481 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:00,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 18:22:00,481 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1552986832, now seen corresponding path program 129 times [2022-01-31 18:22:00,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:00,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886185379] [2022-01-31 18:22:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:00,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:00,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:00,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:00,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:05,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886185379] [2022-01-31 18:22:05,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [886185379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:05,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:05,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 18:22:05,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087501031] [2022-01-31 18:22:05,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:05,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 18:22:05,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 18:22:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:22:05,633 INFO L87 Difference]: Start difference. First operand 535 states and 666 transitions. Second operand has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:11,742 INFO L93 Difference]: Finished difference Result 1204 states and 1599 transitions. [2022-01-31 18:22:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 18:22:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 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 530 [2022-01-31 18:22:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:11,744 INFO L225 Difference]: With dead ends: 1204 [2022-01-31 18:22:11,744 INFO L226 Difference]: Without dead ends: 1192 [2022-01-31 18:22:11,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=8781, Invalid=9041, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:22:11,745 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 2851 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:11,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2981 Valid, 917 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-01-31 18:22:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 539. [2022-01-31 18:22:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 533 states have (on average 1.24953095684803) internal successors, (666), 533 states have internal predecessors, (666), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 671 transitions. [2022-01-31 18:22:11,759 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 671 transitions. Word has length 530 [2022-01-31 18:22:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:11,759 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 671 transitions. [2022-01-31 18:22:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 671 transitions. [2022-01-31 18:22:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-01-31 18:22:11,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:11,762 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:11,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 18:22:11,762 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1986489195, now seen corresponding path program 130 times [2022-01-31 18:22:11,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:11,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559238984] [2022-01-31 18:22:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:11,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:11,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:11,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:11,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:16,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:16,338 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:16,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559238984] [2022-01-31 18:22:16,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559238984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:16,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:16,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 18:22:16,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040787816] [2022-01-31 18:22:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:16,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 18:22:16,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 18:22:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:22:16,343 INFO L87 Difference]: Start difference. First operand 539 states and 671 transitions. Second operand has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:22,719 INFO L93 Difference]: Finished difference Result 1213 states and 1611 transitions. [2022-01-31 18:22:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 18:22:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 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 534 [2022-01-31 18:22:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:22,721 INFO L225 Difference]: With dead ends: 1213 [2022-01-31 18:22:22,721 INFO L226 Difference]: Without dead ends: 1201 [2022-01-31 18:22:22,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8914, Invalid=9176, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:22:22,722 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 3182 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3313 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:22,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3313 Valid, 886 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:22:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-31 18:22:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 543. [2022-01-31 18:22:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 537 states have (on average 1.2495344506517692) internal successors, (671), 537 states have internal predecessors, (671), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 676 transitions. [2022-01-31 18:22:22,736 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 676 transitions. Word has length 534 [2022-01-31 18:22:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 676 transitions. [2022-01-31 18:22:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 676 transitions. [2022-01-31 18:22:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-01-31 18:22:22,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:22,739 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:22,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 18:22:22,739 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash 559260026, now seen corresponding path program 131 times [2022-01-31 18:22:22,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576779417] [2022-01-31 18:22:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:22,743 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:22,743 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:22,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:22,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:29,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576779417] [2022-01-31 18:22:29,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576779417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:29,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:29,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 18:22:29,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059055053] [2022-01-31 18:22:29,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:29,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 18:22:29,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 18:22:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:22:29,060 INFO L87 Difference]: Start difference. First operand 543 states and 676 transitions. Second operand has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:34,729 INFO L93 Difference]: Finished difference Result 1222 states and 1623 transitions. [2022-01-31 18:22:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 18:22:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 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 538 [2022-01-31 18:22:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:34,731 INFO L225 Difference]: With dead ends: 1222 [2022-01-31 18:22:34,731 INFO L226 Difference]: Without dead ends: 1210 [2022-01-31 18:22:34,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9048, Invalid=9312, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 18:22:34,732 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 2859 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2991 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:34,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2991 Valid, 911 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:22:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-01-31 18:22:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 547. [2022-01-31 18:22:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 541 states have (on average 1.2495378927911276) internal successors, (676), 541 states have internal predecessors, (676), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 681 transitions. [2022-01-31 18:22:34,745 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 681 transitions. Word has length 538 [2022-01-31 18:22:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:34,746 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 681 transitions. [2022-01-31 18:22:34,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 681 transitions. [2022-01-31 18:22:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-01-31 18:22:34,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:34,748 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:34,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 18:22:34,748 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1212658655, now seen corresponding path program 132 times [2022-01-31 18:22:34,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:34,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239568969] [2022-01-31 18:22:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:34,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:34,752 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:34,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:34,889 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:39,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:39,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239568969] [2022-01-31 18:22:39,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239568969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:39,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:39,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 18:22:39,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763140191] [2022-01-31 18:22:39,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:39,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 18:22:39,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 18:22:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 18:22:39,407 INFO L87 Difference]: Start difference. First operand 547 states and 681 transitions. Second operand has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:45,542 INFO L93 Difference]: Finished difference Result 1231 states and 1635 transitions. [2022-01-31 18:22:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 18:22:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 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 542 [2022-01-31 18:22:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:45,544 INFO L225 Difference]: With dead ends: 1231 [2022-01-31 18:22:45,544 INFO L226 Difference]: Without dead ends: 1219 [2022-01-31 18:22:45,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9183, Invalid=9449, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:22:45,545 