/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:48:19,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:48:19,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:48:19,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:48:19,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:48:19,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:48:19,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:48:19,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:48:19,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:48:19,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:48:19,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:48:19,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:48:19,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:48:19,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:48:19,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:48:19,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:48:19,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:48:19,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:48:19,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:48:19,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:48:19,793 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 20:48:19,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:48:19,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:48:19,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:48:19,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:48:19,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:48:19,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:48:19,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:48:19,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:48:19,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:48:19,802 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:48:19,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:48:19,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:48:19,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:48:19,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:48:19,995 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:48:19,997 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:48:19,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-01-31 20:48:20,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540a81536/2d86bf4b498e41d59775a083afd5e99f/FLAG451a6effd [2022-01-31 20:48:20,372 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:48:20,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-01-31 20:48:20,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540a81536/2d86bf4b498e41d59775a083afd5e99f/FLAG451a6effd [2022-01-31 20:48:20,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/540a81536/2d86bf4b498e41d59775a083afd5e99f [2022-01-31 20:48:20,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:48:20,815 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:48:20,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:48:20,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:48:20,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:48:20,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:48:20" (1/1) ... [2022-01-31 20:48:20,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c7889a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:20, skipping insertion in model container [2022-01-31 20:48:20,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:48:20" (1/1) ... [2022-01-31 20:48:20,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:48:20,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:48:21,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-01-31 20:48:21,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:48:21,022 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:48:21,029 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-01-31 20:48:21,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:48:21,039 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:48:21,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21 WrapperNode [2022-01-31 20:48:21,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:48:21,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:48:21,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:48:21,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:48:21,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:48:21,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:48:21,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:48:21,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:48:21,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (1/1) ... [2022-01-31 20:48:21,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:48:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:48:21,084 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 20:48:21,089 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 20:48:21,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:48:21,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:48:21,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:48:21,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:48:21,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:48:21,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:48:21,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:48:21,167 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:48:21,168 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:48:21,244 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:48:21,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:48:21,248 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 20:48:21,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:21 BoogieIcfgContainer [2022-01-31 20:48:21,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:48:21,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:48:21,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:48:21,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:48:21,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:48:20" (1/3) ... [2022-01-31 20:48:21,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b76cd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:48:21, skipping insertion in model container [2022-01-31 20:48:21,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:48:21" (2/3) ... [2022-01-31 20:48:21,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b76cd9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:48:21, skipping insertion in model container [2022-01-31 20:48:21,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:48:21" (3/3) ... [2022-01-31 20:48:21,254 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2022-01-31 20:48:21,257 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:48:21,258 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:48:21,285 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:48:21,289 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 20:48:21,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:48:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 20:48:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 20:48:21,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:21,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:21,310 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2022-01-31 20:48:21,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:21,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568875431] [2022-01-31 20:48:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:21,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:21,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:21,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568875431] [2022-01-31 20:48:21,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568875431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:21,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:21,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:48:21,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787538027] [2022-01-31 20:48:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:21,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:48:21,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:48:21,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:48:21,465 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:21,511 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-31 20:48:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:48:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 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 13 [2022-01-31 20:48:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:21,517 INFO L225 Difference]: With dead ends: 42 [2022-01-31 20:48:21,517 INFO L226 Difference]: Without dead ends: 18 [2022-01-31 20:48:21,519 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 20:48:21,521 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:21,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:48:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-31 20:48:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-31 20:48:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-01-31 20:48:21,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-01-31 20:48:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:21,545 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-01-31 20:48:21,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-01-31 20:48:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 20:48:21,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:21,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:21,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:48:21,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2022-01-31 20:48:21,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578122903] [2022-01-31 20:48:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:21,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:21,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,591 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 20:48:21,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578122903] [2022-01-31 20:48:21,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [578122903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:21,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:21,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:48:21,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733025355] [2022-01-31 20:48:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:21,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:48:21,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:48:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:48:21,594 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:21,655 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-31 20:48:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:48:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 20:48:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:21,658 INFO L225 Difference]: With dead ends: 35 [2022-01-31 20:48:21,658 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 20:48:21,658 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 20:48:21,659 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:21,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:48:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 20:48:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-01-31 20:48:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 20:48:21,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-01-31 20:48:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 20:48:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 20:48:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:48:21,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:21,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:21,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:48:21,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:21,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2022-01-31 20:48:21,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:21,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776575293] [2022-01-31 20:48:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:21,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:21,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:21,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:21,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,785 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 20:48:21,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776575293] [2022-01-31 20:48:21,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776575293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:21,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:21,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:48:21,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102661795] [2022-01-31 20:48:21,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:21,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:48:21,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:48:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:48:21,787 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:21,859 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-01-31 20:48:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:48:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2022-01-31 20:48:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:21,860 INFO L225 Difference]: With dead ends: 42 [2022-01-31 20:48:21,860 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 20:48:21,861 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 20:48:21,862 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:21,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:48:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 20:48:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2022-01-31 20:48:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 20:48:21,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-01-31 20:48:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:21,868 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 20:48:21,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 20:48:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 20:48:21,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:21,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:21,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:48:21,869 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:21,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:21,870 INFO L85 PathProgramCache]: Analyzing trace with hash -890617981, now seen corresponding path program 2 times [2022-01-31 20:48:21,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:21,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834961747] [2022-01-31 20:48:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:21,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:21,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:21,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:21,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:21,955 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 20:48:21,956 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834961747] [2022-01-31 20:48:21,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [834961747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:21,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:21,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:48:21,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107329840] [2022-01-31 20:48:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:21,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:48:21,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:48:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:48:21,958 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:22,028 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 20:48:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:48:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 20:48:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:22,030 INFO L225 Difference]: With dead ends: 30 [2022-01-31 20:48:22,030 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 20:48:22,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:48:22,039 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:22,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:48:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 20:48:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 20:48:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 20:48:22,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-01-31 20:48:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:22,047 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 20:48:22,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 20:48:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 20:48:22,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:22,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:22,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:48:22,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:22,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 1 times [2022-01-31 20:48:22,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:22,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49061417] [2022-01-31 20:48:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:22,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:22,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:22,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:22,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,107 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 20:48:22,107 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:22,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49061417] [2022-01-31 20:48:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [49061417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:22,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:22,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:48:22,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21107575] [2022-01-31 20:48:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:48:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:48:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:48:22,109 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:22,189 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 20:48:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:48:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 20:48:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:22,193 INFO L225 Difference]: With dead ends: 35 [2022-01-31 20:48:22,193 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 20:48:22,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:48:22,202 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:22,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:48:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 20:48:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 20:48:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 20:48:22,212 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-01-31 20:48:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:22,212 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 20:48:22,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 20:48:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 20:48:22,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:22,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:48:22,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 2 times [2022-01-31 20:48:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474310040] [2022-01-31 20:48:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:22,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:22,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:22,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:22,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:22,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474310040] [2022-01-31 20:48:22,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474310040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:22,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:22,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:48:22,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621044114] [2022-01-31 20:48:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:22,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:48:22,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:48:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:48:22,262 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:22,317 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-01-31 20:48:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:48:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 20:48:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:22,318 INFO L225 Difference]: With dead ends: 54 [2022-01-31 20:48:22,318 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 20:48:22,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:48:22,319 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:22,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:48:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 20:48:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-31 20:48:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 20:48:22,329 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2022-01-31 20:48:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:22,329 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 20:48:22,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 20:48:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:48:22,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:22,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:22,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:48:22,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 3 times [2022-01-31 20:48:22,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:22,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158429414] [2022-01-31 20:48:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:22,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:22,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:22,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:22,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,404 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 20:48:22,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158429414] [2022-01-31 20:48:22,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158429414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:22,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:22,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:48:22,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389018157] [2022-01-31 20:48:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:22,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:48:22,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:48:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:48:22,406 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:22,506 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-01-31 20:48:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:48:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:48:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:22,508 INFO L225 Difference]: With dead ends: 61 [2022-01-31 20:48:22,508 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 20:48:22,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:48:22,509 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:22,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 20:48:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-01-31 20:48:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 20:48:22,519 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-01-31 20:48:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:22,519 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 20:48:22,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 20:48:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 20:48:22,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:22,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:22,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:48:22,520 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 4 times [2022-01-31 20:48:22,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:22,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497857338] [2022-01-31 20:48:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:22,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:22,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:22,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:22,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,588 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 20:48:22,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:22,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497857338] [2022-01-31 20:48:22,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497857338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:22,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:22,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:48:22,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932622405] [2022-01-31 20:48:22,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:22,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:48:22,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:48:22,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:48:22,590 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:22,703 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-01-31 20:48:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:48:22,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 20:48:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:22,704 INFO L225 Difference]: With dead ends: 68 [2022-01-31 20:48:22,704 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 20:48:22,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:48:22,705 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:22,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 22 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 20:48:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-01-31 20:48:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-01-31 20:48:22,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2022-01-31 20:48:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:22,711 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-01-31 20:48:22,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-01-31 20:48:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 20:48:22,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:22,712 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:22,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:48:22,712 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 5 times [2022-01-31 20:48:22,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:22,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000274689] [2022-01-31 20:48:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:22,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:22,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:22,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:22,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,765 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 20:48:22,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:22,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000274689] [2022-01-31 20:48:22,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000274689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:22,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:22,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:48:22,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817520627] [2022-01-31 20:48:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:22,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:48:22,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:48:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:48:22,766 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:22,884 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-01-31 20:48:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:48:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 20:48:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:22,885 INFO L225 Difference]: With dead ends: 75 [2022-01-31 20:48:22,885 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 20:48:22,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:48:22,886 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:22,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 32 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 20:48:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2022-01-31 20:48:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 20:48:22,892 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2022-01-31 20:48:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:22,893 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 20:48:22,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 20:48:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:48:22,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:22,893 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:22,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:48:22,894 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 6 times [2022-01-31 20:48:22,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:22,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502438634] [2022-01-31 20:48:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:22,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:22,896 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:22,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:22,897 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:22,958 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 20:48:22,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:22,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502438634] [2022-01-31 20:48:22,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [502438634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:22,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:22,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:48:22,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186748548] [2022-01-31 20:48:22,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:48:22,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:22,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:48:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:48:22,960 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:23,085 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-01-31 20:48:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:48:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 20:48:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:23,086 INFO L225 Difference]: With dead ends: 82 [2022-01-31 20:48:23,086 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 20:48:23,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:48:23,087 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:23,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 20:48:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-01-31 20:48:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-31 20:48:23,094 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2022-01-31 20:48:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:23,094 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-31 20:48:23,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-31 20:48:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 20:48:23,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:23,095 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:23,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:48:23,095 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 7 times [2022-01-31 20:48:23,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:23,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621358847] [2022-01-31 20:48:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:23,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:23,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:23,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:23,098 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,163 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 20:48:23,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621358847] [2022-01-31 20:48:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [621358847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:23,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:23,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:48:23,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909253568] [2022-01-31 20:48:23,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:23,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:48:23,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:48:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:48:23,165 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:23,302 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-01-31 20:48:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:48:23,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 20:48:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:23,303 INFO L225 Difference]: With dead ends: 89 [2022-01-31 20:48:23,303 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 20:48:23,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:48:23,304 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:23,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 32 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 20:48:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-01-31 20:48:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-01-31 20:48:23,310 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2022-01-31 20:48:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:23,310 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-01-31 20:48:23,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-01-31 20:48:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:48:23,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:23,311 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:23,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:48:23,311 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 8 times [2022-01-31 20:48:23,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:23,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97947049] [2022-01-31 20:48:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:23,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:23,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:23,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:23,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,377 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 20:48:23,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97947049] [2022-01-31 20:48:23,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [97947049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:23,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:23,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:48:23,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063791410] [2022-01-31 20:48:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:23,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:48:23,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:48:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:48:23,379 