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 2964 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 1183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1183 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:45,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3097 Valid, 935 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1183 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-01-31 18:22:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 551. [2022-01-31 18:22:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 545 states have (on average 1.2495412844036697) internal successors, (681), 545 states have internal predecessors, (681), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 686 transitions. [2022-01-31 18:22:45,559 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 686 transitions. Word has length 542 [2022-01-31 18:22:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:45,559 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 686 transitions. [2022-01-31 18:22:45,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 686 transitions. [2022-01-31 18:22:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-01-31 18:22:45,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:45,562 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:45,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 18:22:45,562 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1452274748, now seen corresponding path program 133 times [2022-01-31 18:22:45,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:45,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250420923] [2022-01-31 18:22:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:45,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:45,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:45,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:45,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:51,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:51,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:51,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250420923] [2022-01-31 18:22:51,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [250420923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:51,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:51,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 18:22:51,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304765442] [2022-01-31 18:22:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:51,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 18:22:51,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 18:22:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:22:51,188 INFO L87 Difference]: Start difference. First operand 551 states and 686 transitions. Second operand has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:57,501 INFO L93 Difference]: Finished difference Result 1240 states and 1647 transitions. [2022-01-31 18:22:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 18:22:57,501 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 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 546 [2022-01-31 18:22:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:57,503 INFO L225 Difference]: With dead ends: 1240 [2022-01-31 18:22:57,503 INFO L226 Difference]: Without dead ends: 1228 [2022-01-31 18:22:57,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9319, Invalid=9587, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 18:22:57,504 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 3391 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:57,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3525 Valid, 934 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1389 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-31 18:22:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 555. [2022-01-31 18:22:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 549 states have (on average 1.2495446265938068) internal successors, (686), 549 states have internal predecessors, (686), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 691 transitions. [2022-01-31 18:22:57,518 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 691 transitions. Word has length 546 [2022-01-31 18:22:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:57,518 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 691 transitions. [2022-01-31 18:22:57,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 691 transitions. [2022-01-31 18:22:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 18:22:57,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:57,520 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 18:22:57,521 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 221243689, now seen corresponding path program 134 times [2022-01-31 18:22:57,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:57,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498420926] [2022-01-31 18:22:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:57,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:57,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:57,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:57,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:02,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:02,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498420926] [2022-01-31 18:23:02,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [498420926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:02,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:02,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 18:23:02,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768507115] [2022-01-31 18:23:02,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:02,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 18:23:02,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 18:23:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 18:23:02,982 INFO L87 Difference]: Start difference. First operand 555 states and 691 transitions. Second operand has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:09,167 INFO L93 Difference]: Finished difference Result 1249 states and 1659 transitions. [2022-01-31 18:23:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 18:23:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 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 550 [2022-01-31 18:23:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:09,170 INFO L225 Difference]: With dead ends: 1249 [2022-01-31 18:23:09,171 INFO L226 Difference]: Without dead ends: 1237 [2022-01-31 18:23:09,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9456, Invalid=9726, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:23:09,172 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2863 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:09,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 940 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:23:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-31 18:23:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 559. [2022-01-31 18:23:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 553 states have (on average 1.2495479204339963) internal successors, (691), 553 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 696 transitions. [2022-01-31 18:23:09,185 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 696 transitions. Word has length 550 [2022-01-31 18:23:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:09,186 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 696 transitions. [2022-01-31 18:23:09,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 696 transitions. [2022-01-31 18:23:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-01-31 18:23:09,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:09,188 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:09,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 18:23:09,188 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1454863346, now seen corresponding path program 135 times [2022-01-31 18:23:09,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:09,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940498809] [2022-01-31 18:23:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:09,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:09,193 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:09,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:09,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:15,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:15,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940498809] [2022-01-31 18:23:15,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940498809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:15,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:15,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 18:23:15,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54234700] [2022-01-31 18:23:15,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:15,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 18:23:15,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 18:23:15,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:23:15,189 INFO L87 Difference]: Start difference. First operand 559 states and 696 transitions. Second operand has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:21,870 INFO L93 Difference]: Finished difference Result 1258 states and 1671 transitions. [2022-01-31 18:23:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 18:23:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 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 554 [2022-01-31 18:23:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:21,872 INFO L225 Difference]: With dead ends: 1258 [2022-01-31 18:23:21,873 INFO L226 Difference]: Without dead ends: 1246 [2022-01-31 18:23:21,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9594, Invalid=9866, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 18:23:21,874 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 3456 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 1410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3592 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1410 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:21,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3592 Valid, 931 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1410 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:23:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-01-31 18:23:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 563. [2022-01-31 18:23:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 557 states have (on average 1.2495511669658887) internal successors, (696), 557 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 701 transitions. [2022-01-31 18:23:21,888 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 701 transitions. Word has length 554 [2022-01-31 18:23:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:21,888 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 701 transitions. [2022-01-31 18:23:21,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 701 transitions. [2022-01-31 18:23:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-01-31 18:23:21,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:21,890 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:21,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 18:23:21,890 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1893414003, now seen corresponding path program 136 times [2022-01-31 18:23:21,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:21,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574798632] [2022-01-31 18:23:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:21,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:21,894 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:21,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:22,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:27,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:27,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:27,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574798632] [2022-01-31 18:23:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574798632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:27,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:27,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 18:23:27,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661019414] [2022-01-31 18:23:27,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:27,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 18:23:27,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:27,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 18:23:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 18:23:27,491 INFO L87 Difference]: Start difference. First operand 563 states and 701 transitions. Second operand has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:34,751 INFO L93 Difference]: Finished difference Result 1267 states and 1683 transitions. [2022-01-31 18:23:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 18:23:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 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 558 [2022-01-31 18:23:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:34,753 INFO L225 Difference]: With dead ends: 1267 [2022-01-31 18:23:34,753 INFO L226 Difference]: Without dead ends: 1255 [2022-01-31 18:23:34,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9733, Invalid=10007, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:23:34,754 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 2825 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 1096 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2962 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1096 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:34,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2962 Valid, 945 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1096 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:23:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-01-31 18:23:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 567. [2022-01-31 18:23:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 561 states have (on average 1.249554367201426) internal successors, (701), 561 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 706 transitions. [2022-01-31 18:23:34,768 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 706 transitions. Word has length 558 [2022-01-31 18:23:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:34,768 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 706 transitions. [2022-01-31 18:23:34,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 706 transitions. [2022-01-31 18:23:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2022-01-31 18:23:34,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:34,771 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:34,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 18:23:34,772 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1684611672, now seen corresponding path program 137 times [2022-01-31 18:23:34,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529642883] [2022-01-31 18:23:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:34,784 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:34,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:34,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:34,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:40,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:40,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529642883] [2022-01-31 18:23:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1529642883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:40,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:40,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 18:23:40,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367304979] [2022-01-31 18:23:40,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:40,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 18:23:40,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 18:23:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:23:40,364 INFO L87 Difference]: Start difference. First operand 567 states and 706 transitions. Second operand has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:47,330 INFO L93 Difference]: Finished difference Result 1276 states and 1695 transitions. [2022-01-31 18:23:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 18:23:47,331 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 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 562 [2022-01-31 18:23:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:47,333 INFO L225 Difference]: With dead ends: 1276 [2022-01-31 18:23:47,333 INFO L226 Difference]: Without dead ends: 1264 [2022-01-31 18:23:47,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9873, Invalid=10149, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 18:23:47,334 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2611 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:47,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 958 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:23:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-01-31 18:23:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 571. [2022-01-31 18:23:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 565 states have (on average 1.2495575221238937) internal successors, (706), 565 states have internal predecessors, (706), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 711 transitions. [2022-01-31 18:23:47,348 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 711 transitions. Word has length 562 [2022-01-31 18:23:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 711 transitions. [2022-01-31 18:23:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 711 transitions. [2022-01-31 18:23:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 18:23:47,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:47,351 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:47,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 18:23:47,351 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -506227267, now seen corresponding path program 138 times [2022-01-31 18:23:47,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:47,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863569361] [2022-01-31 18:23:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:47,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:47,355 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:47,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:47,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:52,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:52,890 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:52,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863569361] [2022-01-31 18:23:52,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863569361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:52,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:52,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 18:23:52,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124964583] [2022-01-31 18:23:52,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:52,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 18:23:52,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 18:23:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 18:23:52,893 INFO L87 Difference]: Start difference. First operand 571 states and 711 transitions. Second operand has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:00,421 INFO L93 Difference]: Finished difference Result 1285 states and 1707 transitions. [2022-01-31 18:24:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 18:24:00,422 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 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 566 [2022-01-31 18:24:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:00,423 INFO L225 Difference]: With dead ends: 1285 [2022-01-31 18:24:00,423 INFO L226 Difference]: Without dead ends: 1273 [2022-01-31 18:24:00,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10014, Invalid=10292, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:24:00,425 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2848 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 1113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2987 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1113 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:00,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2987 Valid, 981 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1113 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:24:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-31 18:24:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 575. [2022-01-31 18:24:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 569 states have (on average 1.249560632688928) internal successors, (711), 569 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 716 transitions. [2022-01-31 18:24:00,439 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 716 transitions. Word has length 566 [2022-01-31 18:24:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:00,439 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 716 transitions. [2022-01-31 18:24:00,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 716 transitions. [2022-01-31 18:24:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-01-31 18:24:00,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:00,442 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:00,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 18:24:00,442 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash -195309918, now seen corresponding path program 139 times [2022-01-31 18:24:00,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:00,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502323881] [2022-01-31 18:24:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:00,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:00,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:00,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:00,593 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:06,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502323881] [2022-01-31 18:24:06,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502323881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:06,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:06,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 18:24:06,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84781055] [2022-01-31 18:24:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:06,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 18:24:06,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 18:24:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:24:06,563 INFO L87 Difference]: Start difference. First operand 575 states and 716 transitions. Second operand has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:13,404 INFO L93 Difference]: Finished difference Result 1294 states and 1719 transitions. [2022-01-31 18:24:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 18:24:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 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 570 [2022-01-31 18:24:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:13,406 INFO L225 Difference]: With dead ends: 1294 [2022-01-31 18:24:13,406 INFO L226 Difference]: Without dead ends: 1282 [2022-01-31 18:24:13,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=10156, Invalid=10436, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 18:24:13,407 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 