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:23,543 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-01-31 20:48:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:48:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 20:48:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:23,544 INFO L225 Difference]: With dead ends: 96 [2022-01-31 20:48:23,544 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 20:48:23,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:48:23,545 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 142 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:23,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 42 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 20:48:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-01-31 20:48:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-31 20:48:23,551 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2022-01-31 20:48:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:23,551 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-31 20:48:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-31 20:48:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:48:23,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:23,552 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:23,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:48:23,552 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 9 times [2022-01-31 20:48:23,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:23,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857336917] [2022-01-31 20:48:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:23,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:23,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:23,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:23,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,633 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 20:48:23,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:23,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857336917] [2022-01-31 20:48:23,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857336917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:23,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:23,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:48:23,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122764910] [2022-01-31 20:48:23,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:23,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:48:23,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:48:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:48:23,634 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:23,811 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-01-31 20:48:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:48:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 20:48:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:23,812 INFO L225 Difference]: With dead ends: 103 [2022-01-31 20:48:23,812 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 20:48:23,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:48:23,813 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:23,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 37 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 20:48:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2022-01-31 20:48:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-01-31 20:48:23,855 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2022-01-31 20:48:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:23,855 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-01-31 20:48:23,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-01-31 20:48:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 20:48:23,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:23,859 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:23,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:48:23,859 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:23,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 10 times [2022-01-31 20:48:23,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:23,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313443902] [2022-01-31 20:48:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:23,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:23,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:23,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:23,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:23,957 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 20:48:23,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313443902] [2022-01-31 20:48:23,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313443902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:23,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:23,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:48:23,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277701539] [2022-01-31 20:48:23,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:23,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:48:23,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:48:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:48:23,958 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:24,161 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2022-01-31 20:48:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:48:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 20:48:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:24,162 INFO L225 Difference]: With dead ends: 110 [2022-01-31 20:48:24,162 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 20:48:24,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:48:24,163 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 214 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:24,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 27 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 20:48:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-01-31 20:48:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-01-31 20:48:24,170 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2022-01-31 20:48:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:24,170 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-01-31 20:48:24,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-01-31 20:48:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 20:48:24,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:24,171 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:24,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:48:24,171 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 11 times [2022-01-31 20:48:24,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:24,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075797333] [2022-01-31 20:48:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:24,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:24,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:24,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:24,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:24,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075797333] [2022-01-31 20:48:24,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075797333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:24,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:24,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:48:24,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036446620] [2022-01-31 20:48:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:24,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:48:24,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:48:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:48:24,265 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:24,516 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-01-31 20:48:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:48:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 20:48:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:24,517 INFO L225 Difference]: With dead ends: 117 [2022-01-31 20:48:24,517 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 20:48:24,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:48:24,518 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 265 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:24,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 32 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 20:48:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-01-31 20:48:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-01-31 20:48:24,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2022-01-31 20:48:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-01-31 20:48:24,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-01-31 20:48:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 20:48:24,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:24,526 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:24,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:48:24,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 12 times [2022-01-31 20:48:24,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:24,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742567202] [2022-01-31 20:48:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:24,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:24,528 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:24,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:24,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:24,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:24,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742567202] [2022-01-31 20:48:24,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742567202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:24,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:24,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:48:24,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138776198] [2022-01-31 20:48:24,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:24,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:48:24,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:48:24,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:48:24,657 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:24,935 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-01-31 20:48:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:48:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 20:48:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:24,936 INFO L225 Difference]: With dead ends: 124 [2022-01-31 20:48:24,936 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 20:48:24,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:48:24,936 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 232 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:24,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 32 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 20:48:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 50. [2022-01-31 20:48:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-31 20:48:24,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 47 [2022-01-31 20:48:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:24,944 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-31 20:48:24,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-31 20:48:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 20:48:24,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:24,945 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:24,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:48:24,945 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 13 times [2022-01-31 20:48:24,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:24,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713240888] [2022-01-31 20:48:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:24,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:24,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:24,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:24,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:25,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:25,055 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 20:48:25,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:25,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713240888] [2022-01-31 20:48:25,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713240888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:25,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:25,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:48:25,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889165315] [2022-01-31 20:48:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:25,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:48:25,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:48:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:48:25,057 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:25,334 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-01-31 20:48:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:48:25,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 20:48:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:25,335 INFO L225 Difference]: With dead ends: 131 [2022-01-31 20:48:25,335 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 20:48:25,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:48:25,336 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:25,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 37 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 20:48:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2022-01-31 20:48:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-01-31 20:48:25,343 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2022-01-31 20:48:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:25,343 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-01-31 20:48:25,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-01-31 20:48:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:48:25,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:25,344 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:25,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:48:25,344 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 14 times [2022-01-31 20:48:25,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986111652] [2022-01-31 20:48:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:25,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:25,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:25,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:25,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:25,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:25,510 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 20:48:25,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986111652] [2022-01-31 20:48:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986111652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:25,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:25,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:48:25,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806114206] [2022-01-31 20:48:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:25,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:48:25,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:48:25,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:48:25,512 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:25,833 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-01-31 20:48:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:48:25,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 20:48:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:25,834 INFO L225 Difference]: With dead ends: 138 [2022-01-31 20:48:25,834 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 20:48:25,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:48:25,835 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 257 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:25,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 37 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 20:48:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2022-01-31 20:48:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-01-31 20:48:25,844 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2022-01-31 20:48:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-01-31 20:48:25,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-01-31 20:48:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 20:48:25,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:25,845 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:25,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:48:25,845 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:25,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 15 times [2022-01-31 20:48:25,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:25,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382425669] [2022-01-31 20:48:25,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:25,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:25,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:25,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:25,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:25,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:25,987 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 20:48:25,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382425669] [2022-01-31 20:48:25,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382425669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:25,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:25,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:48:25,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007151655] [2022-01-31 20:48:25,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:25,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:48:25,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:48:25,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:48:25,988 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:26,320 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2022-01-31 20:48:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:48:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 20:48:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:26,321 INFO L225 Difference]: With dead ends: 145 [2022-01-31 20:48:26,321 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 20:48:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:48:26,322 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 261 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:26,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 52 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:48:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 20:48:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 56. [2022-01-31 20:48:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-01-31 20:48:26,330 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2022-01-31 20:48:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-01-31 20:48:26,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-01-31 20:48:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:48:26,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:26,331 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:26,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:48:26,331 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 16 times [2022-01-31 20:48:26,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095926029] [2022-01-31 20:48:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:26,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:26,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:26,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:26,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:26,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:26,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095926029] [2022-01-31 20:48:26,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095926029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:26,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:26,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:48:26,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469491044] [2022-01-31 20:48:26,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:26,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:48:26,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:48:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:48:26,502 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:26,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:26,921 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-01-31 20:48:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:48:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 20:48:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:26,922 INFO L225 Difference]: With dead ends: 152 [2022-01-31 20:48:26,922 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 20:48:26,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:48:26,923 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 342 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:26,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 32 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 20:48:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 58. [2022-01-31 20:48:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-01-31 20:48:26,936 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 55 [2022-01-31 20:48:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:26,936 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-01-31 20:48:26,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-01-31 20:48:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:48:26,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:26,936 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:26,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:48:26,937 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 17 times [2022-01-31 20:48:26,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:26,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585881922] [2022-01-31 20:48:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:26,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:26,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:26,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:26,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:27,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:27,110 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 20:48:27,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:27,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585881922] [2022-01-31 20:48:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585881922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:27,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:27,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:48:27,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560355336] [2022-01-31 20:48:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:27,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:48:27,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:48:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:48:27,111 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:27,562 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-01-31 20:48:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:48:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 20:48:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:27,563 INFO L225 Difference]: With dead ends: 159 [2022-01-31 20:48:27,563 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 20:48:27,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:48:27,564 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 335 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:27,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 52 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 20:48:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2022-01-31 20:48:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-01-31 20:48:27,593 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2022-01-31 20:48:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-01-31 20:48:27,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-01-31 20:48:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:48:27,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:27,595 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:27,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:48:27,595 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 18 times [2022-01-31 20:48:27,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:27,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539515216] [2022-01-31 20:48:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:27,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:27,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:27,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:27,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:27,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:27,778 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 20:48:27,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:27,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539515216] [2022-01-31 20:48:27,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [539515216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:27,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:27,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:48:27,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721562726] [2022-01-31 20:48:27,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:27,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:48:27,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:27,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:48:27,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:48:27,779 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:28,211 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-01-31 20:48:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:48:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 20:48:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:28,214 INFO L225 Difference]: With dead ends: 166 [2022-01-31 20:48:28,214 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 20:48:28,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:48:28,215 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 354 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 37 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 20:48:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 62. [2022-01-31 20:48:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-01-31 20:48:28,227 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2022-01-31 20:48:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:28,227 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-01-31 20:48:28,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-01-31 20:48:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:48:28,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:28,228 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:28,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:48:28,228 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 19 times [2022-01-31 20:48:28,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:28,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095871645] [2022-01-31 20:48:28,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:28,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:28,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:28,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:28,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:28,431 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 20:48:28,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:28,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095871645] [2022-01-31 20:48:28,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095871645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:28,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:28,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:48:28,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628292752] [2022-01-31 20:48:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:28,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:48:28,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:48:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:48:28,433 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:28,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:28,923 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2022-01-31 20:48:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:48:28,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 20:48:28,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:28,924 INFO L225 Difference]: With dead ends: 173 [2022-01-31 20:48:28,924 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 20:48:28,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:48:28,925 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 392 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:28,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 32 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 20:48:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 64. [2022-01-31 20:48:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-01-31 20:48:28,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2022-01-31 20:48:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:28,936 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-01-31 20:48:28,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-01-31 20:48:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 20:48:28,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:28,937 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:28,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:48:28,937 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 20 times [2022-01-31 20:48:28,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:28,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858414536] [2022-01-31 20:48:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:28,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:28,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:28,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:28,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:29,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:29,132 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 20:48:29,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858414536] [2022-01-31 20:48:29,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858414536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:29,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:29,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:48:29,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904290422] [2022-01-31 20:48:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:29,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:48:29,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:48:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:48:29,133 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:29,674 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2022-01-31 20:48:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:48:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 20:48:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:29,678 INFO L225 Difference]: With dead ends: 180 [2022-01-31 20:48:29,678 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 20:48:29,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:48:29,679 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 402 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:29,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 37 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 20:48:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 66. [2022-01-31 20:48:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-31 20:48:29,691 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2022-01-31 20:48:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:29,691 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-31 20:48:29,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-31 20:48:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 20:48:29,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:29,692 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:29,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:48:29,692 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 21 times [2022-01-31 20:48:29,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:29,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506289232] [2022-01-31 20:48:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:29,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:29,694 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:29,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:29,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:29,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:29,891 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 20:48:29,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506289232] [2022-01-31 20:48:29,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506289232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:29,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:29,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:48:29,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611048997] [2022-01-31 20:48:29,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:29,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:48:29,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:48:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:48:29,892 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:30,481 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2022-01-31 20:48:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:48:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 20:48:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:30,482 INFO L225 Difference]: With dead ends: 187 [2022-01-31 20:48:30,482 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 20:48:30,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:48:30,483 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 534 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:30,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 27 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 20:48:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 68. [2022-01-31 20:48:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-01-31 20:48:30,496 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2022-01-31 20:48:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:30,496 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-01-31 20:48:30,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-01-31 20:48:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 20:48:30,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:30,497 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:48:30,497 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 22 times [2022-01-31 20:48:30,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:30,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279314704] [2022-01-31 