3452 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 1412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3592 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1412 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:13,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3592 Valid, 975 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1412 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:24:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-01-31 18:24:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 579. [2022-01-31 18:24:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 573 states have (on average 1.24956369982548) internal successors, (716), 573 states have internal predecessors, (716), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 721 transitions. [2022-01-31 18:24:13,421 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 721 transitions. Word has length 570 [2022-01-31 18:24:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:13,422 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 721 transitions. [2022-01-31 18:24:13,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 721 transitions. [2022-01-31 18:24:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-01-31 18:24:13,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:13,428 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:13,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 18:24:13,428 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1532818169, now seen corresponding path program 140 times [2022-01-31 18:24:13,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:13,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685846794] [2022-01-31 18:24:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:13,432 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:13,432 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:13,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:13,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:19,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:19,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685846794] [2022-01-31 18:24:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685846794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:19,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:19,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 18:24:19,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779452108] [2022-01-31 18:24:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:19,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 18:24:19,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 18:24:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 18:24:19,554 INFO L87 Difference]: Start difference. First operand 579 states and 721 transitions. Second operand has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:26,703 INFO L93 Difference]: Finished difference Result 1303 states and 1731 transitions. [2022-01-31 18:24:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 18:24:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 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 574 [2022-01-31 18:24:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:26,705 INFO L225 Difference]: With dead ends: 1303 [2022-01-31 18:24:26,706 INFO L226 Difference]: Without dead ends: 1291 [2022-01-31 18:24:26,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=10299, Invalid=10581, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:24:26,707 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 2754 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2895 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:26,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2895 Valid, 997 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:24:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-31 18:24:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 583. [2022-01-31 18:24:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 577 states have (on average 1.2495667244367417) internal successors, (721), 577 states have internal predecessors, (721), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 726 transitions. [2022-01-31 18:24:26,722 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 726 transitions. Word has length 574 [2022-01-31 18:24:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:26,722 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 726 transitions. [2022-01-31 18:24:26,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 726 transitions. [2022-01-31 18:24:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-01-31 18:24:26,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:26,725 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:26,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 18:24:26,725 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1219137772, now seen corresponding path program 141 times [2022-01-31 18:24:26,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:26,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688044466] [2022-01-31 18:24:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:26,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:26,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:26,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:26,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:32,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:32,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688044466] [2022-01-31 18:24:32,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1688044466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:32,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:32,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 18:24:32,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63290940] [2022-01-31 18:24:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:32,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 18:24:32,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 18:24:32,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:24:32,878 INFO L87 Difference]: Start difference. First operand 583 states and 726 transitions. Second operand has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:39,902 INFO L93 Difference]: Finished difference Result 1312 states and 1743 transitions. [2022-01-31 18:24:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 18:24:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 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 578 [2022-01-31 18:24:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:39,904 INFO L225 Difference]: With dead ends: 1312 [2022-01-31 18:24:39,905 INFO L226 Difference]: Without dead ends: 1300 [2022-01-31 18:24:39,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=10443, Invalid=10727, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 18:24:39,906 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 3628 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 1490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3770 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1490 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:39,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3770 Valid, 979 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1490 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:24:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-31 18:24:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 587. [2022-01-31 18:24:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 581 states have (on average 1.2495697074010328) internal successors, (726), 581 states have internal predecessors, (726), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 731 transitions. [2022-01-31 18:24:39,931 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 731 transitions. Word has length 578 [2022-01-31 18:24:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:39,931 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 731 transitions. [2022-01-31 18:24:39,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 731 transitions. [2022-01-31 18:24:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 18:24:39,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:39,934 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:39,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 18:24:39,934 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash -741107119, now seen corresponding path program 142 times [2022-01-31 18:24:39,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:39,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003801367] [2022-01-31 18:24:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:39,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:39,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:39,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:40,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:47,403 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003801367] [2022-01-31 18:24:47,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2003801367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:47,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:47,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 18:24:47,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435225620] [2022-01-31 18:24:47,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:47,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 18:24:47,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:47,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 18:24:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 18:24:47,407 INFO L87 Difference]: Start difference. First operand 587 states and 731 transitions. Second operand has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:54,782 INFO L93 Difference]: Finished difference Result 1321 states and 1755 transitions. [2022-01-31 18:24:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 18:24:54,782 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 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 582 [2022-01-31 18:24:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:54,784 INFO L225 Difference]: With dead ends: 1321 [2022-01-31 18:24:54,784 INFO L226 Difference]: Without dead ends: 1309 [2022-01-31 18:24:54,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10588, Invalid=10874, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:24:54,785 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 3271 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:54,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3414 Valid, 987 Invalid, 2964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:24:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-01-31 18:24:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 591. [2022-01-31 18:24:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 585 states have (on average 1.2495726495726496) internal successors, (731), 585 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 736 transitions. [2022-01-31 18:24:54,801 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 736 transitions. Word has length 582 [2022-01-31 18:24:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:54,801 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 736 transitions. [2022-01-31 18:24:54,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 736 transitions. [2022-01-31 18:24:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-31 18:24:54,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:54,804 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:54,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 18:24:54,804 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash 652175670, now seen corresponding path program 143 times [2022-01-31 18:24:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:54,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773256475] [2022-01-31 18:24:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:54,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:54,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:54,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:54,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:00,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:00,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773256475] [2022-01-31 18:25:00,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [773256475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:00,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:00,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 18:25:00,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901866482] [2022-01-31 18:25:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:00,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 18:25:00,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:00,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 18:25:00,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:25:00,656 INFO L87 Difference]: Start difference. First operand 591 states and 736 transitions. Second operand has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:08,145 INFO L93 Difference]: Finished difference Result 1330 states and 1767 transitions. [2022-01-31 18:25:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 18:25:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 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 586 [2022-01-31 18:25:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:08,147 INFO L225 Difference]: With dead ends: 1330 [2022-01-31 18:25:08,147 INFO L226 Difference]: Without dead ends: 1318 [2022-01-31 18:25:08,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10734, Invalid=11022, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 18:25:08,148 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 2987 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 1162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3131 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:08,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3131 Valid, 1014 Invalid, 2763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1162 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:25:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-01-31 18:25:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 595. [2022-01-31 18:25:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 589 states have (on average 1.2495755517826825) internal successors, (736), 589 states have internal predecessors, (736), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 741 transitions. [2022-01-31 18:25:08,163 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 741 transitions. Word has length 586 [2022-01-31 18:25:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:08,164 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 741 transitions. [2022-01-31 18:25:08,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 741 transitions. [2022-01-31 18:25:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-01-31 18:25:08,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:08,166 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:08,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 18:25:08,166 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:08,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1609514395, now seen corresponding path program 144 times [2022-01-31 18:25:08,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:08,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644726959] [2022-01-31 18:25:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:08,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:08,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:08,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:08,385 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:13,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:13,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644726959] [2022-01-31 18:25:13,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644726959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:13,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:13,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 18:25:13,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476026985] [2022-01-31 18:25:13,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:13,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 18:25:13,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 18:25:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 18:25:13,403 INFO L87 Difference]: Start difference. First operand 595 states and 741 transitions. Second operand has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:21,647 INFO L93 Difference]: Finished difference Result 1339 states and 1779 transitions. [2022-01-31 18:25:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 18:25:21,648 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 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 590 [2022-01-31 18:25:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:21,649 INFO L225 Difference]: With dead ends: 1339 [2022-01-31 18:25:21,650 INFO L226 Difference]: Without dead ends: 1327 [2022-01-31 18:25:21,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10881, Invalid=11171, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:25:21,651 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 3430 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3575 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:21,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3575 Valid, 1029 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:25:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-01-31 18:25:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 599. [2022-01-31 18:25:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 593 states have (on average 1.2495784148397977) internal successors, (741), 593 states have internal predecessors, (741), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 746 transitions. [2022-01-31 18:25:21,666 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 746 transitions. Word has length 590 [2022-01-31 18:25:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 746 transitions. [2022-01-31 18:25:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 746 transitions. [2022-01-31 18:25:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2022-01-31 18:25:21,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:21,669 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:21,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 18:25:21,670 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash 713316224, now seen corresponding path program 145 times [2022-01-31 18:25:21,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574409518] [2022-01-31 18:25:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:21,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:21,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:21,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:21,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:27,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:27,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:27,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574409518] [2022-01-31 18:25:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574409518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:27,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:27,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 18:25:27,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685437058] [2022-01-31 18:25:27,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:27,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 18:25:27,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 18:25:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:25:27,753 INFO L87 Difference]: Start difference. First operand 599 states and 746 transitions. Second operand has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:35,675 INFO L93 Difference]: Finished difference Result 1348 states and 1791 transitions. [2022-01-31 18:25:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 18:25:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 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 594 [2022-01-31 18:25:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:35,677 INFO L225 Difference]: With dead ends: 1348 [2022-01-31 18:25:35,677 INFO L226 Difference]: Without dead ends: 1336 [2022-01-31 18:25:35,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11029, Invalid=11321, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 18:25:35,678 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 3077 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3223 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:35,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3223 Valid, 1041 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:25:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-01-31 18:25:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 603. [2022-01-31 18:25:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 597 states have (on average 1.2495812395309882) internal successors, (746), 597 states have internal predecessors, (746), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 751 transitions. [2022-01-31 18:25:35,694 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 751 transitions. Word has length 594 [2022-01-31 18:25:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:35,694 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 751 transitions. [2022-01-31 18:25:35,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 751 transitions. [2022-01-31 18:25:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-01-31 18:25:35,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:35,697 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:35,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 18:25:35,697 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash 260044517, now seen corresponding path program 146 times [2022-01-31 18:25:35,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:35,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340357924] [2022-01-31 18:25:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:35,718 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:35,718 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:35,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:35,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:43,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:43,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340357924] [2022-01-31 18:25:43,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [340357924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:43,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:43,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 18:25:43,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022695705] [2022-01-31 18:25:43,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:43,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 18:25:43,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 18:25:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 18:25:43,591 INFO L87 Difference]: Start difference. First operand 603 states and 751 transitions. Second operand has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:51,730 INFO L93 Difference]: Finished difference Result 1357 states and 1803 transitions. [2022-01-31 18:25:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 18:25:51,730 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 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 598 [2022-01-31 18:25:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:51,732 INFO L225 Difference]: With dead ends: 1357 [2022-01-31 18:25:51,732 INFO L226 Difference]: Without dead ends: 1345 [2022-01-31 