20:48:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:30,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:30,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:30,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:30,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:30,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:30,732 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 20:48:30,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:30,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279314704] [2022-01-31 20:48:30,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279314704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:30,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:30,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:48:30,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296240788] [2022-01-31 20:48:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:30,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:48:30,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:48:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:48:30,735 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:31,356 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2022-01-31 20:48:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:48:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 20:48:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:31,357 INFO L225 Difference]: With dead ends: 194 [2022-01-31 20:48:31,358 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 20:48:31,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:48:31,358 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 534 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:31,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 27 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 20:48:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 70. [2022-01-31 20:48:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-01-31 20:48:31,372 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2022-01-31 20:48:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:31,373 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-01-31 20:48:31,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-01-31 20:48:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 20:48:31,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:31,373 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:31,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:48:31,373 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 23 times [2022-01-31 20:48:31,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:31,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372100076] [2022-01-31 20:48:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:31,375 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:31,375 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:31,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:31,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:31,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:31,614 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 20:48:31,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:31,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372100076] [2022-01-31 20:48:31,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372100076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:31,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:31,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 20:48:31,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348826873] [2022-01-31 20:48:31,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:31,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 20:48:31,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:31,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 20:48:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:48:31,616 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:32,297 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2022-01-31 20:48:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:48:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 20:48:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:32,298 INFO L225 Difference]: With dead ends: 201 [2022-01-31 20:48:32,298 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 20:48:32,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:48:32,299 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 469 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:32,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 42 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 20:48:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 72. [2022-01-31 20:48:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-01-31 20:48:32,314 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2022-01-31 20:48:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:32,314 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-01-31 20:48:32,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-01-31 20:48:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 20:48:32,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:32,315 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:32,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:48:32,315 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 24 times [2022-01-31 20:48:32,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:32,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965375899] [2022-01-31 20:48:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:32,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:32,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:32,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:32,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:32,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:32,593 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 20:48:32,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:32,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965375899] [2022-01-31 20:48:32,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965375899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:32,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:32,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 20:48:32,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174936045] [2022-01-31 20:48:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:32,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 20:48:32,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 20:48:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:48:32,595 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:33,333 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2022-01-31 20:48:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 20:48:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 20:48:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:33,360 INFO L225 Difference]: With dead ends: 208 [2022-01-31 20:48:33,360 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 20:48:33,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:48:33,361 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 445 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:33,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 52 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 20:48:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 74. [2022-01-31 20:48:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-01-31 20:48:33,378 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2022-01-31 20:48:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:33,378 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-01-31 20:48:33,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-01-31 20:48:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 20:48:33,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:33,378 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:33,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:48:33,379 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 25 times [2022-01-31 20:48:33,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:33,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499767573] [2022-01-31 20:48:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:33,381 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:33,381 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:33,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:33,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:33,656 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 20:48:33,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499767573] [2022-01-31 20:48:33,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499767573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:33,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:33,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 20:48:33,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048735283] [2022-01-31 20:48:33,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:33,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 20:48:33,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:33,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 20:48:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:48:33,657 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:34,475 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2022-01-31 20:48:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 20:48:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 20:48:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:34,476 INFO L225 Difference]: With dead ends: 215 [2022-01-31 20:48:34,476 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 20:48:34,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:48:34,477 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 556 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:34,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 37 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 20:48:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 76. [2022-01-31 20:48:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-01-31 20:48:34,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2022-01-31 20:48:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:34,495 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-01-31 20:48:34,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-01-31 20:48:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:48:34,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:34,496 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:34,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:48:34,496 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 26 times [2022-01-31 20:48:34,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:34,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987671365] [2022-01-31 20:48:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:34,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:34,498 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:34,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:34,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:34,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:34,788 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 20:48:34,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:34,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987671365] [2022-01-31 20:48:34,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987671365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:34,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:34,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 20:48:34,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001554265] [2022-01-31 20:48:34,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:34,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 20:48:34,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 20:48:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:48:34,789 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:35,596 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2022-01-31 20:48:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 20:48:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 20:48:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:35,597 INFO L225 Difference]: With dead ends: 222 [2022-01-31 20:48:35,597 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 20:48:35,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:48:35,598 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 597 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:35,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 32 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 20:48:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 78. [2022-01-31 20:48:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-01-31 20:48:35,616 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2022-01-31 20:48:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:35,617 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-01-31 20:48:35,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-01-31 20:48:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 20:48:35,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:35,617 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:35,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:48:35,617 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 27 times [2022-01-31 20:48:35,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:35,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605202044] [2022-01-31 20:48:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:35,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:35,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:35,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:35,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:35,929 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 20:48:35,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605202044] [2022-01-31 20:48:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1605202044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:35,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 20:48:35,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284572589] [2022-01-31 20:48:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:35,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 20:48:35,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 20:48:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:48:35,930 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:36,799 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2022-01-31 20:48:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 20:48:36,799 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 20:48:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:36,800 INFO L225 Difference]: With dead ends: 229 [2022-01-31 20:48:36,800 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 20:48:36,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:48:36,801 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 558 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:36,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 37 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 20:48:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 80. [2022-01-31 20:48:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-01-31 20:48:36,826 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2022-01-31 20:48:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:36,826 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-01-31 20:48:36,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-01-31 20:48:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 20:48:36,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:36,827 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:48:36,827 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 28 times [2022-01-31 20:48:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249617756] [2022-01-31 20:48:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:36,830 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:36,830 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:36,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:36,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:37,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:37,148 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 20:48:37,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:37,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249617756] [2022-01-31 20:48:37,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [249617756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:37,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:37,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 20:48:37,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397561705] [2022-01-31 20:48:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:37,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 20:48:37,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 20:48:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:48:37,150 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:38,135 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2022-01-31 20:48:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:48:38,135 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 20:48:38,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:38,136 INFO L225 Difference]: With dead ends: 236 [2022-01-31 20:48:38,136 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 20:48:38,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:48:38,137 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 698 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:38,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 37 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 20:48:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 82. [2022-01-31 20:48:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-01-31 20:48:38,157 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2022-01-31 20:48:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-01-31 20:48:38,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-01-31 20:48:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 20:48:38,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:38,158 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:38,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:48:38,158 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 29 times [2022-01-31 20:48:38,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501136743] [2022-01-31 20:48:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:38,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:38,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:38,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:38,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:38,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:38,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:38,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501136743] [2022-01-31 20:48:38,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501136743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:38,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:38,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:48:38,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497470817] [2022-01-31 20:48:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:38,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:48:38,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:48:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:48:38,501 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:39,473 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2022-01-31 20:48:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 20:48:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 20:48:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:39,474 INFO L225 Difference]: With dead ends: 243 [2022-01-31 20:48:39,474 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 20:48:39,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:48:39,475 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 800 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:39,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 22 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 20:48:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 84. [2022-01-31 20:48:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-01-31 20:48:39,496 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2022-01-31 20:48:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:39,496 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-01-31 20:48:39,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-01-31 20:48:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 20:48:39,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:39,497 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:39,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:48:39,497 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 30 times [2022-01-31 20:48:39,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:39,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437337838] [2022-01-31 20:48:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:39,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:39,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:39,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:39,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:39,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:39,835 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 20:48:39,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437337838] [2022-01-31 20:48:39,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437337838] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:39,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:39,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 20:48:39,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786918464] [2022-01-31 20:48:39,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:39,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 20:48:39,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 20:48:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:48:39,837 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:40,855 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2022-01-31 20:48:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 20:48:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 20:48:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:40,857 INFO L225 Difference]: With dead ends: 250 [2022-01-31 20:48:40,857 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 20:48:40,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:48:40,858 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 657 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:40,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 37 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:48:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 20:48:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2022-01-31 20:48:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-01-31 20:48:40,884 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2022-01-31 20:48:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:40,884 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-01-31 20:48:40,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:40,884 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-01-31 20:48:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 20:48:40,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:40,885 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:40,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:48:40,885 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 31 times [2022-01-31 20:48:40,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:40,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741297567] [2022-01-31 20:48:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:40,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:40,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:40,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:40,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:41,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:41,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741297567] [2022-01-31 20:48:41,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741297567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:41,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:41,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 20:48:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4952163] [2022-01-31 20:48:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:41,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 20:48:41,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 20:48:41,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:48:41,250 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:42,395 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-01-31 20:48:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:48:42,396 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 20:48:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:42,397 INFO L225 Difference]: With dead ends: 257 [2022-01-31 20:48:42,397 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 20:48:42,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:48:42,397 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 676 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:42,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 37 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 20:48:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 88. [2022-01-31 20:48:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-01-31 20:48:42,422 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2022-01-31 20:48:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:42,423 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-01-31 20:48:42,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-01-31 20:48:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 20:48:42,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:42,423 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:42,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:48:42,423 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 32 times [2022-01-31 20:48:42,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:42,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747628496] [2022-01-31 20:48:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:42,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:42,425 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:42,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:42,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:42,825 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 20:48:42,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:42,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747628496] [2022-01-31 20:48:42,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747628496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:42,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:42,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:48:42,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185768133] [2022-01-31 20:48:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:42,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:48:42,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:48:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:48:42,827 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:44,042 INFO L93 Difference]: Finished difference Result 264 states and 334 transitions. [2022-01-31 20:48:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 20:48:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 20:48:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:44,043 INFO L225 Difference]: With dead ends: 264 [2022-01-31 20:48:44,043 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 20:48:44,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:48:44,044 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 688 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:44,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 42 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 20:48:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 90. [2022-01-31 20:48:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-01-31 20:48:44,074 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2022-01-31 20:48:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:44,074 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-01-31 20:48:44,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-01-31 20:48:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 20:48:44,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:44,074 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:44,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:48:44,075 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 33 times [2022-01-31 20:48:44,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:44,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905950716] [2022-01-31 20:48:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:44,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:44,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:44,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:44,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:44,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:44,491 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 20:48:44,491 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:44,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905950716] [2022-01-31 20:48:44,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905950716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:44,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:44,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:48:44,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573577954] [2022-01-31 20:48:44,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:44,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:48:44,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:48:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:48:44,493 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:45,814 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2022-01-31 20:48:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 20:48:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 20:48:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:45,815 INFO L225 Difference]: With dead ends: 271 [2022-01-31 20:48:45,815 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 20:48:45,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:48:45,816 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 751 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:45,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 42 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 20:48:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 92. [2022-01-31 20:48:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-01-31 20:48:45,844 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2022-01-31 20:48:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:45,844 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-01-31 20:48:45,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-01-31 20:48:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 20:48:45,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:45,844 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:45,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:48:45,845 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 34 times [2022-01-31 20:48:45,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:45,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104857086] [2022-01-31 20:48:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:45,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:45,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:45,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:45,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:46,266 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 20:48:46,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104857086] [2022-01-31 20:48:46,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104857086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:46,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:46,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:48:46,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091920036] [2022-01-31 20:48:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:48:46,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:48:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:48:46,267 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:47,726 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-01-31 20:48:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:48:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 20:48:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:47,727 INFO L225 Difference]: With dead ends: 278 [2022-01-31 20:48:47,727 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 20:48:47,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:48:47,728 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 814 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:47,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 37 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:48:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 20:48:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 94. [2022-01-31 20:48:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-01-31 20:48:47,757 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2022-01-31 20:48:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:47,757 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-01-31 20:48:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-01-31 20:48:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:48:47,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:47,758 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:47,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:48:47,758 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 35 times [2022-01-31 20:48:47,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:47,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645645399] [2022-01-31 20:48:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:47,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:47,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:47,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:47,761 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:48,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:48,226 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 20:48:48,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645645399] [2022-01-31 20:48:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645645399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:48,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:48,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:48:48,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809771118] [2022-01-31 20:48:48,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:48,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:48:48,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:48:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:48:48,227 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:49,823 INFO L93 Difference]: Finished difference Result 285 states and 361 transitions. [2022-01-31 20:48:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 20:48:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 20:48:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:49,824 INFO L225 Difference]: With dead ends: 285 [2022-01-31 20:48:49,824 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 20:48:49,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:48:49,825 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 845 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:49,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 32 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:48:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 20:48:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 96. [2022-01-31 20:48:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-01-31 20:48:49,856 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2022-01-31 20:48:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:49,857 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-01-31 20:48:49,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-01-31 20:48:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:48:49,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:49,857 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:49,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:48:49,858 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 36 times [2022-01-31 20:48:49,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:49,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869562075] [2022-01-31 20:48:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:49,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:49,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:49,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:49,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:50,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:50,390 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 20:48:50,390 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869562075] [2022-01-31 20:48:50,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [869562075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:50,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:50,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:48:50,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247265771] [2022-01-31 20:48:50,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:50,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:48:50,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:48:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:48:50,392 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:51,987 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2022-01-31 20:48:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 20:48:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 20:48:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:51,990 INFO L225 Difference]: With dead ends: 292 [2022-01-31 20:48:51,990 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 20:48:51,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:48:51,991 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 720 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:51,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 42 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 20:48:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 98. [2022-01-31 20:48:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-01-31 20:48:52,024 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2022-01-31 20:48:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:52,024 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-01-31 20:48:52,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-01-31 20:48:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 20:48:52,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:52,025 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:48:52,025 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 37 times [2022-01-31 20:48:52,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:52,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741216605] [2022-01-31 20:48:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:52,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:52,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:52,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:52,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:52,509 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 20:48:52,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:52,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741216605] [2022-01-31 20:48:52,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [741216605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:52,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:52,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:48:52,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994245136] [2022-01-31 20:48:52,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:52,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:48:52,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:48:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:48:52,510 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:54,231 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2022-01-31 20:48:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 20:48:54,231 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 20:48:54,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:54,232 INFO L225 Difference]: With dead ends: 299 [2022-01-31 20:48:54,232 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 20:48:54,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:48:54,233 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 840 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:54,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 37 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 20:48:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 100. [2022-01-31 20:48:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-01-31 20:48:54,268 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 97 [2022-01-31 20:48:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:54,268 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-01-31 20:48:54,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-01-31 20:48:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 20:48:54,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:54,269 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:54,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:48:54,269 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 38 times [2022-01-31 20:48:54,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:54,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514252313] [2022-01-31 20:48:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:54,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:54,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:54,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:54,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:54,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:54,785 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 20:48:54,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:54,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514252313] [2022-01-31 20:48:54,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514252313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:54,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:54,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:48:54,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748343287] [2022-01-31 20:48:54,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:54,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:48:54,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:48:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:48:54,787 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:56,576 INFO L93 Difference]: Finished difference Result 306 states and 388 transitions. [2022-01-31 20:48:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 20:48:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 20:48:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:56,578 INFO L225 Difference]: With dead ends: 306 [2022-01-31 20:48:56,578 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 20:48:56,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:48:56,579 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 935 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:56,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 47 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 20:48:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 102. [2022-01-31 20:48:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-01-31 20:48:56,624 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2022-01-31 20:48:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:56,624 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-01-31 20:48:56,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-01-31 20:48:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 20:48:56,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:56,624 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:56,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:48:56,625 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 39 times [2022-01-31 20:48:56,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:56,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502468552] [2022-01-31 20:48:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:56,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:56,627 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:56,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:56,628 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:57,191 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 20:48:57,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502468552] [2022-01-31 20:48:57,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [502468552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:57,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:57,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:48:57,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803897081] [2022-01-31 20:48:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:57,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:48:57,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:48:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:48:57,192 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:59,079 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-01-31 20:48:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 20:48:59,080 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 20:48:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:59,081 INFO L225 Difference]: With dead ends: 313 [2022-01-31 20:48:59,081 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 20:48:59,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:48:59,088 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 876 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:59,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 37 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:48:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 20:48:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 104. [2022-01-31 20:48:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-01-31 20:48:59,127 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2022-01-31 20:48:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:59,129 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-01-31 20:48:59,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-01-31 20:48:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 20:48:59,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:59,129 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:48:59,130 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 40 times [2022-01-31 20:48:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:59,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716346131] [2022-01-31 20:48:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:59,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:59,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:59,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:59,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:59,700 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 20:48:59,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716346131] [2022-01-31 20:48:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716346131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:59,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:48:59,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995700715] [2022-01-31 20:48:59,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:59,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:48:59,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:48:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:48:59,702 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:01,698 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2022-01-31 20:49:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 20:49:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 20:49:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:01,700 INFO L225 Difference]: With dead ends: 320 [2022-01-31 20:49:01,700 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 20:49:01,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 20:49:01,701 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 914 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:01,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 37 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 20:49:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 106. [2022-01-31 20:49:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-01-31 20:49:01,742 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2022-01-31 20:49:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:01,742 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-01-31 20:49:01,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-01-31 20:49:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 20:49:01,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:01,743 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:01,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:49:01,743 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 41 times [2022-01-31 20:49:01,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:01,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318815775] [2022-01-31 20:49:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:01,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:01,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:01,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:01,747 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:02,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:02,359 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 20:49:02,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:02,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318815775] [2022-01-31 20:49:02,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318815775] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:02,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:49:02,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309097172] [2022-01-31 20:49:02,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:02,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:49:02,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:49:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:49:02,360 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:04,529 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2022-01-31 20:49:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 20:49:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 20:49:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:04,530 INFO L225 Difference]: With dead ends: 327 [2022-01-31 20:49:04,530 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 20:49:04,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:49:04,531 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 778 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:04,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 67 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 20:49:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 108. [2022-01-31 20:49:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-01-31 20:49:04,574 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2022-01-31 20:49:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:04,574 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-01-31 20:49:04,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-01-31 20:49:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 20:49:04,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:04,574 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:04,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:49:04,575 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 42 times [2022-01-31 20:49:04,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:04,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6635278] [2022-01-31 20:49:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:04,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:04,577 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:04,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:04,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:05,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:05,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:05,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6635278] [2022-01-31 20:49:05,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [6635278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:05,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:05,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:49:05,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639967525] [2022-01-31 20:49:05,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:05,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:49:05,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:49:05,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:49:05,184 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:07,460 INFO L93 Difference]: Finished difference Result 334 states and 424 transitions. [2022-01-31 20:49:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:49:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 20:49:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:07,461 INFO L225 Difference]: With dead ends: 334 [2022-01-31 20:49:07,461 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 20:49:07,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:49:07,462 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1064 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:07,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 27 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 20:49:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 110. [2022-01-31 20:49:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-01-31 20:49:07,508 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2022-01-31 20:49:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:07,508 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-01-31 20:49:07,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-01-31 20:49:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 20:49:07,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:07,509 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:07,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:49:07,509 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 43 times [2022-01-31 20:49:07,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424941407] [2022-01-31 20:49:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:07,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:07,511 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:07,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:07,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:08,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:08,149 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 20:49:08,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:08,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424941407] [2022-01-31 20:49:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [424941407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:08,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:08,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:49:08,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543876699] [2022-01-31 20:49:08,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:08,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:49:08,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:49:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:49:08,150 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:10,565 INFO L93 Difference]: Finished difference Result 341 states and 433 transitions. [2022-01-31 20:49:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 20:49:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 20:49:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:10,566 INFO L225 Difference]: With dead ends: 341 [2022-01-31 20:49:10,566 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 20:49:10,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:49:10,567 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 970 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:10,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 37 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 20:49:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 112. [2022-01-31 20:49:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-01-31 20:49:10,614 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2022-01-31 20:49:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:10,614 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-01-31 20:49:10,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-01-31 20:49:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 20:49:10,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:10,615 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:10,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:49:10,615 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 44 times [2022-01-31 20:49:10,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:10,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128257581] [2022-01-31 20:49:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:10,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:10,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:10,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:10,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:11,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:11,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128257581] [2022-01-31 20:49:11,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [128257581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:11,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:11,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:49:11,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761807456] [2022-01-31 20:49:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:11,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:49:11,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:49:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:49:11,278 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:13,850 INFO L93 Difference]: Finished difference Result 348 states and 442 transitions. [2022-01-31 20:49:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:49:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 20:49:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:13,851 INFO L225 Difference]: With dead ends: 348 [2022-01-31 20:49:13,851 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 20:49:13,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:49:13,852 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1237 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:13,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 27 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 20:49:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 114. [2022-01-31 20:49:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-01-31 20:49:13,902 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2022-01-31 20:49:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:13,902 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-01-31 20:49:13,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-01-31 20:49:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 20:49:13,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:13,903 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:13,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:49:13,903 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 45 times [2022-01-31 20:49:13,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:13,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992234430] [2022-01-31 20:49:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:13,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:13,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:13,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:13,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:14,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:14,600 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 20:49:14,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:14,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992234430] [2022-01-31 20:49:14,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1992234430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:14,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:14,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:49:14,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660810748] [2022-01-31 20:49:14,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:14,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:49:14,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:49:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:49:14,601 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:17,286 INFO L93 Difference]: Finished difference Result 355 states and 451 transitions. [2022-01-31 20:49:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 20:49:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 20:49:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:17,288 INFO L225 Difference]: With dead ends: 355 [2022-01-31 20:49:17,288 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 20:49:17,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:49:17,289 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1076 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:17,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 52 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 20:49:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-01-31 20:49:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-01-31 20:49:17,340 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2022-01-31 20:49:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:17,340 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-01-31 20:49:17,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-01-31 20:49:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 20:49:17,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:17,341 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:17,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:49:17,341 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 46 times [2022-01-31 20:49:17,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:17,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448298152] [2022-01-31 20:49:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:17,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:17,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:17,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:17,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:18,052 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 20:49:18,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:18,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448298152] [2022-01-31 20:49:18,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448298152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:18,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:18,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:49:18,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546546069] [2022-01-31 20:49:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:18,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:49:18,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:18,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:49:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:49:18,054 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:20,926 INFO L93 Difference]: Finished difference Result 362 states and 460 transitions. [2022-01-31 20:49:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 20:49:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 20:49:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:20,928 INFO L225 Difference]: With dead ends: 362 [2022-01-31 20:49:20,928 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 20:49:20,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:49:20,928 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:20,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 37 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 20:49:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 118. [2022-01-31 20:49:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-01-31 20:49:20,987 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2022-01-31 20:49:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:20,987 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-01-31 20:49:20,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-01-31 20:49:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 20:49:20,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:20,988 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:20,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:49:20,988 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 47 times [2022-01-31 20:49:20,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:20,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875778614] [2022-01-31 20:49:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:20,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:20,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:20,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:20,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:21,736 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 20:49:21,737 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875778614] [2022-01-31 20:49:21,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875778614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:21,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:21,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 20:49:21,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984214697] [2022-01-31 20:49:21,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:21,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 20:49:21,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 20:49:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:49:21,738 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:24,755 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2022-01-31 20:49:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:49:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 20:49:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:24,757 INFO L225 Difference]: With dead ends: 369 [2022-01-31 20:49:24,757 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 20:49:24,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:49:24,757 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1437 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:24,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 27 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 20:49:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2022-01-31 20:49:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-01-31 20:49:24,813 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-01-31 20:49:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:24,813 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-01-31 20:49:24,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-01-31 20:49:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 20:49:24,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:24,814 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:24,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:49:24,814 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 48 times [2022-01-31 20:49:24,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:24,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688194984] [2022-01-31 20:49:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:24,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:24,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:24,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:24,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:25,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:25,564 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 20:49:25,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:25,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688194984] [2022-01-31 20:49:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [688194984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:25,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:25,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 20:49:25,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865884826] [2022-01-31 20:49:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:25,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 20:49:25,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:25,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 20:49:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:49:25,566 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:28,729 INFO L93 Difference]: Finished difference Result 376 states and 478 transitions. [2022-01-31 20:49:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 20:49:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 20:49:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:28,731 INFO L225 Difference]: With dead ends: 376 [2022-01-31 20:49:28,731 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 20:49:28,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:49:28,732 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1202 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 42 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:49:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 20:49:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 122. [2022-01-31 20:49:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-01-31 20:49:28,790 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2022-01-31 20:49:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:28,790 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-01-31 20:49:28,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-01-31 20:49:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 20:49:28,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:28,791 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:28,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:49:28,791 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 49 times [2022-01-31 20:49:28,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085661600] [2022-01-31 20:49:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:28,793 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:28,793 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:28,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:28,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:29,604 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 20:49:29,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:29,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085661600] [2022-01-31 20:49:29,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085661600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:29,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:29,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 20:49:29,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308992820] [2022-01-31 20:49:29,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:29,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 20:49:29,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 20:49:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 20:49:29,606 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:33,001 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2022-01-31 20:49:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:49:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 20:49:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:33,002 INFO L225 Difference]: With dead ends: 383 [2022-01-31 20:49:33,002 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 20:49:33,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:49:33,003 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1235 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:33,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 42 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 20:49:33,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 124. [2022-01-31 20:49:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-01-31 20:49:33,064 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2022-01-31 20:49:33,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:33,064 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-01-31 20:49:33,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-01-31 20:49:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 20:49:33,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:33,065 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:33,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:49:33,065 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:33,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 50 times [2022-01-31 20:49:33,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:33,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008391405] [2022-01-31 20:49:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:33,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:33,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:33,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:33,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:33,929 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 20:49:33,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:33,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008391405] [2022-01-31 20:49:33,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008391405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:33,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:33,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 20:49:33,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992002221] [2022-01-31 20:49:33,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:33,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 20:49:33,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 20:49:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 20:49:33,931 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:37,468 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2022-01-31 20:49:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:49:37,468 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 20:49:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:37,470 INFO L225 Difference]: With dead ends: 390 [2022-01-31 20:49:37,470 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 20:49:37,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:49:37,470 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:37,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 37 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 20:49:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 126. [2022-01-31 20:49:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-01-31 20:49:37,534 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2022-01-31 20:49:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:37,534 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-01-31 20:49:37,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-01-31 20:49:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 20:49:37,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:37,535 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:49:37,535 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 51 times [2022-01-31 20:49:37,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:37,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791833684] [2022-01-31 20:49:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:37,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:37,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:37,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:37,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:38,382 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 20:49:38,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791833684] [2022-01-31 20:49:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791833684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:38,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 20:49:38,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59878592] [2022-01-31 20:49:38,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:38,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 20:49:38,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 20:49:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 20:49:38,384 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:42,107 INFO L93 Difference]: Finished difference Result 397 states and 505 transitions. [2022-01-31 20:49:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:49:42,107 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 20:49:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:42,108 INFO L225 Difference]: With dead ends: 397 [2022-01-31 20:49:42,108 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 20:49:42,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:49:42,112 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1208 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1208 Valid, 37 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 20:49:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 128. [2022-01-31 20:49:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-01-31 20:49:42,182 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2022-01-31 20:49:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:42,182 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-01-31 20:49:42,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-01-31 20:49:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 20:49:42,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:42,183 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:42,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:49:42,183 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 52 times [2022-01-31 20:49:42,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:42,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926424012] [2022-01-31 20:49:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:42,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:42,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:42,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:42,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:43,070 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 20:49:43,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926424012] [2022-01-31 20:49:43,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926424012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:43,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:43,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 20:49:43,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302173870] [2022-01-31 20:49:43,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:43,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 20:49:43,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 20:49:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 20:49:43,072 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:47,019 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-01-31 20:49:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:49:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 20:49:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:47,020 INFO L225 Difference]: With dead ends: 404 [2022-01-31 20:49:47,020 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 20:49:47,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:49:47,021 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1360 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:47,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 37 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 20:49:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 130. [2022-01-31 20:49:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-01-31 20:49:47,092 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2022-01-31 20:49:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:47,092 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-01-31 20:49:47,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-01-31 20:49:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 20:49:47,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:47,093 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:47,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:49:47,093 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 53 times [2022-01-31 20:49:47,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:47,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363869674] [2022-01-31 20:49:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:47,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:47,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:47,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:47,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:47,995 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 20:49:47,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363869674] [2022-01-31 20:49:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [363869674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 20:49:47,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656939740] [2022-01-31 20:49:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 20:49:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 20:49:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 20:49:47,997 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:52,261 INFO L93 Difference]: Finished difference Result 411 states and 523 transitions. [2022-01-31 20:49:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:49:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 20:49:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:52,272 INFO L225 Difference]: With dead ends: 411 [2022-01-31 20:49:52,272 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 20:49:52,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:49:52,273 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:52,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 42 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 20:49:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 132. [2022-01-31 20:49:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-01-31 20:49:52,347 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2022-01-31 20:49:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:52,348 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-01-31 20:49:52,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-01-31 20:49:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 20:49:52,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:52,348 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:52,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:49:52,349 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:52,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 54 times [2022-01-31 20:49:52,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:52,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375470365] [2022-01-31 20:49:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:52,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:52,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:52,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:52,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:53,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:53,295 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 20:49:53,295 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375470365] [2022-01-31 20:49:53,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [375470365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:53,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 20:49:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524198186] [2022-01-31 20:49:53,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 20:49:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 20:49:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 20:49:53,297 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:57,786 INFO L93 Difference]: Finished difference Result 418 states and 532 transitions. [2022-01-31 20:49:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:49:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 20:49:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:57,788 INFO L225 Difference]: With dead ends: 418 [2022-01-31 20:49:57,788 INFO L226 Difference]: Without dead ends: 401 [2022-01-31 20:49:57,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:49:57,789 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1309 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:57,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1309 Valid, 47 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:49:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-31 20:49:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 134. [2022-01-31 20:49:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-01-31 20:49:57,865 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2022-01-31 20:49:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:57,865 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-01-31 20:49:57,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-01-31 20:49:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 20:49:57,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:57,866 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:57,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:49:57,866 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 55 times [2022-01-31 20:49:57,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:57,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421176066] [2022-01-31 20:49:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:57,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:57,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:57,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:57,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:58,840 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 20:49:58,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:58,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421176066] [2022-01-31 20:49:58,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421176066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:58,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:58,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 20:49:58,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914151063] [2022-01-31 20:49:58,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:58,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 20:49:58,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 20:49:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 20:49:58,841 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:03,576 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2022-01-31 20:50:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:50:03,577 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 20:50:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:03,578 INFO L225 Difference]: With dead ends: 425 [2022-01-31 20:50:03,578 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 20:50:03,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:50:03,579 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1373 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:03,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 42 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 20:50:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 136. [2022-01-31 20:50:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-01-31 20:50:03,657 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2022-01-31 20:50:03,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:03,657 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-01-31 20:50:03,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-01-31 20:50:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 20:50:03,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:03,658 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:03,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:50:03,658 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 56 times [2022-01-31 20:50:03,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:03,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734079355] [2022-01-31 20:50:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:03,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:03,660 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:03,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:03,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:04,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:04,682 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 20:50:04,682 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734079355] [2022-01-31 20:50:04,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [734079355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:04,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:04,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 20:50:04,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966067803] [2022-01-31 20:50:04,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 20:50:04,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 20:50:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 20:50:04,684 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:09,598 INFO L93 Difference]: Finished difference Result 432 states and 550 transitions. [2022-01-31 20:50:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:50:09,598 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 20:50:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:09,599 INFO L225 Difference]: With dead ends: 432 [2022-01-31 20:50:09,599 INFO L226 Difference]: Without dead ends: 415 [2022-01-31 20:50:09,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:50:09,600 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1373 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:09,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 47 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-31 20:50:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 138. [2022-01-31 20:50:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-01-31 20:50:09,682 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2022-01-31 20:50:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:09,682 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-01-31 20:50:09,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-01-31 20:50:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 20:50:09,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:09,683 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:09,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:50:09,683 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 57 times [2022-01-31 20:50:09,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:09,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32909763] [2022-01-31 20:50:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:09,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:09,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:09,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:09,686 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:10,730 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 20:50:10,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32909763] [2022-01-31 20:50:10,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [32909763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:10,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:10,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 20:50:10,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564206026] [2022-01-31 20:50:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:10,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 20:50:10,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 20:50:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 20:50:10,732 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:15,913 INFO L93 Difference]: Finished difference Result 439 states and 559 transitions. [2022-01-31 20:50:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:50:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 20:50:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:15,915 INFO L225 Difference]: With dead ends: 439 [2022-01-31 20:50:15,915 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 20:50:15,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:50:15,916 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1369 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:15,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 42 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 20:50:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 140. [2022-01-31 20:50:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-01-31 20:50:16,002 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2022-01-31 20:50:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:16,002 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-01-31 20:50:16,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-01-31 20:50:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 20:50:16,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:16,003 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:16,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:50:16,003 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 58 times [2022-01-31 20:50:16,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:16,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253866584] [2022-01-31 20:50:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:16,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:16,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:16,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:16,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:17,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:50:17,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253866584] [2022-01-31 20:50:17,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [253866584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:17,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:17,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 20:50:17,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211517271] [2022-01-31 20:50:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:17,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 20:50:17,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 20:50:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:50:17,048 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:22,480 INFO L93 Difference]: Finished difference Result 446 states and 568 transitions. [2022-01-31 20:50:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:50:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 20:50:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:22,481 INFO L225 Difference]: With dead ends: 446 [2022-01-31 20:50:22,481 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 20:50:22,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:50:22,482 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1400 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:22,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 42 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 20:50:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 142. [2022-01-31 20:50:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-01-31 20:50:22,571 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2022-01-31 20:50:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:22,572 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-01-31 20:50:22,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-01-31 20:50:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 20:50:22,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:22,572 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:22,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:50:22,572 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 59 times [2022-01-31 20:50:22,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:22,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457447421] [2022-01-31 20:50:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:22,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:22,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:22,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:22,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:23,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:23,649 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 20:50:23,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457447421] [2022-01-31 20:50:23,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [457447421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:23,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:23,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 20:50:23,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551222137] [2022-01-31 20:50:23,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:23,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 20:50:23,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 20:50:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 20:50:23,651 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:29,310 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2022-01-31 20:50:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 20:50:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 20:50:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:29,311 INFO L225 Difference]: With dead ends: 453 [2022-01-31 20:50:29,311 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 20:50:29,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:50:29,312 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1386 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:29,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 37 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 20:50:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 144. [2022-01-31 20:50:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-01-31 20:50:29,403 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2022-01-31 20:50:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:29,403 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-01-31 20:50:29,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-01-31 20:50:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 20:50:29,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:29,404 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:29,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:50:29,404 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 60 times [2022-01-31 20:50:29,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037221914] [2022-01-31 20:50:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:29,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:29,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:29,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:29,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:30,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:30,544 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 20:50:30,545 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:30,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037221914] [2022-01-31 20:50:30,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037221914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:30,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:30,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 20:50:30,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229644278] [2022-01-31 20:50:30,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:30,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 20:50:30,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 20:50:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 20:50:30,546 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:36,492 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2022-01-31 20:50:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:50:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 20:50:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:36,494 INFO L225 Difference]: With dead ends: 460 [2022-01-31 20:50:36,494 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 20:50:36,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:50:36,495 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1535 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:36,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 52 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 20:50:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 146. [2022-01-31 20:50:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 141 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-01-31 20:50:36,591 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2022-01-31 20:50:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:36,591 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-01-31 20:50:36,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-01-31 20:50:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 20:50:36,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:36,591 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:36,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:50:36,592 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 61 times [2022-01-31 20:50:36,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461770252] [2022-01-31 20:50:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:36,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:36,593 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:36,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:36,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:37,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:37,779 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 20:50:37,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:37,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461770252] [2022-01-31 20:50:37,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [461770252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:37,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:37,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 20:50:37,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335533686] [2022-01-31 20:50:37,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:37,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 20:50:37,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 20:50:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 20:50:37,781 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:44,108 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2022-01-31 20:50:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:50:44,109 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 20:50:44,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:44,110 INFO L225 Difference]: With dead ends: 467 [2022-01-31 20:50:44,110 INFO L226 Difference]: Without dead ends: 450 [2022-01-31 20:50:44,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:50:44,111 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1910 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:44,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 27 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:50:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-31 20:50:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 148. [2022-01-31 20:50:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-01-31 20:50:44,212 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2022-01-31 20:50:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:44,212 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-01-31 20:50:44,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-01-31 20:50:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 20:50:44,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:44,212 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:44,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:50:44,213 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 62 times [2022-01-31 20:50:44,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779416726] [2022-01-31 20:50:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:44,214 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:44,214 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:44,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:44,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:45,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:45,404 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 20:50:45,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779416726] [2022-01-31 20:50:45,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779416726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:45,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:45,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 20:50:45,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879501743] [2022-01-31 20:50:45,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:45,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 20:50:45,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 20:50:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 20:50:45,406 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:51,922 INFO L93 Difference]: Finished difference Result 474 states and 604 transitions. [2022-01-31 20:50:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 20:50:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 20:50:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:51,927 INFO L225 Difference]: With dead ends: 474 [2022-01-31 20:50:51,927 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 20:50:51,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:50:51,928 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1437 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:51,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 37 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:50:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 20:50:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 150. [2022-01-31 20:50:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-01-31 20:50:52,031 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2022-01-31 20:50:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:52,031 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-01-31 20:50:52,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-01-31 20:50:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 20:50:52,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:52,032 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:52,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:50:52,032 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 63 times [2022-01-31 20:50:52,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:52,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793636286] [2022-01-31 20:50:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:52,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:52,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:52,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:52,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:53,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:53,259 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 20:50:53,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793636286] [2022-01-31 20:50:53,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793636286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:53,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:53,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 20:50:53,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744406212] [2022-01-31 20:50:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 20:50:53,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 20:50:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 20:50:53,261 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:00,161 INFO L93 Difference]: Finished difference Result 481 states and 613 transitions. [2022-01-31 20:51:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:51:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 20:51:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:00,162 INFO L225 Difference]: With dead ends: 481 [2022-01-31 20:51:00,162 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 20:51:00,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:51:00,163 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1503 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:00,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 47 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:51:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 20:51:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 152. [2022-01-31 20:51:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-01-31 20:51:00,270 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2022-01-31 20:51:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:00,270 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-01-31 20:51:00,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-01-31 20:51:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 20:51:00,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:00,271 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:00,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:51:00,271 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 64 times [2022-01-31 20:51:00,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:00,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248141626] [2022-01-31 20:51:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:00,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:00,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:00,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:00,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:01,528 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 20:51:01,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:01,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248141626] [2022-01-31 20:51:01,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248141626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:01,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:01,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 20:51:01,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762235695] [2022-01-31 20:51:01,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 20:51:01,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 20:51:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:51:01,531 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:08,824 INFO L93 Difference]: Finished difference Result 488 states and 622 transitions. [2022-01-31 20:51:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 20:51:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 20:51:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:08,826 INFO L225 Difference]: With dead ends: 488 [2022-01-31 20:51:08,826 INFO L226 Difference]: Without dead ends: 471 [2022-01-31 20:51:08,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:51:08,827 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1541 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:08,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 52 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-31 20:51:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 154. [2022-01-31 20:51:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-01-31 20:51:08,941 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2022-01-31 20:51:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:08,942 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-01-31 20:51:08,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-01-31 20:51:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 20:51:08,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:08,942 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:08,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:51:08,942 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 65 times [2022-01-31 20:51:08,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:08,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308340748] [2022-01-31 20:51:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:08,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:08,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:08,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:08,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:10,211 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 20:51:10,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:10,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308340748] [2022-01-31 20:51:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308340748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:10,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:10,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 20:51:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360297283] [2022-01-31 20:51:10,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:10,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 20:51:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 20:51:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 20:51:10,213 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:17,792 INFO L93 Difference]: Finished difference Result 495 states and 631 transitions. [2022-01-31 20:51:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:51:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 20:51:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:17,794 INFO L225 Difference]: With dead ends: 495 [2022-01-31 20:51:17,794 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 20:51:17,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:51:17,795 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1465 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:17,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 52 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 20:51:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 156. [2022-01-31 20:51:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-01-31 20:51:17,910 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2022-01-31 20:51:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:17,911 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-01-31 20:51:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-01-31 20:51:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 20:51:17,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:17,911 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:17,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 20:51:17,911 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 66 times [2022-01-31 20:51:17,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982302346] [2022-01-31 20:51:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:17,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:17,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:17,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:17,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:19,264 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 20:51:19,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:19,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982302346] [2022-01-31 20:51:19,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [982302346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:19,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:19,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 20:51:19,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439043543] [2022-01-31 20:51:19,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:19,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 20:51:19,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 20:51:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 20:51:19,266 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:27,163 INFO L93 Difference]: Finished difference Result 502 states and 640 transitions. [2022-01-31 20:51:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 20:51:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 20:51:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:27,165 INFO L225 Difference]: With dead ends: 502 [2022-01-31 20:51:27,165 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 20:51:27,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:51:27,166 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1780 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:27,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 37 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 20:51:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 158. [2022-01-31 20:51:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-01-31 20:51:27,284 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2022-01-31 20:51:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:27,284 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-01-31 20:51:27,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-01-31 20:51:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 20:51:27,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:27,285 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:27,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 20:51:27,285 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 67 times [2022-01-31 20:51:27,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:27,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022632293] [2022-01-31 20:51:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:27,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:27,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:27,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:27,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:28,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:28,650 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 20:51:28,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022632293] [2022-01-31 20:51:28,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022632293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:28,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:28,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 20:51:28,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014419587] [2022-01-31 20:51:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:28,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 20:51:28,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:28,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 20:51:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 20:51:28,652 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:36,910 INFO L93 Difference]: Finished difference Result 509 states and 649 transitions. [2022-01-31 20:51:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:51:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 20:51:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:36,912 INFO L225 Difference]: With dead ends: 509 [2022-01-31 20:51:36,912 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 20:51:36,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:51:36,913 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1515 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:36,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 52 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 20:51:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 160. [2022-01-31 20:51:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-01-31 20:51:37,034 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2022-01-31 20:51:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:37,035 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-01-31 20:51:37,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-01-31 20:51:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 20:51:37,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:37,035 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:37,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 20:51:37,036 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 68 times [2022-01-31 20:51:37,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:37,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541009241] [2022-01-31 20:51:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:37,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:37,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:37,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:37,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:38,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:38,412 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 20:51:38,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:38,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541009241] [2022-01-31 20:51:38,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541009241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:38,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:38,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 20:51:38,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287158616] [2022-01-31 20:51:38,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:38,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 20:51:38,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 20:51:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 20:51:38,414 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:46,941 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2022-01-31 20:51:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 20:51:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 20:51:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:46,942 INFO L225 Difference]: With dead ends: 516 [2022-01-31 20:51:46,942 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 20:51:46,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:51:46,943 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1680 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:46,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 42 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 20:51:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 162. [2022-01-31 20:51:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-01-31 20:51:47,068 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2022-01-31 20:51:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:47,069 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-01-31 20:51:47,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-01-31 20:51:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 20:51:47,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:47,069 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:47,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 20:51:47,070 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 69 times [2022-01-31 20:51:47,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:47,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314739385] [2022-01-31 20:51:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:47,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:47,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:47,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:47,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:48,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:48,492 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 20:51:48,492 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:48,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314739385] [2022-01-31 20:51:48,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314739385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:48,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:48,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 20:51:48,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785976424] [2022-01-31 20:51:48,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:48,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 20:51:48,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 20:51:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 20:51:48,494 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:57,461 INFO L93 Difference]: Finished difference Result 523 states and 667 transitions. [2022-01-31 20:51:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:51:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 20:51:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:57,463 INFO L225 Difference]: With dead ends: 523 [2022-01-31 20:51:57,463 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 20:51:57,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:51:57,464 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1621 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:57,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 52 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:51:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 20:51:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 164. [2022-01-31 20:51:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 159 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-01-31 20:51:57,597 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2022-01-31 20:51:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:57,597 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-01-31 20:51:57,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-01-31 20:51:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 20:51:57,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:57,598 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:57,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 20:51:57,598 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 70 times [2022-01-31 20:51:57,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:57,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768552536] [2022-01-31 20:51:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:57,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:57,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:57,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:57,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:59,053 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 20:51:59,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:59,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768552536] [2022-01-31 20:51:59,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768552536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:59,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:59,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 20:51:59,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513198786] [2022-01-31 20:51:59,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:59,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 20:51:59,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:59,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 20:51:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:51:59,055 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:08,543 INFO L93 Difference]: Finished difference Result 530 states and 676 transitions. [2022-01-31 20:52:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 20:52:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 20:52:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:08,545 INFO L225 Difference]: With dead ends: 530 [2022-01-31 20:52:08,545 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 20:52:08,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:52:08,546 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1725 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1725 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:08,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1725 Valid, 57 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:52:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 20:52:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 166. [2022-01-31 20:52:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-01-31 20:52:08,684 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2022-01-31 20:52:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:08,684 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-01-31 20:52:08,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-01-31 20:52:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 20:52:08,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:08,685 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:08,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 20:52:08,685 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:08,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 71 times [2022-01-31 20:52:08,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:08,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946023095] [2022-01-31 20:52:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:08,686 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:08,686 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:08,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:08,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:52:10,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946023095] [2022-01-31 20:52:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [946023095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:10,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:10,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 20:52:10,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56194153] [2022-01-31 20:52:10,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:10,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 20:52:10,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 20:52:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 20:52:10,185 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:20,031 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2022-01-31 20:52:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 20:52:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 20:52:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:20,033 INFO L225 Difference]: With dead ends: 537 [2022-01-31 20:52:20,033 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 20:52:20,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:52:20,034 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1691 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:20,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1691 Valid, 47 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:52:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 20:52:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 168. [2022-01-31 20:52:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-01-31 20:52:20,179 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 165 [2022-01-31 20:52:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:20,179 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-01-31 20:52:20,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-01-31 20:52:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 20:52:20,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:20,180 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:20,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 20:52:20,180 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 72 times [2022-01-31 20:52:20,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929081517] [2022-01-31 20:52:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:20,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:20,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:20,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:20,184 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:21,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:21,752 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 20:52:21,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:21,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929081517] [2022-01-31 20:52:21,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [929081517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:21,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:21,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 20:52:21,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603161398] [2022-01-31 20:52:21,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 20:52:21,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:21,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 20:52:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 20:52:21,755 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:32,119 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2022-01-31 20:52:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 20:52:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 20:52:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:32,121 INFO L225 Difference]: With dead ends: 544 [2022-01-31 20:52:32,121 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 20:52:32,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 20:52:32,122 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1986 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:32,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 47 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:52:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 20:52:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 170. [2022-01-31 20:52:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-01-31 20:52:32,270 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 167 [2022-01-31 20:52:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:32,270 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-01-31 20:52:32,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-01-31 20:52:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 20:52:32,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:32,271 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 20:52:32,271 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 73 times [2022-01-31 20:52:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236803063] [2022-01-31 20:52:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:32,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:32,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:32,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:32,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:33,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:33,834 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 20:52:33,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236803063] [2022-01-31 20:52:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236803063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:33,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:33,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 20:52:33,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220429889] [2022-01-31 20:52:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:33,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 20:52:33,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 20:52:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 20:52:33,836 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:44,701 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2022-01-31 20:52:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 20:52:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 20:52:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:44,703 INFO L225 Difference]: With dead ends: 551 [2022-01-31 20:52:44,703 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 20:52:44,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:52:44,704 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1812 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:44,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 42 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:52:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 20:52:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 172. [2022-01-31 20:52:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-01-31 20:52:44,855 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 169 [2022-01-31 20:52:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:44,855 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-01-31 20:52:44,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-01-31 20:52:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 20:52:44,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:44,856 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:44,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 20:52:44,856 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 74 times [2022-01-31 20:52:44,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:44,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594716049] [2022-01-31 20:52:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:44,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:44,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:44,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:44,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:46,521 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 20:52:46,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594716049] [2022-01-31 20:52:46,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [594716049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:46,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:46,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 20:52:46,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441867722] [2022-01-31 20:52:46,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:46,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 20:52:46,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 20:52:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 20:52:46,524 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:57,894 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2022-01-31 20:52:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 20:52:57,895 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 20:52:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:57,896 INFO L225 Difference]: With dead ends: 558 [2022-01-31 20:52:57,896 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 20:52:57,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 20:52:57,897 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1604 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:57,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 67 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:52:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 20:52:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 174. [2022-01-31 20:52:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-01-31 20:52:58,052 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2022-01-31 20:52:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:58,052 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-01-31 20:52:58,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-01-31 20:52:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 20:52:58,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:58,053 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:58,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 20:52:58,053 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 75 times [2022-01-31 20:52:58,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:58,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345499907] [2022-01-31 20:52:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:58,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:58,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:58,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:58,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:59,697 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 20:52:59,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345499907] [2022-01-31 20:52:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [345499907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:59,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:59,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 20:52:59,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421473272] [2022-01-31 20:52:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:59,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 20:52:59,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 20:52:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 20:52:59,699 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:11,579 INFO L93 Difference]: Finished difference Result 565 states and 721 transitions. [2022-01-31 20:53:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 20:53:11,579 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 20:53:11,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:11,581 INFO L225 Difference]: With dead ends: 565 [2022-01-31 20:53:11,581 INFO L226 Difference]: Without dead ends: 548 [2022-01-31 20:53:11,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 20:53:11,582 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1944 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:11,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1944 Valid, 47 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-31 20:53:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 176. [2022-01-31 20:53:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-01-31 20:53:11,746 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2022-01-31 20:53:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,746 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-01-31 20:53:11,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-01-31 20:53:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 20:53:11,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,747 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:11,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 20:53:11,748 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 76 times [2022-01-31 20:53:11,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498709762] [2022-01-31 20:53:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:11,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:11,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:13,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:13,534 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 20:53:13,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:13,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498709762] [2022-01-31 20:53:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [498709762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:13,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:13,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 20:53:13,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995110094] [2022-01-31 20:53:13,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:13,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 20:53:13,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 20:53:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 20:53:13,536 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:26,083 INFO L93 Difference]: Finished difference Result 572 states and 730 transitions. [2022-01-31 20:53:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 20:53:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 20:53:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:26,085 INFO L225 Difference]: With dead ends: 572 [2022-01-31 20:53:26,085 INFO L226 Difference]: Without dead ends: 555 [2022-01-31 20:53:26,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 20:53:26,086 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1676 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:26,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 67 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:26,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-31 20:53:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 178. [2022-01-31 20:53:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-01-31 20:53:26,254 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2022-01-31 20:53:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-01-31 20:53:26,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-01-31 20:53:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 20:53:26,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:26,255 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:26,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 20:53:26,255 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 77 times [2022-01-31 20:53:26,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140462925] [2022-01-31 20:53:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:26,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:26,256 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:26,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:26,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:28,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:28,006 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 20:53:28,006 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140462925] [2022-01-31 20:53:28,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2140462925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:28,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:28,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 20:53:28,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756109440] [2022-01-31 20:53:28,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:28,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 20:53:28,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 20:53:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 20:53:28,008 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:41,058 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2022-01-31 20:53:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 20:53:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 20:53:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:41,060 INFO L225 Difference]: With dead ends: 579 [2022-01-31 20:53:41,060 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 20:53:41,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 20:53:41,061 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2484 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2484 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:41,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2484 Valid, 22 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 20:53:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 180. [2022-01-31 20:53:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-01-31 20:53:41,235 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2022-01-31 20:53:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:41,236 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-01-31 20:53:41,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-01-31 20:53:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 20:53:41,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:41,236 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:41,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 20:53:41,237 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:41,237 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 78 times [2022-01-31 20:53:41,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:41,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509858616] [2022-01-31 20:53:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:41,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:41,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:41,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:41,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:43,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:43,021 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 20:53:43,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509858616] [2022-01-31 20:53:43,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509858616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:43,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:43,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 20:53:43,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317592120] [2022-01-31 20:53:43,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:43,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 20:53:43,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 20:53:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 20:53:43,023 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:56,434 INFO L93 Difference]: Finished difference Result 586 states and 748 transitions. [2022-01-31 20:53:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 20:53:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 20:53:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:56,435 INFO L225 Difference]: With dead ends: 586 [2022-01-31 20:53:56,436 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 20:53:56,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 20:53:56,437 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2022 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:56,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2022 Valid, 37 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:53:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 20:53:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 182. [2022-01-31 20:53:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-01-31 20:53:56,611 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2022-01-31 20:53:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:56,612 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-01-31 20:53:56,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-01-31 20:53:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 20:53:56,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:56,612 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:56,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 20:53:56,613 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:56,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 79 times [2022-01-31 20:53:56,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:56,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129085401] [2022-01-31 20:53:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:56,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:56,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:56,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:56,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:58,432 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 20:53:58,432 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129085401] [2022-01-31 20:53:58,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129085401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:58,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:58,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 20:53:58,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807478906] [2022-01-31 20:53:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 20:53:58,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 20:53:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 20:53:58,435 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:12,347 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2022-01-31 20:54:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 20:54:12,347 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 20:54:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:12,349 INFO L225 Difference]: With dead ends: 593 [2022-01-31 20:54:12,349 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 20:54:12,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 20:54:12,350 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2030 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:12,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2030 Valid, 47 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:54:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 20:54:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 184. [2022-01-31 20:54:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-01-31 20:54:12,528 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2022-01-31 20:54:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:12,529 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-01-31 20:54:12,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-01-31 20:54:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 20:54:12,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:12,530 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:12,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 20:54:12,530 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:12,530 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 80 times [2022-01-31 20:54:12,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:12,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350813420] [2022-01-31 20:54:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:12,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:12,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:12,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:12,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:14,432 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 20:54:14,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350813420] [2022-01-31 20:54:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350813420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:14,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:14,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 20:54:14,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616676656] [2022-01-31 20:54:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 20:54:14,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 20:54:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 20:54:14,434 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:28,931 INFO L93 Difference]: Finished difference Result 600 states and 766 transitions. [2022-01-31 20:54:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 20:54:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 20:54:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:28,933 INFO L225 Difference]: With dead ends: 600 [2022-01-31 20:54:28,933 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 20:54:28,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 20:54:28,934 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1923 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:28,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1923 Valid, 72 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:54:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 20:54:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2022-01-31 20:54:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-01-31 20:54:29,118 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2022-01-31 20:54:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:29,119 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-01-31 20:54:29,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-01-31 20:54:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 20:54:29,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:29,120 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:29,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 20:54:29,120 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 81 times [2022-01-31 20:54:29,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211631284] [2022-01-31 20:54:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:29,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:29,121 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:29,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:29,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:31,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:31,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:31,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211631284] [2022-01-31 20:54:31,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211631284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:31,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:31,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 20:54:31,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318084845] [2022-01-31 20:54:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 20:54:31,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 20:54:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 20:54:31,047 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:46,033 INFO L93 Difference]: Finished difference Result 607 states and 775 transitions. [2022-01-31 20:54:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 20:54:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 20:54:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:46,035 INFO L225 Difference]: With dead ends: 607 [2022-01-31 20:54:46,035 INFO L226 Difference]: Without dead ends: 590 [2022-01-31 20:54:46,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 20:54:46,036 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2180 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:46,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2180 Valid, 32 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:54:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-31 20:54:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 188. [2022-01-31 20:54:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-01-31 20:54:46,224 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2022-01-31 20:54:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:46,224 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-01-31 20:54:46,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-01-31 20:54:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 20:54:46,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:46,225 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:46,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 20:54:46,225 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 82 times [2022-01-31 20:54:46,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:46,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163229919] [2022-01-31 20:54:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:46,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:46,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:46,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:46,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:48,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:48,203 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 20:54:48,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:48,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163229919] [2022-01-31 20:54:48,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163229919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:48,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:48,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 20:54:48,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767196156] [2022-01-31 20:54:48,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:48,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 20:54:48,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 20:54:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 20:54:48,206 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:03,594 INFO L93 Difference]: Finished difference Result 614 states and 784 transitions. [2022-01-31 20:55:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 20:55:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 20:55:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:03,596 INFO L225 Difference]: With dead ends: 614 [2022-01-31 20:55:03,596 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 20:55:03,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 20:55:03,598 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2136 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:03,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 52 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:55:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 20:55:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 190. [2022-01-31 20:55:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-01-31 20:55:03,798 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2022-01-31 20:55:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:03,798 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-01-31 20:55:03,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-01-31 20:55:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 20:55:03,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:03,799 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:03,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 20:55:03,799 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:03,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:03,800 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 83 times [2022-01-31 20:55:03,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:03,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790947471] [2022-01-31 20:55:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:03,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:03,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:03,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:03,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:05,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:05,909 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 20:55:05,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:05,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790947471] [2022-01-31 20:55:05,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790947471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:05,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:05,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 20:55:05,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119519457] [2022-01-31 20:55:05,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:05,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 20:55:05,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 20:55:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:55:05,911 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:22,052 INFO L93 Difference]: Finished difference Result 621 states and 793 transitions. [2022-01-31 20:55:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 20:55:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 20:55:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:22,054 INFO L225 Difference]: With dead ends: 621 [2022-01-31 20:55:22,054 INFO L226 Difference]: Without dead ends: 604 [2022-01-31 20:55:22,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 20:55:22,055 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2202 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2202 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:22,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2202 Valid, 52 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:55:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-31 20:55:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 192. [2022-01-31 20:55:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-01-31 20:55:22,257 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2022-01-31 20:55:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:22,257 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-01-31 20:55:22,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-01-31 20:55:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 20:55:22,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:22,258 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:22,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 20:55:22,258 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 84 times [2022-01-31 20:55:22,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:22,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7049618] [2022-01-31 20:55:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:22,259 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:22,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:22,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:22,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:24,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:24,319 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 20:55:24,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:24,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7049618] [2022-01-31 20:55:24,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7049618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:24,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:24,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 20:55:24,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312488159] [2022-01-31 20:55:24,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:24,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 20:55:24,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 20:55:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:55:24,321 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:40,940 INFO L93 Difference]: Finished difference Result 628 states and 802 transitions. [2022-01-31 20:55:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 20:55:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 20:55:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:40,942 INFO L225 Difference]: With dead ends: 628 [2022-01-31 20:55:40,942 INFO L226 Difference]: Without dead ends: 611 [2022-01-31 20:55:40,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 20:55:40,943 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2166 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:40,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2166 Valid, 52 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:55:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-31 20:55:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 194. [2022-01-31 20:55:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-01-31 20:55:41,155 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2022-01-31 20:55:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:55:41,155 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-01-31 20:55:41,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-01-31 20:55:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 20:55:41,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:55:41,156 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:55:41,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 20:55:41,156 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:55:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:55:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 85 times [2022-01-31 20:55:41,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:55:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305155067] [2022-01-31 20:55:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:55:41,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:55:41,158 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:55:41,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:55:41,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:55:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:43,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:55:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:55:43,259 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 20:55:43,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:55:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305155067] [2022-01-31 20:55:43,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305155067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:55:43,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:55:43,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 20:55:43,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132864368] [2022-01-31 20:55:43,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:55:43,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 20:55:43,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:55:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 20:55:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:55:43,261 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:00,471 INFO L93 Difference]: Finished difference Result 635 states and 811 transitions. [2022-01-31 20:56:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 20:56:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 20:56:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:00,473 INFO L225 Difference]: With dead ends: 635 [2022-01-31 20:56:00,473 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 20:56:00,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 20:56:00,474 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2758 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2758 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:00,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2758 Valid, 37 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:56:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 20:56:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 196. [2022-01-31 20:56:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-01-31 20:56:00,690 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2022-01-31 20:56:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:00,690 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-01-31 20:56:00,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-01-31 20:56:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 20:56:00,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:00,691 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:00,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 20:56:00,691 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 86 times [2022-01-31 20:56:00,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213899110] [2022-01-31 20:56:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:00,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:00,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:00,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:00,697 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:02,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:02,826 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 20:56:02,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:02,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213899110] [2022-01-31 20:56:02,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [213899110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:02,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:02,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 20:56:02,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082321596] [2022-01-31 20:56:02,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:02,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 20:56:02,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:02,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 20:56:02,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:56:02,829 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:20,898 INFO L93 Difference]: Finished difference Result 642 states and 820 transitions. [2022-01-31 20:56:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 20:56:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 20:56:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:20,900 INFO L225 Difference]: With dead ends: 642 [2022-01-31 20:56:20,900 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 20:56:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 20:56:20,901 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2719 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:20,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2719 Valid, 42 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:56:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 20:56:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 198. [2022-01-31 20:56:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-01-31 20:56:21,123 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2022-01-31 20:56:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:21,123 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-01-31 20:56:21,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-01-31 20:56:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 20:56:21,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:21,124 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:21,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 20:56:21,124 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 87 times [2022-01-31 20:56:21,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:21,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049529086] [2022-01-31 20:56:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:21,125 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:21,125 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:21,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:21,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:23,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:23,309 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 20:56:23,310 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:23,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049529086] [2022-01-31 20:56:23,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049529086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:23,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:23,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 20:56:23,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289318130] [2022-01-31 20:56:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:23,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 20:56:23,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 20:56:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:56:23,311 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:56:42,147 INFO L93 Difference]: Finished difference Result 649 states and 829 transitions. [2022-01-31 20:56:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 20:56:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 20:56:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:56:42,149 INFO L225 Difference]: With dead ends: 649 [2022-01-31 20:56:42,149 INFO L226 Difference]: Without dead ends: 632 [2022-01-31 20:56:42,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 20:56:42,150 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2146 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2146 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:56:42,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2146 Valid, 67 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:56:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-31 20:56:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 200. [2022-01-31 20:56:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0256410256410255) internal successors, (200), 195 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-01-31 20:56:42,378 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 197 [2022-01-31 20:56:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:56:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-01-31 20:56:42,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:56:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-01-31 20:56:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 20:56:42,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:56:42,379 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:56:42,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 20:56:42,379 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:56:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:56:42,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 88 times [2022-01-31 20:56:42,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:56:42,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335244986] [2022-01-31 20:56:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:56:42,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:56:42,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:56:42,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:56:42,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:56:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:56:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:56:44,599 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 20:56:44,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:56:44,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335244986] [2022-01-31 20:56:44,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335244986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:56:44,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:56:44,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 20:56:44,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142558682] [2022-01-31 20:56:44,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:56:44,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 20:56:44,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:56:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 20:56:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:56:44,601 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:03,944 INFO L93 Difference]: Finished difference Result 656 states and 838 transitions. [2022-01-31 20:57:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 20:57:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 20:57:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:03,945 INFO L225 Difference]: With dead ends: 656 [2022-01-31 20:57:03,945 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 20:57:03,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 20:57:03,947 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2488 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:03,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 32 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:57:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 20:57:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 202. [2022-01-31 20:57:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2022-01-31 20:57:04,180 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2022-01-31 20:57:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:04,180 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2022-01-31 20:57:04,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2022-01-31 20:57:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 20:57:04,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:04,181 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:04,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 20:57:04,181 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 89 times [2022-01-31 20:57:04,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898868529] [2022-01-31 20:57:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:04,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:04,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:04,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:04,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:06,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:06,462 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 20:57:06,462 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:06,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898868529] [2022-01-31 20:57:06,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [898868529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:06,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:06,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 20:57:06,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039502938] [2022-01-31 20:57:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:06,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 20:57:06,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 20:57:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:57:06,464 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:27,136 INFO L93 Difference]: Finished difference Result 663 states and 847 transitions. [2022-01-31 20:57:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 20:57:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 20:57:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:27,138 INFO L225 Difference]: With dead ends: 663 [2022-01-31 20:57:27,138 INFO L226 Difference]: Without dead ends: 646 [2022-01-31 20:57:27,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 20:57:27,139 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2226 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:27,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2226 Valid, 32 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:57:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-31 20:57:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 204. [2022-01-31 20:57:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-01-31 20:57:27,382 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 201 [2022-01-31 20:57:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:27,382 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-01-31 20:57:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-01-31 20:57:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 20:57:27,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:27,383 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:27,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 20:57:27,383 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 479558729, now seen corresponding path program 90 times [2022-01-31 20:57:27,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:27,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942031214] [2022-01-31 20:57:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:27,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:27,385 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:27,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:27,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:29,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:29,754 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 20:57:29,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942031214] [2022-01-31 20:57:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942031214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:29,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:29,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 20:57:29,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832788115] [2022-01-31 20:57:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:29,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 20:57:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 20:57:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 20:57:29,757 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:57:50,627 INFO L93 Difference]: Finished difference Result 670 states and 856 transitions. [2022-01-31 20:57:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 20:57:50,628 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 20:57:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:57:50,629 INFO L225 Difference]: With dead ends: 670 [2022-01-31 20:57:50,629 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 20:57:50,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 20:57:50,630 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2369 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:57:50,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 42 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:57:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 20:57:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 206. [2022-01-31 20:57:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-01-31 20:57:50,875 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 203 [2022-01-31 20:57:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:57:50,876 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-01-31 20:57:50,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:57:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-01-31 20:57:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 20:57:50,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:57:50,877 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:57:50,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 20:57:50,877 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:57:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:57:50,877 INFO L85 PathProgramCache]: Analyzing trace with hash 679486823, now seen corresponding path program 91 times [2022-01-31 20:57:50,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:57:50,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276619823] [2022-01-31 20:57:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:57:50,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:57:50,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:57:50,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:57:50,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:57:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:57:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:57:53,272 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 20:57:53,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:57:53,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276619823] [2022-01-31 20:57:53,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [276619823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:57:53,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:57:53,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 20:57:53,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814108319] [2022-01-31 20:57:53,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:57:53,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 20:57:53,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:57:53,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 20:57:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:57:53,275 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:15,482 INFO L93 Difference]: Finished difference Result 677 states and 865 transitions. [2022-01-31 20:58:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 20:58:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 20:58:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:15,492 INFO L225 Difference]: With dead ends: 677 [2022-01-31 20:58:15,492 INFO L226 Difference]: Without dead ends: 660 [2022-01-31 20:58:15,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 20:58:15,494 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2333 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2333 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:15,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2333 Valid, 47 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:58:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-31 20:58:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 208. [2022-01-31 20:58:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2022-01-31 20:58:15,747 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 205 [2022-01-31 20:58:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2022-01-31 20:58:15,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2022-01-31 20:58:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 20:58:15,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:15,748 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:15,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 20:58:15,748 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -463143163, now seen corresponding path program 92 times [2022-01-31 20:58:15,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032687868] [2022-01-31 20:58:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:15,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:15,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:15,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:15,754 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:18,153 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 20:58:18,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032687868] [2022-01-31 20:58:18,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032687868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:18,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:18,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 20:58:18,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433971397] [2022-01-31 20:58:18,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:18,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 20:58:18,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 20:58:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:58:18,156 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:58:40,855 INFO L93 Difference]: Finished difference Result 684 states and 874 transitions. [2022-01-31 20:58:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 20:58:40,855 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 20:58:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:58:40,856 INFO L225 Difference]: With dead ends: 684 [2022-01-31 20:58:40,856 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 20:58:40,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 20:58:40,857 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2528 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2528 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:58:40,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2528 Valid, 47 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:58:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 20:58:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 210. [2022-01-31 20:58:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2022-01-31 20:58:41,110 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 207 [2022-01-31 20:58:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:58:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2022-01-31 20:58:41,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:58:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2022-01-31 20:58:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 20:58:41,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:58:41,111 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:58:41,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 20:58:41,111 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:58:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:58:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash 981068067, now seen corresponding path program 93 times [2022-01-31 20:58:41,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:58:41,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531234387] [2022-01-31 20:58:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:58:41,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:58:41,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:58:41,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:58:41,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:58:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:43,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:58:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:58:43,549 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 20:58:43,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:58:43,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531234387] [2022-01-31 20:58:43,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531234387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:58:43,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:58:43,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 20:58:43,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237858461] [2022-01-31 20:58:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:58:43,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 20:58:43,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:58:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 20:58:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:58:43,552 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:06,707 INFO L93 Difference]: Finished difference Result 691 states and 883 transitions. [2022-01-31 20:59:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 20:59:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 20:59:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:06,708 INFO L225 Difference]: With dead ends: 691 [2022-01-31 20:59:06,708 INFO L226 Difference]: Without dead ends: 674 [2022-01-31 20:59:06,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 20:59:06,710 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:06,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2223 Valid, 52 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:59:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-31 20:59:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 212. [2022-01-31 20:59:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0241545893719808) internal successors, (212), 207 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2022-01-31 20:59:06,971 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 209 [2022-01-31 20:59:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:06,971 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2022-01-31 20:59:06,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:06,972 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2022-01-31 20:59:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 20:59:06,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:06,972 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:06,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 20:59:06,973 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1593623489, now seen corresponding path program 94 times [2022-01-31 20:59:06,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:06,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912273132] [2022-01-31 20:59:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:06,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:59:06,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:59:06,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:06,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:59:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:09,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:09,474 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 20:59:09,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:09,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912273132] [2022-01-31 20:59:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912273132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:09,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:09,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 20:59:09,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434423994] [2022-01-31 20:59:09,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:09,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 20:59:09,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:09,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 20:59:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:59:09,476 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:59:34,060 INFO L93 Difference]: Finished difference Result 698 states and 892 transitions. [2022-01-31 20:59:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 20:59:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 20:59:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:59:34,062 INFO L225 Difference]: With dead ends: 698 [2022-01-31 20:59:34,062 INFO L226 Difference]: Without dead ends: 681 [2022-01-31 20:59:34,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 20:59:34,064 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2915 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2915 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:59:34,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2915 Valid, 42 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:59:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-31 20:59:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 214. [2022-01-31 20:59:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0239234449760766) internal successors, (214), 209 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2022-01-31 20:59:34,347 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 211 [2022-01-31 20:59:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:59:34,347 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2022-01-31 20:59:34,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:59:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2022-01-31 20:59:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 20:59:34,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:59:34,348 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:59:34,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 20:59:34,348 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:59:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:59:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1848864479, now seen corresponding path program 95 times [2022-01-31 20:59:34,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:59:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972873743] [2022-01-31 20:59:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:59:34,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:59:34,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:59:34,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:59:34,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:59:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:36,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:59:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:59:36,952 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 20:59:36,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:59:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972873743] [2022-01-31 20:59:36,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [972873743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:59:36,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:59:36,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 20:59:36,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004683259] [2022-01-31 20:59:36,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:59:36,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 20:59:36,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:59:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 20:59:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:59:36,955 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:02,916 INFO L93 Difference]: Finished difference Result 705 states and 901 transitions. [2022-01-31 21:00:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 21:00:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 21:00:02,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:02,917 INFO L225 Difference]: With dead ends: 705 [2022-01-31 21:00:02,918 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 21:00:02,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 21:00:02,919 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2468 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:02,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2468 Valid, 47 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:00:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 21:00:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 216. [2022-01-31 21:00:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.0236966824644549) internal successors, (216), 211 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2022-01-31 21:00:03,215 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 213 [2022-01-31 21:00:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:03,215 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2022-01-31 21:00:03,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2022-01-31 21:00:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 21:00:03,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:03,216 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:03,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:00:03,217 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:03,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1972647299, now seen corresponding path program 96 times [2022-01-31 21:00:03,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:03,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584461845] [2022-01-31 21:00:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:03,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:00:03,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:00:03,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:03,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:05,877 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 21:00:05,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584461845] [2022-01-31 21:00:05,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584461845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:05,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:05,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 21:00:05,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166445010] [2022-01-31 21:00:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:05,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 21:00:05,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 21:00:05,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:00:05,881 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:00:32,358 INFO L93 Difference]: Finished difference Result 712 states and 910 transitions. [2022-01-31 21:00:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 21:00:32,358 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 21:00:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:00:32,359 INFO L225 Difference]: With dead ends: 712 [2022-01-31 21:00:32,359 INFO L226 Difference]: Without dead ends: 695 [2022-01-31 21:00:32,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 21:00:32,361 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2627 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:00:32,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 52 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:00:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-31 21:00:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 218. [2022-01-31 21:00:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0234741784037558) internal successors, (218), 213 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2022-01-31 21:00:32,645 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 215 [2022-01-31 21:00:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:00:32,645 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2022-01-31 21:00:32,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:00:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2022-01-31 21:00:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 21:00:32,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:00:32,646 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:00:32,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:00:32,646 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:00:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:00:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2046539419, now seen corresponding path program 97 times [2022-01-31 21:00:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:00:32,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900936033] [2022-01-31 21:00:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:00:32,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:00:32,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:00:32,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:00:32,653 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:00:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:35,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:00:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:00:35,319 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 21:00:35,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:00:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900936033] [2022-01-31 21:00:35,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900936033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:00:35,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:00:35,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 21:00:35,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497643539] [2022-01-31 21:00:35,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:00:35,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 21:00:35,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:00:35,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 21:00:35,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:00:35,328 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:02,231 INFO L93 Difference]: Finished difference Result 719 states and 919 transitions. [2022-01-31 21:01:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 21:01:02,231 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 21:01:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:02,232 INFO L225 Difference]: With dead ends: 719 [2022-01-31 21:01:02,232 INFO L226 Difference]: Without dead ends: 702 [2022-01-31 21:01:02,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 21:01:02,234 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2507 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2507 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:02,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2507 Valid, 57 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:01:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-31 21:01:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 220. [2022-01-31 21:01:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2022-01-31 21:01:02,529 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 217 [2022-01-31 21:01:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:02,529 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2022-01-31 21:01:02,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2022-01-31 21:01:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 21:01:02,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:02,530 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:02,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:01:02,530 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash -985590983, now seen corresponding path program 98 times [2022-01-31 21:01:02,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:02,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013268036] [2022-01-31 21:01:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:02,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:02,532 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:01:02,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:02,537 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:01:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:05,299 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 21:01:05,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013268036] [2022-01-31 21:01:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013268036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:05,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:05,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 21:01:05,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178421444] [2022-01-31 21:01:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:05,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 21:01:05,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 21:01:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:01:05,302 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:01:33,011 INFO L93 Difference]: Finished difference Result 726 states and 928 transitions. [2022-01-31 21:01:33,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 21:01:33,012 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 21:01:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:01:33,013 INFO L225 Difference]: With dead ends: 726 [2022-01-31 21:01:33,013 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 21:01:33,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 21:01:33,015 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2625 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2625 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:01:33,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2625 Valid, 42 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:01:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 21:01:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 222. [2022-01-31 21:01:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.023041474654378) internal successors, (222), 217 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2022-01-31 21:01:33,313 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 219 [2022-01-31 21:01:33,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:01:33,314 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2022-01-31 21:01:33,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:01:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2022-01-31 21:01:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 21:01:33,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:01:33,314 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:01:33,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 21:01:33,315 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:01:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:01:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1419886679, now seen corresponding path program 99 times [2022-01-31 21:01:33,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:01:33,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077581395] [2022-01-31 21:01:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:01:33,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 21:01:33,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 21:01:33,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:01:33,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:01:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:36,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:01:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:01:36,121 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 21:01:36,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:01:36,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077581395] [2022-01-31 21:01:36,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077581395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:01:36,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:01:36,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 21:01:36,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541143314] [2022-01-31 21:01:36,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:01:36,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 21:01:36,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:01:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 21:01:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:01:36,124 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)