18:25:51,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11178, Invalid=11472, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:25:51,733 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 2989 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3136 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1159 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:51,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3136 Valid, 1027 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1159 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:25:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-01-31 18:25:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 607. [2022-01-31 18:25:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 601 states have (on average 1.2495840266222962) internal successors, (751), 601 states have internal predecessors, (751), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 756 transitions. [2022-01-31 18:25:51,749 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 756 transitions. Word has length 598 [2022-01-31 18:25:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 756 transitions. [2022-01-31 18:25:51,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 756 transitions. [2022-01-31 18:25:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2022-01-31 18:25:51,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:51,752 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 18:25:51,752 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash -987538486, now seen corresponding path program 147 times [2022-01-31 18:25:51,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:51,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837136148] [2022-01-31 18:25:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:51,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:51,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:51,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:51,917 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:57,787 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:57,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837136148] [2022-01-31 18:25:57,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837136148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:57,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:57,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 18:25:57,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541065854] [2022-01-31 18:25:57,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:57,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 18:25:57,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 18:25:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:25:57,791 INFO L87 Difference]: Start difference. First operand 607 states and 756 transitions. Second operand has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:05,790 INFO L93 Difference]: Finished difference Result 1366 states and 1815 transitions. [2022-01-31 18:26:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 18:26:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 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 602 [2022-01-31 18:26:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:05,792 INFO L225 Difference]: With dead ends: 1366 [2022-01-31 18:26:05,792 INFO L226 Difference]: Without dead ends: 1354 [2022-01-31 18:26:05,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11328, Invalid=11624, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 18:26:05,793 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 3504 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3652 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:05,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3652 Valid, 1008 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:26:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-01-31 18:26:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 611. [2022-01-31 18:26:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 605 states have (on average 1.2495867768595041) internal successors, (756), 605 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 761 transitions. [2022-01-31 18:26:05,810 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 761 transitions. Word has length 602 [2022-01-31 18:26:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 761 transitions. [2022-01-31 18:26:05,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 761 transitions. [2022-01-31 18:26:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 18:26:05,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:05,813 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 18:26:05,813 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2131740207, now seen corresponding path program 148 times [2022-01-31 18:26:05,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:05,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994074209] [2022-01-31 18:26:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:05,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:05,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:05,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:05,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:13,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:13,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994074209] [2022-01-31 18:26:13,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1994074209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:13,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:13,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 18:26:13,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119896590] [2022-01-31 18:26:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 18:26:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 18:26:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 18:26:13,464 INFO L87 Difference]: Start difference. First operand 611 states and 761 transitions. Second operand has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:21,797 INFO L93 Difference]: Finished difference Result 1375 states and 1827 transitions. [2022-01-31 18:26:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 18:26:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 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 606 [2022-01-31 18:26:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:21,799 INFO L225 Difference]: With dead ends: 1375 [2022-01-31 18:26:21,799 INFO L226 Difference]: Without dead ends: 1363 [2022-01-31 18:26:21,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=11479, Invalid=11777, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:26:21,800 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 3405 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 1347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3554 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1347 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:21,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3554 Valid, 1006 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1347 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:26:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2022-01-31 18:26:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 615. [2022-01-31 18:26:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 609 states have (on average 1.2495894909688012) internal successors, (761), 609 states have internal predecessors, (761), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 766 transitions. [2022-01-31 18:26:21,816 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 766 transitions. Word has length 606 [2022-01-31 18:26:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:21,816 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 766 transitions. [2022-01-31 18:26:21,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 766 transitions. [2022-01-31 18:26:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2022-01-31 18:26:21,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:21,819 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 18:26:21,819 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1044805140, now seen corresponding path program 149 times [2022-01-31 18:26:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141622994] [2022-01-31 18:26:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:21,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:21,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:21,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:22,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:28,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:28,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:28,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141622994] [2022-01-31 18:26:28,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141622994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:28,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:28,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 18:26:28,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373763892] [2022-01-31 18:26:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:28,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 18:26:28,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 18:26:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:26:28,566 INFO L87 Difference]: Start difference. First operand 615 states and 766 transitions. Second operand has 153 states, 153 states have (on average 3.9607843137254903) internal successors, (606), 152 states have internal predecessors, (606), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:37,819 INFO L93 Difference]: Finished difference Result 1384 states and 1839 transitions. [2022-01-31 18:26:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 18:26:37,820 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 3.9607843137254903) internal successors, (606), 152 states have internal predecessors, (606), 2 states have call successors, (3), 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 610 [2022-01-31 18:26:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:37,822 INFO L225 Difference]: With dead ends: 1384 [2022-01-31 18:26:37,822 INFO L226 Difference]: Without dead ends: 1372 [2022-01-31 18:26:37,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=11631, Invalid=11931, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 18:26:37,823 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 3328 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 1313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3478 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:37,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3478 Valid, 1016 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1313 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:26:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-01-31 18:26:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 619. [2022-01-31 18:26:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 613 states have (on average 1.2495921696574226) internal successors, (766), 613 states have internal predecessors, (766), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 771 transitions. [2022-01-31 18:26:37,839 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 771 transitions. Word has length 610 [2022-01-31 18:26:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:37,840 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 771 transitions. [2022-01-31 18:26:37,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 3.9607843137254903) internal successors, (606), 152 states have internal predecessors, (606), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 771 transitions. [2022-01-31 18:26:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-01-31 18:26:37,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:37,843 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 150, 150, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 18:26:37,843 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash 556313465, now seen corresponding path program 150 times [2022-01-31 18:26:37,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:37,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046018629] [2022-01-31 18:26:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:37,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:37,846 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:37,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:38,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:44,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:44,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046018629] [2022-01-31 18:26:44,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046018629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:44,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:44,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 18:26:44,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362333750] [2022-01-31 18:26:44,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:44,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 18:26:44,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 18:26:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 18:26:44,946 INFO L87 Difference]: Start difference. First operand 619 states and 771 transitions. Second operand has 154 states, 154 states have (on average 3.961038961038961) internal successors, (610), 153 states have internal predecessors, (610), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:54,365 INFO L93 Difference]: Finished difference Result 1393 states and 1851 transitions. [2022-01-31 18:26:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 18:26:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.961038961038961) internal successors, (610), 153 states have internal predecessors, (610), 2 states have call successors, (3), 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 614 [2022-01-31 18:26:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:54,368 INFO L225 Difference]: With dead ends: 1393 [2022-01-31 18:26:54,368 INFO L226 Difference]: Without dead ends: 1381 [2022-01-31 18:26:54,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=11784, Invalid=12086, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:26:54,369 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 2873 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3024 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:54,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3024 Valid, 1087 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:26:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-01-31 18:26:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 623. [2022-01-31 18:26:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 617 states have (on average 1.2495948136142625) internal successors, (771), 617 states have internal predecessors, (771), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 776 transitions. [2022-01-31 18:26:54,385 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 776 transitions. Word has length 614 [2022-01-31 18:26:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:54,386 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 776 transitions. [2022-01-31 18:26:54,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.961038961038961) internal successors, (610), 153 states have internal predecessors, (610), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 776 transitions. [2022-01-31 18:26:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2022-01-31 18:26:54,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:54,389 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 151, 151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:54,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 18:26:54,389 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:54,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1284004258, now seen corresponding path program 151 times [2022-01-31 18:26:54,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:54,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341701632] [2022-01-31 18:26:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:54,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:54,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:54,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:54,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:02,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:02,653 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341701632] [2022-01-31 18:27:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341701632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:02,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:02,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 18:27:02,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706306799] [2022-01-31 18:27:02,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:02,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 18:27:02,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 18:27:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:27:02,660 INFO L87 Difference]: Start difference. First operand 623 states and 776 transitions. Second operand has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 154 states have internal predecessors, (614), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:11,988 INFO L93 Difference]: Finished difference Result 1402 states and 1863 transitions. [2022-01-31 18:27:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 18:27:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 154 states have internal predecessors, (614), 2 states have call successors, (3), 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 618 [2022-01-31 18:27:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:11,991 INFO L225 Difference]: With dead ends: 1402 [2022-01-31 18:27:11,991 INFO L226 Difference]: Without dead ends: 1390 [2022-01-31 18:27:11,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=11938, Invalid=12242, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 18:27:11,992 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 3555 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 1427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3707 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1427 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:11,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3707 Valid, 1040 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1427 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:27:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2022-01-31 18:27:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 627. [2022-01-31 18:27:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 621 states have (on average 1.249597423510467) internal successors, (776), 621 states have internal predecessors, (776), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 781 transitions. [2022-01-31 18:27:12,008 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 781 transitions. Word has length 618 [2022-01-31 18:27:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:12,008 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 781 transitions. [2022-01-31 18:27:12,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 154 states have internal predecessors, (614), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 781 transitions. [2022-01-31 18:27:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-01-31 18:27:12,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:12,011 INFO L514 BasicCegarLoop]: trace histogram [152, 152, 152, 152, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:12,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 18:27:12,011 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1045735107, now seen corresponding path program 152 times [2022-01-31 18:27:12,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874076108] [2022-01-31 18:27:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:12,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:12,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:27:12,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:12,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:19,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:19,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874076108] [2022-01-31 18:27:19,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874076108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:19,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:19,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 18:27:19,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079006724] [2022-01-31 18:27:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:19,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 18:27:19,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 18:27:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 18:27:19,594 INFO L87 Difference]: Start difference. First operand 627 states and 781 transitions. Second operand has 156 states, 156 states have (on average 3.9615384615384617) internal successors, (618), 155 states have internal predecessors, (618), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:30,348 INFO L93 Difference]: Finished difference Result 1411 states and 1875 transitions. [2022-01-31 18:27:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 18:27:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 3.9615384615384617) internal successors, (618), 155 states have internal predecessors, (618), 2 states have call successors, (3), 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 622 [2022-01-31 18:27:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:30,350 INFO L225 Difference]: With dead ends: 1411 [2022-01-31 18:27:30,350 INFO L226 Difference]: Without dead ends: 1399 [2022-01-31 18:27:30,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=12093, Invalid=12399, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:27:30,351 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 2986 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 1144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3139 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:30,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3139 Valid, 1060 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1144 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:27:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-01-31 18:27:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 631. [2022-01-31 18:27:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 625 states have (on average 1.2496) internal successors, (781), 625 states have internal predecessors, (781), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 786 transitions. [2022-01-31 18:27:30,369 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 786 transitions. Word has length 622 [2022-01-31 18:27:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:30,369 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 786 transitions. [2022-01-31 18:27:30,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 3.9615384615384617) internal successors, (618), 155 states have internal predecessors, (618), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 786 transitions. [2022-01-31 18:27:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-01-31 18:27:30,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:30,372 INFO L514 BasicCegarLoop]: trace histogram [153, 153, 153, 153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:30,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 18:27:30,372 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash 406908072, now seen corresponding path program 153 times [2022-01-31 18:27:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63006998] [2022-01-31 18:27:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:30,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:30,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:27:30,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:30,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:37,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:37,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63006998] [2022-01-31 18:27:37,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [63006998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:37,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:37,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-01-31 18:27:37,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635583355] [2022-01-31 18:27:37,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:37,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-01-31 18:27:37,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-01-31 18:27:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:27:37,597 INFO L87 Difference]: Start difference. First operand 631 states and 786 transitions. Second operand has 157 states, 157 states have (on average 3.961783439490446) internal successors, (622), 156 states have internal predecessors, (622), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:47,512 INFO L93 Difference]: Finished difference Result 1420 states and 1887 transitions. [2022-01-31 18:27:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 18:27:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 3.961783439490446) internal successors, (622), 156 states have internal predecessors, (622), 2 states have call successors, (3), 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 626 [2022-01-31 18:27:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:47,515 INFO L225 Difference]: With dead ends: 1420 [2022-01-31 18:27:47,515 INFO L226 Difference]: Without dead ends: 1408 [2022-01-31 18:27:47,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=12249, Invalid=12557, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 18:27:47,516 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 3140 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3294 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:47,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3294 Valid, 1067 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1220 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:27:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-01-31 18:27:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 635. [2022-01-31 18:27:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 629 states have (on average 1.2496025437201908) internal successors, (786), 629 states have internal predecessors, (786), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 791 transitions. [2022-01-31 18:27:47,533 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 791 transitions. Word has length 626 [2022-01-31 18:27:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:47,533 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 791 transitions. [2022-01-31 18:27:47,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 3.961783439490446) internal successors, (622), 156 states have internal predecessors, (622), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 791 transitions. [2022-01-31 18:27:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2022-01-31 18:27:47,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:47,536 INFO L514 BasicCegarLoop]: trace histogram [154, 154, 154, 154, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:47,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 18:27:47,536 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -182601715, now seen corresponding path program 154 times [2022-01-31 18:27:47,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:47,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142481414] [2022-01-31 18:27:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:47,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:47,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:27:47,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:47,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:54,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:54,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142481414] [2022-01-31 18:27:54,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [142481414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:54,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:54,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 18:27:54,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149048192] [2022-01-31 18:27:54,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:54,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 18:27:54,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 18:27:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 18:27:54,427 INFO L87 Difference]: Start difference. First operand 635 states and 791 transitions. Second operand has 158 states, 158 states have (on average 3.962025316455696) internal successors, (626), 157 states have internal predecessors, (626), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:06,011 INFO L93 Difference]: Finished difference Result 1429 states and 1899 transitions. [2022-01-31 18:28:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 18:28:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.962025316455696) internal successors, (626), 157 states have internal predecessors, (626), 2 states have call successors, (3), 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 630 [2022-01-31 18:28:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:06,013 INFO L225 Difference]: With dead ends: 1429 [2022-01-31 18:28:06,013 INFO L226 Difference]: Without dead ends: 1417 [2022-01-31 18:28:06,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=12406, Invalid=12716, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:28:06,014 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 3414 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3569 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:06,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3569 Valid, 1091 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:28:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2022-01-31 18:28:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 639. [2022-01-31 18:28:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 633 states have (on average 1.249605055292259) internal successors, (791), 633 states have internal predecessors, (791), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 796 transitions. [2022-01-31 18:28:06,031 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 796 transitions. Word has length 630 [2022-01-31 18:28:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:06,032 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 796 transitions. [2022-01-31 18:28:06,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.962025316455696) internal successors, (626), 157 states have internal predecessors, (626), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 796 transitions. [2022-01-31 18:28:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2022-01-31 18:28:06,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:06,035 INFO L514 BasicCegarLoop]: trace histogram [155, 155, 155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:06,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 18:28:06,035 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash 908871922, now seen corresponding path program 155 times [2022-01-31 18:28:06,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:06,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234770861] [2022-01-31 18:28:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:06,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:06,039 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:28:06,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:06,221 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:14,563 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234770861] [2022-01-31 18:28:14,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234770861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:14,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:14,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 18:28:14,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113622000] [2022-01-31 18:28:14,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:14,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 18:28:14,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 18:28:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:28:14,569 INFO L87 Difference]: Start difference. First operand 639 states and 796 transitions. Second operand has 159 states, 159 states have (on average 3.9622641509433962) internal successors, (630), 158 states have internal predecessors, (630), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:25,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:25,509 INFO L93 Difference]: Finished difference Result 1438 states and 1911 transitions. [2022-01-31 18:28:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 18:28:25,510 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 3.9622641509433962) internal successors, (630), 158 states have internal predecessors, (630), 2 states have call successors, (3), 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 634 [2022-01-31 18:28:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:25,512 INFO L225 Difference]: With dead ends: 1438 [2022-01-31 18:28:25,512 INFO L226 Difference]: Without dead ends: 1426 [2022-01-31 18:28:25,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12564, Invalid=12876, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 18:28:25,513 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 3174 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3330 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:25,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3330 Valid, 1077 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 18:28:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2022-01-31 18:28:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 643. [2022-01-31 18:28:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 637 states have (on average 1.249607535321821) internal successors, (796), 637 states have internal predecessors, (796), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 801 transitions. [2022-01-31 18:28:25,530 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 801 transitions. Word has length 634 [2022-01-31 18:28:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:25,530 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 801 transitions. [2022-01-31 18:28:25,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 3.9622641509433962) internal successors, (630), 158 states have internal predecessors, (630), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 801 transitions. [2022-01-31 18:28:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-01-31 18:28:25,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:25,533 INFO L514 BasicCegarLoop]: trace histogram [156, 156, 156, 156, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:25,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 18:28:25,533 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash 973987671, now seen corresponding path program 156 times [2022-01-31 18:28:25,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:25,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151717416] [2022-01-31 18:28:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:25,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:25,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:28:25,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:25,711 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat