/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-lopstr16/break-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:57:37,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:57:37,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:57:37,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:57:37,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:57:37,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:57:37,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:57:37,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:57:37,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:57:37,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:57:37,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:57:37,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:57:37,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:57:37,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:57:37,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:57:37,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:57:37,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:57:37,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:57:37,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:57:37,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:57:37,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 19:57:37,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:57:37,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:57:37,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:57:37,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:57:37,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:57:37,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:57:37,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:57:37,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:57:37,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:57:37,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:57:37,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:57:37,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:57:37,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:57:37,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:57:37,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:57:37,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:57:37,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:57:37,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:57:37,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:57:37,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:57:37,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:57:37,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:57:37,122 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:57:37,123 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:57:37,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:57:37,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:57:37,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:57:37,379 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:57:37,379 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:57:37,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/break-2.i [2022-01-31 19:57:37,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d84060514/382fa14a6c104ac08bbc7053899b01ab/FLAG08c30166f [2022-01-31 19:57:37,827 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:57:37,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/break-2.i [2022-01-31 19:57:37,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d84060514/382fa14a6c104ac08bbc7053899b01ab/FLAG08c30166f [2022-01-31 19:57:38,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d84060514/382fa14a6c104ac08bbc7053899b01ab [2022-01-31 19:57:38,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:57:38,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:57:38,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:57:38,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:57:38,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:57:38,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:57:38" (1/1) ... [2022-01-31 19:57:38,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa6177c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:38, skipping insertion in model container [2022-01-31 19:57:38,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:57:38" (1/1) ... [2022-01-31 19:57:38,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:57:38,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:57:38,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/break-2.i[800,813] [2022-01-31 19:57:38,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:57:43,230 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:57:43,239 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/break-2.i[800,813] [2022-01-31 19:57:43,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:57:43,255 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:57:43,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43 WrapperNode [2022-01-31 19:57:43,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:57:43,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:57:43,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:57:43,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:57:43,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:57:43,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:57:43,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:57:43,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:57:43,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (1/1) ... [2022-01-31 19:57:43,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:57:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:57:43,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 19:57:43,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 19:57:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:57:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:57:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:57:43,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:57:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:57:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:57:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:57:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 19:57:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 19:57:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:57:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:57:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:57:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:57:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:57:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:57:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:57:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:57:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:57:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:57:43,448 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:57:43,449 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:57:43,603 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:57:43,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:57:43,607 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 19:57:43,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:57:43 BoogieIcfgContainer [2022-01-31 19:57:43,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:57:43,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:57:43,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:57:43,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:57:43,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:57:38" (1/3) ... [2022-01-31 19:57:43,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1635b2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:57:43, skipping insertion in model container [2022-01-31 19:57:43,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:57:43" (2/3) ... [2022-01-31 19:57:43,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1635b2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:57:43, skipping insertion in model container [2022-01-31 19:57:43,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:57:43" (3/3) ... [2022-01-31 19:57:43,615 INFO L111 eAbstractionObserver]: Analyzing ICFG break-2.i [2022-01-31 19:57:43,618 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:57:43,619 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:57:43,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:57:43,669 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 19:57:43,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:57:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:57:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 19:57:43,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:43,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:43,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1774353919, now seen corresponding path program 1 times [2022-01-31 19:57:43,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:43,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800854754] [2022-01-31 19:57:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:43,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:43,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:43,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:43,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800854754] [2022-01-31 19:57:43,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [800854754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:43,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:43,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:57:43,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265761989] [2022-01-31 19:57:43,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:43,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:57:43,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:57:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:57:43,967 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:44,064 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-01-31 19:57:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:57:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 19:57:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:44,072 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:57:44,072 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 19:57:44,075 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 19:57:44,079 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:44,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 19:57:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2022-01-31 19:57:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-31 19:57:44,116 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2022-01-31 19:57:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,116 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-31 19:57:44,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-31 19:57:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 19:57:44,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:44,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:57:44,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash -216690582, now seen corresponding path program 1 times [2022-01-31 19:57:44,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248847181] [2022-01-31 19:57:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:44,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:44,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248847181] [2022-01-31 19:57:44,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248847181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:44,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:44,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:57:44,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210355713] [2022-01-31 19:57:44,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:44,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:57:44,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:44,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:57:44,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:57:44,220 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:44,328 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-31 19:57:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:57:44,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 19:57:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:44,330 INFO L225 Difference]: With dead ends: 41 [2022-01-31 19:57:44,330 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 19:57:44,330 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 19:57:44,331 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:44,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 19:57:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-31 19:57:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:57:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 19:57:44,343 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-01-31 19:57:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,344 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 19:57:44,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 19:57:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 19:57:44,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,345 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 19:57:44,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:57:44,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2014988331, now seen corresponding path program 1 times [2022-01-31 19:57:44,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211494347] [2022-01-31 19:57:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:44,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:44,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,384 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:44,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211494347] [2022-01-31 19:57:44,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [211494347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:44,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:44,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:57:44,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437054111] [2022-01-31 19:57:44,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:44,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:57:44,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:57:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:57:44,467 INFO L87 Difference]: Start difference. First operand 25 states and 28 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 19:57:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:44,553 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-01-31 19:57:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:57:44,554 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 19:57:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:44,554 INFO L225 Difference]: With dead ends: 51 [2022-01-31 19:57:44,555 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 19:57:44,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:57:44,556 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:44,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 19:57:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-01-31 19:57:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:57:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 19:57:44,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 17 [2022-01-31 19:57:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,564 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 19:57:44,564 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 19:57:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 19:57:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 19:57:44,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:44,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:57:44,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 318821514, now seen corresponding path program 2 times [2022-01-31 19:57:44,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570350865] [2022-01-31 19:57:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:44,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:44,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:44,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:44,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570350865] [2022-01-31 19:57:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [570350865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:44,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:44,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:57:44,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616268111] [2022-01-31 19:57:44,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:44,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:57:44,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:57:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:57:44,626 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:44,688 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-01-31 19:57:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:57:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 19:57:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:44,689 INFO L225 Difference]: With dead ends: 56 [2022-01-31 19:57:44,689 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 19:57:44,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:57:44,691 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:44,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:57:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 19:57:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-01-31 19:57:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:57:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-01-31 19:57:44,700 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2022-01-31 19:57:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,700 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-01-31 19:57:44,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-01-31 19:57:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 19:57:44,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,701 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:44,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:57:44,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2000473458, now seen corresponding path program 1 times [2022-01-31 19:57:44,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148332166] [2022-01-31 19:57:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:44,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:44,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:44,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:44,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148332166] [2022-01-31 19:57:44,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148332166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:44,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:44,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:57:44,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152012812] [2022-01-31 19:57:44,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:44,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:57:44,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:44,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:57:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:57:44,764 INFO L87 Difference]: Start difference. First operand 33 states and 36 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 19:57:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:44,847 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-01-31 19:57:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:57:44,847 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 21 [2022-01-31 19:57:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:44,849 INFO L225 Difference]: With dead ends: 64 [2022-01-31 19:57:44,850 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 19:57:44,850 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 19:57:44,851 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:44,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 19:57:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-01-31 19:57:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 19:57:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 19:57:44,865 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 21 [2022-01-31 19:57:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,865 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 19:57:44,865 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 19:57:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 19:57:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 19:57:44,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,866 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:57:44,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1561924413, now seen corresponding path program 2 times [2022-01-31 19:57:44,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492949013] [2022-01-31 19:57:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:44,870 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:44,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:44,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492949013] [2022-01-31 19:57:44,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492949013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:44,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:44,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 19:57:44,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557392523] [2022-01-31 19:57:44,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:44,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 19:57:44,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 19:57:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 19:57:44,965 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:45,078 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-01-31 19:57:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:57:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 19:57:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:45,081 INFO L225 Difference]: With dead ends: 77 [2022-01-31 19:57:45,081 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 19:57:45,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:57:45,088 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:45,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 41 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 19:57:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-01-31 19:57:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:57:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-01-31 19:57:45,097 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 24 [2022-01-31 19:57:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:45,097 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-01-31 19:57:45,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-01-31 19:57:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 19:57:45,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:45,099 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:45,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:57:45,105 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2037839250, now seen corresponding path program 3 times [2022-01-31 19:57:45,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630357336] [2022-01-31 19:57:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:45,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:45,111 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:45,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:45,113 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:45,223 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:45,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630357336] [2022-01-31 19:57:45,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [630357336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:45,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:45,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:57:45,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187673076] [2022-01-31 19:57:45,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:45,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:57:45,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:57:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:57:45,227 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 19:57:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:45,346 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-01-31 19:57:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 19:57:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 19:57:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:45,348 INFO L225 Difference]: With dead ends: 90 [2022-01-31 19:57:45,348 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:57:45,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:57:45,349 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:45,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 33 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:57:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2022-01-31 19:57:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:57:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-31 19:57:45,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 27 [2022-01-31 19:57:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-31 19:57:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 19:57:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-31 19:57:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:57:45,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:45,360 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:45,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:57:45,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1965263075, now seen corresponding path program 4 times [2022-01-31 19:57:45,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:45,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810572735] [2022-01-31 19:57:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:45,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:45,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:45,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:45,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:45,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:45,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810572735] [2022-01-31 19:57:45,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810572735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:45,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:45,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 19:57:45,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763265209] [2022-01-31 19:57:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:45,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 19:57:45,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 19:57:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:57:45,454 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:45,566 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2022-01-31 19:57:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 19:57:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 19:57:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:45,568 INFO L225 Difference]: With dead ends: 103 [2022-01-31 19:57:45,568 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 19:57:45,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:57:45,569 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:45,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 40 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 19:57:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-01-31 19:57:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:57:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-01-31 19:57:45,653 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 30 [2022-01-31 19:57:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-01-31 19:57:45,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-01-31 19:57:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 19:57:45,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:45,655 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:45,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:57:45,657 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash 29719118, now seen corresponding path program 5 times [2022-01-31 19:57:45,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741298818] [2022-01-31 19:57:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:45,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:45,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:45,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:45,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:45,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:45,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741298818] [2022-01-31 19:57:45,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741298818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:45,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:45,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:57:45,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655029854] [2022-01-31 19:57:45,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:45,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:57:45,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:45,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:57:45,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:57:45,780 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 19:57:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:45,891 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-01-31 19:57:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:57:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 33 [2022-01-31 19:57:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:45,893 INFO L225 Difference]: With dead ends: 116 [2022-01-31 19:57:45,893 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:57:45,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:57:45,894 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:45,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 47 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:57:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2022-01-31 19:57:45,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:57:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-01-31 19:57:45,905 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 33 [2022-01-31 19:57:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:45,905 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-01-31 19:57:45,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 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 19:57:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-01-31 19:57:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 19:57:45,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:45,906 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:45,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:57:45,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1824355069, now seen corresponding path program 6 times [2022-01-31 19:57:45,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:45,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912767012] [2022-01-31 19:57:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:45,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:45,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:45,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:45,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:46,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912767012] [2022-01-31 19:57:46,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912767012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:46,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:46,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 19:57:46,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749535090] [2022-01-31 19:57:46,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:46,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 19:57:46,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:46,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 19:57:46,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:57:46,006 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:46,131 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2022-01-31 19:57:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:57:46,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 19:57:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:46,133 INFO L225 Difference]: With dead ends: 129 [2022-01-31 19:57:46,133 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 19:57:46,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:57:46,134 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 49 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 19:57:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2022-01-31 19:57:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:57:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-01-31 19:57:46,144 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 36 [2022-01-31 19:57:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:46,145 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-01-31 19:57:46,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-01-31 19:57:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 19:57:46,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:46,146 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:46,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:57:46,146 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1025933870, now seen corresponding path program 7 times [2022-01-31 19:57:46,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:46,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120957245] [2022-01-31 19:57:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:46,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:46,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:46,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:46,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:46,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120957245] [2022-01-31 19:57:46,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [120957245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:46,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:46,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:57:46,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813898375] [2022-01-31 19:57:46,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:46,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:57:46,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:57:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:57:46,248 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 19:57:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:46,381 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2022-01-31 19:57:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:57:46,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 19:57:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:46,383 INFO L225 Difference]: With dead ends: 142 [2022-01-31 19:57:46,383 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 19:57:46,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:57:46,384 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:46,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 19:57:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-01-31 19:57:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:57:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-01-31 19:57:46,395 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 39 [2022-01-31 19:57:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:46,396 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-01-31 19:57:46,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 19:57:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-01-31 19:57:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:57:46,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:46,397 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:46,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:57:46,397 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1814693597, now seen corresponding path program 8 times [2022-01-31 19:57:46,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669503536] [2022-01-31 19:57:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:46,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:46,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:46,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:46,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:46,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669503536] [2022-01-31 19:57:46,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [669503536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:46,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:46,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 19:57:46,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931938514] [2022-01-31 19:57:46,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:46,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 19:57:46,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 19:57:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:57:46,506 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:46,664 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-01-31 19:57:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:57:46,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 19:57:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:46,666 INFO L225 Difference]: With dead ends: 155 [2022-01-31 19:57:46,666 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:57:46,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:57:46,667 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:46,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 63 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:57:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-01-31 19:57:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 19:57:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-01-31 19:57:46,678 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 42 [2022-01-31 19:57:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:46,678 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-01-31 19:57:46,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-01-31 19:57:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 19:57:46,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:46,679 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:46,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:57:46,680 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1088037390, now seen corresponding path program 9 times [2022-01-31 19:57:46,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:46,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652834242] [2022-01-31 19:57:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:46,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:46,683 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:46,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:46,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:46,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652834242] [2022-01-31 19:57:46,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [652834242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:46,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:46,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:57:46,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664129872] [2022-01-31 19:57:46,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:46,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:57:46,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:57:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:57:46,838 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 19:57:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:46,995 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2022-01-31 19:57:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:57:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 45 [2022-01-31 19:57:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:47,002 INFO L225 Difference]: With dead ends: 168 [2022-01-31 19:57:47,002 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:57:47,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:57:47,004 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 83 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:47,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 55 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:57:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2022-01-31 19:57:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 19:57:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-01-31 19:57:47,020 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 45 [2022-01-31 19:57:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:47,021 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-01-31 19:57:47,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 19:57:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-01-31 19:57:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 19:57:47,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:47,024 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:57:47,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:47,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1475333443, now seen corresponding path program 10 times [2022-01-31 19:57:47,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:47,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620576691] [2022-01-31 19:57:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:47,032 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:47,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:47,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:47,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:47,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620576691] [2022-01-31 19:57:47,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620576691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:47,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:47,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:57:47,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116590664] [2022-01-31 19:57:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:47,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:57:47,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:57:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:57:47,191 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:47,366 INFO L93 Difference]: Finished difference Result 181 states and 208 transitions. [2022-01-31 19:57:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:57:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 19:57:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:47,368 INFO L225 Difference]: With dead ends: 181 [2022-01-31 19:57:47,368 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 19:57:47,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:57:47,369 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:47,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 62 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:57:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 19:57:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2022-01-31 19:57:47,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 19:57:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2022-01-31 19:57:47,382 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 48 [2022-01-31 19:57:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:47,383 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2022-01-31 19:57:47,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2022-01-31 19:57:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 19:57:47,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:47,384 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:47,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:57:47,384 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1165075986, now seen corresponding path program 11 times [2022-01-31 19:57:47,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3602055] [2022-01-31 19:57:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:47,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:47,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:47,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:47,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:47,529 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3602055] [2022-01-31 19:57:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [3602055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:47,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:47,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:57:47,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722924636] [2022-01-31 19:57:47,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:47,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:57:47,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:47,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:57:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:57:47,531 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 19:57:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:47,738 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2022-01-31 19:57:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:57:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 19:57:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:47,740 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:57:47,740 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 19:57:47,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:57:47,743 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 97 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:47,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 69 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 19:57:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-01-31 19:57:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 19:57:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-01-31 19:57:47,758 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 51 [2022-01-31 19:57:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:47,759 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-01-31 19:57:47,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 19:57:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-01-31 19:57:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:57:47,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:47,762 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:47,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:57:47,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 723650915, now seen corresponding path program 12 times [2022-01-31 19:57:47,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:47,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734232709] [2022-01-31 19:57:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:47,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:47,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:47,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:47,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:47,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734232709] [2022-01-31 19:57:47,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734232709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:47,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:47,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 19:57:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245533377] [2022-01-31 19:57:47,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:47,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 19:57:47,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 19:57:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:57:47,955 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:48,158 INFO L93 Difference]: Finished difference Result 207 states and 238 transitions. [2022-01-31 19:57:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:57:48,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 19:57:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:48,160 INFO L225 Difference]: With dead ends: 207 [2022-01-31 19:57:48,160 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:57:48,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:57:48,161 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 101 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:48,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 66 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:57:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2022-01-31 19:57:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 19:57:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2022-01-31 19:57:48,176 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 54 [2022-01-31 19:57:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:48,177 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2022-01-31 19:57:48,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2022-01-31 19:57:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 19:57:48,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:48,177 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:48,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:57:48,178 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash -579786290, now seen corresponding path program 13 times [2022-01-31 19:57:48,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:48,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080543026] [2022-01-31 19:57:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:48,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:48,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:48,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:48,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:48,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:48,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:48,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080543026] [2022-01-31 19:57:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080543026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:48,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:48,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:57:48,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901652105] [2022-01-31 19:57:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:48,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:57:48,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:57:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:57:48,357 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 19:57:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:48,591 INFO L93 Difference]: Finished difference Result 220 states and 253 transitions. [2022-01-31 19:57:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:57:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 57 [2022-01-31 19:57:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:48,593 INFO L225 Difference]: With dead ends: 220 [2022-01-31 19:57:48,593 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 19:57:48,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:57:48,594 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 105 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:48,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 68 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 19:57:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2022-01-31 19:57:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 19:57:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2022-01-31 19:57:48,608 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 57 [2022-01-31 19:57:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:48,608 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2022-01-31 19:57:48,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 19:57:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2022-01-31 19:57:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 19:57:48,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:48,609 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:48,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:57:48,610 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash -478237309, now seen corresponding path program 14 times [2022-01-31 19:57:48,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770125705] [2022-01-31 19:57:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:48,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:48,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:48,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:48,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:48,798 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:48,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770125705] [2022-01-31 19:57:48,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [770125705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:48,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:48,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:57:48,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011847749] [2022-01-31 19:57:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:48,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:57:48,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:48,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:57:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:57:48,800 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:49,016 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2022-01-31 19:57:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:57:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 19:57:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:49,017 INFO L225 Difference]: With dead ends: 233 [2022-01-31 19:57:49,018 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:57:49,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:57:49,018 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:49,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 55 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:57:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2022-01-31 19:57:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 19:57:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2022-01-31 19:57:49,031 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 60 [2022-01-31 19:57:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:49,031 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2022-01-31 19:57:49,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:49,031 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2022-01-31 19:57:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 19:57:49,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:49,032 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:49,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:57:49,032 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1110479278, now seen corresponding path program 15 times [2022-01-31 19:57:49,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250401238] [2022-01-31 19:57:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:49,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:49,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:49,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:49,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:49,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:49,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250401238] [2022-01-31 19:57:49,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [250401238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:49,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:49,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:57:49,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355403793] [2022-01-31 19:57:49,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:49,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:57:49,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:57:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:57:49,236 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 19:57:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:49,477 INFO L93 Difference]: Finished difference Result 246 states and 283 transitions. [2022-01-31 19:57:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:57:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 19:57:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:49,479 INFO L225 Difference]: With dead ends: 246 [2022-01-31 19:57:49,479 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:57:49,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:57:49,480 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 137 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 82 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:57:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2022-01-31 19:57:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 19:57:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2022-01-31 19:57:49,494 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 63 [2022-01-31 19:57:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:49,494 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2022-01-31 19:57:49,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 19:57:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2022-01-31 19:57:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:57:49,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:49,495 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:49,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:57:49,495 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 26720675, now seen corresponding path program 16 times [2022-01-31 19:57:49,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670606923] [2022-01-31 19:57:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:49,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:49,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:49,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:49,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:49,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:49,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670606923] [2022-01-31 19:57:49,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [670606923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:49,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:49,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:57:49,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741960439] [2022-01-31 19:57:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:49,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:57:49,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:57:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:57:49,717 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:49,957 INFO L93 Difference]: Finished difference Result 259 states and 298 transitions. [2022-01-31 19:57:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:57:49,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 19:57:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:49,958 INFO L225 Difference]: With dead ends: 259 [2022-01-31 19:57:49,959 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 19:57:49,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:57:49,960 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 186 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:49,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 64 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 19:57:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-01-31 19:57:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 19:57:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2022-01-31 19:57:49,973 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 66 [2022-01-31 19:57:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:49,973 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2022-01-31 19:57:49,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2022-01-31 19:57:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 19:57:49,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:49,974 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:49,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:57:49,974 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash -956657266, now seen corresponding path program 17 times [2022-01-31 19:57:49,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:49,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839841576] [2022-01-31 19:57:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:49,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:49,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:49,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:49,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:50,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:50,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:50,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839841576] [2022-01-31 19:57:50,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839841576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:50,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:50,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:57:50,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925576787] [2022-01-31 19:57:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:50,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:57:50,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:50,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:57:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:57:50,191 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 19:57:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:50,467 INFO L93 Difference]: Finished difference Result 272 states and 313 transitions. [2022-01-31 19:57:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:57:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 69 [2022-01-31 19:57:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:50,470 INFO L225 Difference]: With dead ends: 272 [2022-01-31 19:57:50,470 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 19:57:50,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:57:50,471 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 193 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:50,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 71 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 19:57:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2022-01-31 19:57:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 19:57:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2022-01-31 19:57:50,488 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 69 [2022-01-31 19:57:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:50,488 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2022-01-31 19:57:50,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 19:57:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2022-01-31 19:57:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 19:57:50,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:50,489 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:50,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:57:50,489 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash -796971581, now seen corresponding path program 18 times [2022-01-31 19:57:50,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:50,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25264540] [2022-01-31 19:57:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:50,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:50,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:50,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:50,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:50,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:50,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:50,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25264540] [2022-01-31 19:57:50,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [25264540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:50,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:50,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:57:50,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78338828] [2022-01-31 19:57:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:50,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:57:50,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:57:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:57:50,730 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:51,008 INFO L93 Difference]: Finished difference Result 285 states and 328 transitions. [2022-01-31 19:57:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:57:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 19:57:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:51,011 INFO L225 Difference]: With dead ends: 285 [2022-01-31 19:57:51,011 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:57:51,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:57:51,012 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:51,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 68 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:57:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2022-01-31 19:57:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 19:57:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-01-31 19:57:51,029 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 72 [2022-01-31 19:57:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:51,029 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-01-31 19:57:51,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-01-31 19:57:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 19:57:51,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:51,029 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:51,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:57:51,030 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:51,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1870473582, now seen corresponding path program 19 times [2022-01-31 19:57:51,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:51,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397875642] [2022-01-31 19:57:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:51,032 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:51,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:51,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:51,033 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,264 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 19:57:51,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397875642] [2022-01-31 19:57:51,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397875642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:51,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:51,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:57:51,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824226600] [2022-01-31 19:57:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:51,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:57:51,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:57:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:57:51,266 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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 19:57:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:51,606 INFO L93 Difference]: Finished difference Result 298 states and 343 transitions. [2022-01-31 19:57:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:57:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 19:57:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:51,607 INFO L225 Difference]: With dead ends: 298 [2022-01-31 19:57:51,608 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 19:57:51,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:57:51,612 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 153 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:51,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 90 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 19:57:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-01-31 19:57:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.0188679245283019) internal successors, (162), 159 states have internal predecessors, (162), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 19:57:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2022-01-31 19:57:51,634 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 75 [2022-01-31 19:57:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:51,635 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2022-01-31 19:57:51,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 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 19:57:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2022-01-31 19:57:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:57:51,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:51,635 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:51,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:57:51,636 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:51,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2050553373, now seen corresponding path program 20 times [2022-01-31 19:57:51,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027822483] [2022-01-31 19:57:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:51,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:51,638 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:51,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:51,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:51,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027822483] [2022-01-31 19:57:51,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027822483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:51,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:51,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:57:51,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153423624] [2022-01-31 19:57:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:51,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:57:51,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:57:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:57:51,953 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:52,253 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2022-01-31 19:57:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:57:52,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 19:57:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:52,255 INFO L225 Difference]: With dead ends: 311 [2022-01-31 19:57:52,255 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 19:57:52,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:57:52,256 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 163 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:52,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 92 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:57:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 19:57:52,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-01-31 19:57:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 19:57:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2022-01-31 19:57:52,275 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 78 [2022-01-31 19:57:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:52,275 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2022-01-31 19:57:52,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:52,275 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2022-01-31 19:57:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 19:57:52,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:52,276 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:57:52,276 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1155946830, now seen corresponding path program 21 times [2022-01-31 19:57:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053497364] [2022-01-31 19:57:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:52,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:52,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:52,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:52,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:52,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:52,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:52,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053497364] [2022-01-31 19:57:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053497364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:52,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:52,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:57:52,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113030844] [2022-01-31 19:57:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:52,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:57:52,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:57:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:57:52,570 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 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 19:57:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:52,885 INFO L93 Difference]: Finished difference Result 324 states and 373 transitions. [2022-01-31 19:57:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:57:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 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 81 [2022-01-31 19:57:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:52,887 INFO L225 Difference]: With dead ends: 324 [2022-01-31 19:57:52,887 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 19:57:52,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:57:52,888 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 224 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:52,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 84 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 19:57:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2022-01-31 19:57:52,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 25 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:57:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2022-01-31 19:57:52,909 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 81 [2022-01-31 19:57:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:52,909 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2022-01-31 19:57:52,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 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 19:57:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2022-01-31 19:57:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:57:52,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:52,910 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:52,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:57:52,910 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1635864067, now seen corresponding path program 22 times [2022-01-31 19:57:52,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:52,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597962443] [2022-01-31 19:57:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:52,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:52,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:52,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:52,914 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:53,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:53,243 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597962443] [2022-01-31 19:57:53,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597962443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:53,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:53,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:57:53,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731682577] [2022-01-31 19:57:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:53,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:57:53,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:57:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:57:53,245 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:53,589 INFO L93 Difference]: Finished difference Result 337 states and 388 transitions. [2022-01-31 19:57:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:57:53,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 19:57:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:53,591 INFO L225 Difference]: With dead ends: 337 [2022-01-31 19:57:53,591 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 19:57:53,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:57:53,592 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 210 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:53,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 86 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 19:57:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2022-01-31 19:57:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 19:57:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 234 transitions. [2022-01-31 19:57:53,613 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 234 transitions. Word has length 84 [2022-01-31 19:57:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:53,613 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 234 transitions. [2022-01-31 19:57:53,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 234 transitions. [2022-01-31 19:57:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 19:57:53,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:53,614 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:53,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:57:53,614 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash 904143150, now seen corresponding path program 23 times [2022-01-31 19:57:53,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436960753] [2022-01-31 19:57:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:53,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:53,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:53,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:53,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:53,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:53,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436960753] [2022-01-31 19:57:53,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436960753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:53,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:53,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:57:53,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918703563] [2022-01-31 19:57:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:53,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:57:53,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:57:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:57:53,944 INFO L87 Difference]: Start difference. First operand 209 states and 234 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 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 19:57:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:54,308 INFO L93 Difference]: Finished difference Result 350 states and 403 transitions. [2022-01-31 19:57:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:57:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 19:57:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:54,310 INFO L225 Difference]: With dead ends: 350 [2022-01-31 19:57:54,310 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:57:54,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:57:54,312 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 241 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:54,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 88 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:57:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2022-01-31 19:57:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 19:57:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2022-01-31 19:57:54,339 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 87 [2022-01-31 19:57:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:54,339 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2022-01-31 19:57:54,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 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 19:57:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2022-01-31 19:57:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:57:54,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:54,340 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:54,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:57:54,341 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash -834667997, now seen corresponding path program 24 times [2022-01-31 19:57:54,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152215031] [2022-01-31 19:57:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:54,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:54,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:54,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:54,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:54,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152215031] [2022-01-31 19:57:54,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [152215031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:54,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:54,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:57:54,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691098812] [2022-01-31 19:57:54,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:54,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:57:54,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:57:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:57:54,684 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:55,093 INFO L93 Difference]: Finished difference Result 363 states and 418 transitions. [2022-01-31 19:57:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:57:55,093 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 19:57:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:55,094 INFO L225 Difference]: With dead ends: 363 [2022-01-31 19:57:55,094 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:57:55,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:57:55,096 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 266 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:55,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 90 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:57:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2022-01-31 19:57:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 19:57:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2022-01-31 19:57:55,126 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 90 [2022-01-31 19:57:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:55,127 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2022-01-31 19:57:55,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 28 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2022-01-31 19:57:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 19:57:55,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:55,128 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:55,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:57:55,128 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:55,128 INFO L85 PathProgramCache]: Analyzing trace with hash -156991218, now seen corresponding path program 25 times [2022-01-31 19:57:55,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:55,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355738958] [2022-01-31 19:57:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:55,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:55,133 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:55,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:55,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:55,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:55,525 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355738958] [2022-01-31 19:57:55,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1355738958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:55,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:55,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:57:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079645265] [2022-01-31 19:57:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:55,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:57:55,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:57:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:57:55,526 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 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 19:57:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:55,913 INFO L93 Difference]: Finished difference Result 376 states and 433 transitions. [2022-01-31 19:57:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:57:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 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 93 [2022-01-31 19:57:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:55,920 INFO L225 Difference]: With dead ends: 376 [2022-01-31 19:57:55,920 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 19:57:55,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:57:55,922 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 240 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:55,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 107 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 19:57:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2022-01-31 19:57:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 201 states have (on average 1.0149253731343284) internal successors, (204), 201 states have internal predecessors, (204), 29 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 19:57:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2022-01-31 19:57:55,948 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 93 [2022-01-31 19:57:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2022-01-31 19:57:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 29 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 19:57:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2022-01-31 19:57:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 19:57:55,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:55,950 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:55,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:57:55,950 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2129326525, now seen corresponding path program 26 times [2022-01-31 19:57:55,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:55,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258535882] [2022-01-31 19:57:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:55,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:55,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:55,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:55,955 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:56,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258535882] [2022-01-31 19:57:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258535882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:56,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:56,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:57:56,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694664376] [2022-01-31 19:57:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:56,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:57:56,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:57:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:57:56,358 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:56,734 INFO L93 Difference]: Finished difference Result 389 states and 448 transitions. [2022-01-31 19:57:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:57:56,734 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 19:57:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:56,736 INFO L225 Difference]: With dead ends: 389 [2022-01-31 19:57:56,736 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 19:57:56,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:57:56,737 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 226 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:56,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 109 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 19:57:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2022-01-31 19:57:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 19:57:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 270 transitions. [2022-01-31 19:57:56,762 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 270 transitions. Word has length 96 [2022-01-31 19:57:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:56,762 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 270 transitions. [2022-01-31 19:57:56,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 270 transitions. [2022-01-31 19:57:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 19:57:56,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:56,763 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:56,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:57:56,764 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash -522880786, now seen corresponding path program 27 times [2022-01-31 19:57:56,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:56,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305117476] [2022-01-31 19:57:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:56,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:56,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:56,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:56,768 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:57,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:57,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305117476] [2022-01-31 19:57:57,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305117476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:57,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:57,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:57:57,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709039413] [2022-01-31 19:57:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:57,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:57:57,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:57:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:57:57,192 INFO L87 Difference]: Start difference. First operand 241 states and 270 transitions. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 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 19:57:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:57,560 INFO L93 Difference]: Finished difference Result 402 states and 463 transitions. [2022-01-31 19:57:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:57:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 19:57:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:57,561 INFO L225 Difference]: With dead ends: 402 [2022-01-31 19:57:57,561 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 19:57:57,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:57:57,563 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 221 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:57,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 116 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 19:57:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2022-01-31 19:57:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 31 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 19:57:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2022-01-31 19:57:57,600 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 99 [2022-01-31 19:57:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2022-01-31 19:57:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 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 19:57:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2022-01-31 19:57:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:57:57,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:57,602 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:57,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:57:57,602 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1718449565, now seen corresponding path program 28 times [2022-01-31 19:57:57,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:57,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458061082] [2022-01-31 19:57:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:57,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:57,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:57,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:57,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:58,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:58,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458061082] [2022-01-31 19:57:58,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [458061082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:58,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:58,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:57:58,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414744494] [2022-01-31 19:57:58,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:58,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:57:58,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:57:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:57:58,039 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:58,469 INFO L93 Difference]: Finished difference Result 415 states and 478 transitions. [2022-01-31 19:57:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:57:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 19:57:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:58,471 INFO L225 Difference]: With dead ends: 415 [2022-01-31 19:57:58,471 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 19:57:58,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:58,472 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 351 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:58,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 88 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 19:57:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2022-01-31 19:57:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:57:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2022-01-31 19:57:58,513 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 102 [2022-01-31 19:57:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:58,513 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2022-01-31 19:57:58,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 32 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2022-01-31 19:57:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 19:57:58,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:58,514 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:58,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:57:58,514 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -744159026, now seen corresponding path program 29 times [2022-01-31 19:57:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:58,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729997419] [2022-01-31 19:57:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:58,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:58,517 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:58,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:58,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:58,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729997419] [2022-01-31 19:57:58,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729997419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:58,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:58,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:58,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962281434] [2022-01-31 19:57:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:58,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:58,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:58,994 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 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 19:57:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:59,456 INFO L93 Difference]: Finished difference Result 428 states and 493 transitions. [2022-01-31 19:57:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:57:59,457 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 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 105 [2022-01-31 19:57:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:59,458 INFO L225 Difference]: With dead ends: 428 [2022-01-31 19:57:59,458 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 19:57:59,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:57:59,461 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 316 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:59,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 100 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 19:57:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2022-01-31 19:57:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 229 states have (on average 1.0131004366812226) internal successors, (232), 229 states have internal predecessors, (232), 33 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 19:57:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-01-31 19:57:59,504 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 105 [2022-01-31 19:57:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-01-31 19:57:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9705882352941178) internal successors, (101), 33 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 19:57:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-01-31 19:57:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 19:57:59,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:59,508 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:59,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:57:59,508 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1043698045, now seen corresponding path program 30 times [2022-01-31 19:57:59,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:59,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678027526] [2022-01-31 19:57:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:59,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:59,511 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:57:59,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:59,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:00,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:00,035 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:00,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678027526] [2022-01-31 19:58:00,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [678027526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:00,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:00,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:58:00,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164180105] [2022-01-31 19:58:00,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:00,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:58:00,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:58:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:58:00,037 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 34 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:00,489 INFO L93 Difference]: Finished difference Result 441 states and 508 transitions. [2022-01-31 19:58:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:58:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 34 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 19:58:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:00,491 INFO L225 Difference]: With dead ends: 441 [2022-01-31 19:58:00,491 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 19:58:00,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:58:00,492 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 305 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:00,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 102 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 19:58:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2022-01-31 19:58:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 34 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 19:58:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 306 transitions. [2022-01-31 19:58:00,531 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 306 transitions. Word has length 108 [2022-01-31 19:58:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:00,532 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 306 transitions. [2022-01-31 19:58:00,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 34 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 306 transitions. [2022-01-31 19:58:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 19:58:00,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:00,533 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:00,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:58:00,533 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 331428014, now seen corresponding path program 31 times [2022-01-31 19:58:00,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:00,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650687856] [2022-01-31 19:58:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:00,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:00,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:00,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:00,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:01,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:01,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650687856] [2022-01-31 19:58:01,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650687856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:01,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:01,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:58:01,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375041749] [2022-01-31 19:58:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:01,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:58:01,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:58:01,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:58:01,062 INFO L87 Difference]: Start difference. First operand 273 states and 306 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 35 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 19:58:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:01,510 INFO L93 Difference]: Finished difference Result 454 states and 523 transitions. [2022-01-31 19:58:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:58:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 35 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 19:58:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:01,511 INFO L225 Difference]: With dead ends: 454 [2022-01-31 19:58:01,512 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 19:58:01,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:58:01,513 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 378 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:01,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 94 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:58:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 19:58:01,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2022-01-31 19:58:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 35 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 19:58:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2022-01-31 19:58:01,563 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 111 [2022-01-31 19:58:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:01,563 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2022-01-31 19:58:01,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 35 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 19:58:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2022-01-31 19:58:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:58:01,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:01,564 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:01,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:58:01,565 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1313782435, now seen corresponding path program 32 times [2022-01-31 19:58:01,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:01,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150500637] [2022-01-31 19:58:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:01,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:01,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:01,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:01,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:02,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:02,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150500637] [2022-01-31 19:58:02,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150500637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:02,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:02,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:58:02,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779475135] [2022-01-31 19:58:02,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:02,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:58:02,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:58:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:58:02,067 INFO L87 Difference]: Start difference. First operand 281 states and 315 transitions. Second operand has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:02,577 INFO L93 Difference]: Finished difference Result 467 states and 538 transitions. [2022-01-31 19:58:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:58:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-01-31 19:58:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:02,580 INFO L225 Difference]: With dead ends: 467 [2022-01-31 19:58:02,580 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 19:58:02,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:58:02,581 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 343 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:02,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 126 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:02,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 19:58:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2022-01-31 19:58:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 36 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 19:58:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2022-01-31 19:58:02,623 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 114 [2022-01-31 19:58:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:02,623 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2022-01-31 19:58:02,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2022-01-31 19:58:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 19:58:02,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:02,624 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:02,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:58:02,624 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 727183502, now seen corresponding path program 33 times [2022-01-31 19:58:02,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:02,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100123522] [2022-01-31 19:58:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:02,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:02,627 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:02,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:02,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:03,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:03,143 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100123522] [2022-01-31 19:58:03,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100123522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:03,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:03,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:58:03,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107977780] [2022-01-31 19:58:03,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:03,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:58:03,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:03,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:58:03,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:58:03,145 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 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 19:58:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:03,559 INFO L93 Difference]: Finished difference Result 480 states and 553 transitions. [2022-01-31 19:58:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:58:03,559 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 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 117 [2022-01-31 19:58:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:03,560 INFO L225 Difference]: With dead ends: 480 [2022-01-31 19:58:03,560 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 19:58:03,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:58:03,562 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 380 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:03,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 113 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:58:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 19:58:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2022-01-31 19:58:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 257 states have (on average 1.0116731517509727) internal successors, (260), 257 states have internal predecessors, (260), 37 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:58:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 333 transitions. [2022-01-31 19:58:03,603 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 333 transitions. Word has length 117 [2022-01-31 19:58:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:03,603 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 333 transitions. [2022-01-31 19:58:03,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 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 19:58:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 333 transitions. [2022-01-31 19:58:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:58:03,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:03,604 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:03,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:58:03,605 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1580297923, now seen corresponding path program 34 times [2022-01-31 19:58:03,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153528926] [2022-01-31 19:58:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:03,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:03,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:03,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:03,609 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:04,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:04,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:04,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153528926] [2022-01-31 19:58:04,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [153528926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:04,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:04,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:58:04,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937196988] [2022-01-31 19:58:04,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:04,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:58:04,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:58:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:58:04,192 INFO L87 Difference]: Start difference. First operand 297 states and 333 transitions. Second operand has 39 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 38 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:04,668 INFO L93 Difference]: Finished difference Result 493 states and 568 transitions. [2022-01-31 19:58:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:58:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 38 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:58:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:04,670 INFO L225 Difference]: With dead ends: 493 [2022-01-31 19:58:04,670 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 19:58:04,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:58:04,671 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 375 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:04,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 120 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 19:58:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 305. [2022-01-31 19:58:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 264 states have (on average 1.0113636363636365) internal successors, (267), 264 states have internal predecessors, (267), 38 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 19:58:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 342 transitions. [2022-01-31 19:58:04,730 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 342 transitions. Word has length 120 [2022-01-31 19:58:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:04,730 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 342 transitions. [2022-01-31 19:58:04,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 38 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 342 transitions. [2022-01-31 19:58:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 19:58:04,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:04,731 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:04,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:58:04,732 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash -904443794, now seen corresponding path program 35 times [2022-01-31 19:58:04,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:04,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628121622] [2022-01-31 19:58:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:04,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:04,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:04,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:04,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:05,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628121622] [2022-01-31 19:58:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628121622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:05,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:05,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:58:05,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212825009] [2022-01-31 19:58:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:05,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:58:05,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:58:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:58:05,403 INFO L87 Difference]: Start difference. First operand 305 states and 342 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 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 19:58:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:05,904 INFO L93 Difference]: Finished difference Result 506 states and 583 transitions. [2022-01-31 19:58:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:58:05,904 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 19:58:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:05,906 INFO L225 Difference]: With dead ends: 506 [2022-01-31 19:58:05,906 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 19:58:05,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:58:05,908 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 382 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:05,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 112 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 19:58:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2022-01-31 19:58:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 39 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:58:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 351 transitions. [2022-01-31 19:58:05,948 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 351 transitions. Word has length 123 [2022-01-31 19:58:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:05,949 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 351 transitions. [2022-01-31 19:58:05,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 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 19:58:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 351 transitions. [2022-01-31 19:58:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 19:58:05,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:05,949 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:05,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:58:05,950 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash -83588381, now seen corresponding path program 36 times [2022-01-31 19:58:05,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:05,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454479523] [2022-01-31 19:58:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:05,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:05,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:05,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:05,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:06,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:06,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454479523] [2022-01-31 19:58:06,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1454479523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:06,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:06,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 19:58:06,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371246354] [2022-01-31 19:58:06,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:06,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 19:58:06,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:06,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 19:58:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:58:06,574 INFO L87 Difference]: Start difference. First operand 313 states and 351 transitions. Second operand has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 40 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:07,078 INFO L93 Difference]: Finished difference Result 519 states and 598 transitions. [2022-01-31 19:58:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:58:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 40 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 19:58:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:07,081 INFO L225 Difference]: With dead ends: 519 [2022-01-31 19:58:07,081 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 19:58:07,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:58:07,083 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 353 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:07,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 124 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 19:58:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2022-01-31 19:58:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 40 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 19:58:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 360 transitions. [2022-01-31 19:58:07,126 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 360 transitions. Word has length 126 [2022-01-31 19:58:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 360 transitions. [2022-01-31 19:58:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.975609756097561) internal successors, (122), 40 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 360 transitions. [2022-01-31 19:58:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 19:58:07,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:07,127 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:07,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:58:07,127 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1523763122, now seen corresponding path program 37 times [2022-01-31 19:58:07,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:07,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889817612] [2022-01-31 19:58:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:07,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:07,129 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:07,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:07,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:07,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889817612] [2022-01-31 19:58:07,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889817612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:07,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:07,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:58:07,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742745225] [2022-01-31 19:58:07,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:07,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:58:07,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:58:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:58:07,778 INFO L87 Difference]: Start difference. First operand 321 states and 360 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 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 19:58:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:08,329 INFO L93 Difference]: Finished difference Result 532 states and 613 transitions. [2022-01-31 19:58:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:58:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 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 129 [2022-01-31 19:58:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:08,332 INFO L225 Difference]: With dead ends: 532 [2022-01-31 19:58:08,332 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 19:58:08,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:58:08,333 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 504 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:08,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 106 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 19:58:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2022-01-31 19:58:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 285 states have (on average 1.0105263157894737) internal successors, (288), 285 states have internal predecessors, (288), 41 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 19:58:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 369 transitions. [2022-01-31 19:58:08,391 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 369 transitions. Word has length 129 [2022-01-31 19:58:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:08,391 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 369 transitions. [2022-01-31 19:58:08,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 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 19:58:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 369 transitions. [2022-01-31 19:58:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:58:08,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:08,392 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:08,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:58:08,392 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash 953814787, now seen corresponding path program 38 times [2022-01-31 19:58:08,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:08,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861479733] [2022-01-31 19:58:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:08,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:08,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:08,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:08,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:09,057 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861479733] [2022-01-31 19:58:09,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [861479733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:09,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:09,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 19:58:09,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658666738] [2022-01-31 19:58:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:09,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 19:58:09,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 19:58:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:58:09,059 INFO L87 Difference]: Start difference. First operand 329 states and 369 transitions. Second operand has 43 states, 43 states have (on average 2.9767441860465116) internal successors, (128), 42 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:09,543 INFO L93 Difference]: Finished difference Result 545 states and 628 transitions. [2022-01-31 19:58:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:58:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9767441860465116) internal successors, (128), 42 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-01-31 19:58:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:09,545 INFO L225 Difference]: With dead ends: 545 [2022-01-31 19:58:09,545 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 19:58:09,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:58:09,546 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 532 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:09,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 118 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 19:58:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2022-01-31 19:58:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 292 states have (on average 1.0102739726027397) internal successors, (295), 292 states have internal predecessors, (295), 42 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 19:58:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 378 transitions. [2022-01-31 19:58:09,604 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 378 transitions. Word has length 132 [2022-01-31 19:58:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:09,604 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 378 transitions. [2022-01-31 19:58:09,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9767441860465116) internal successors, (128), 42 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 378 transitions. [2022-01-31 19:58:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 19:58:09,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:09,605 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:09,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:58:09,605 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1464320046, now seen corresponding path program 39 times [2022-01-31 19:58:09,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:09,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448789714] [2022-01-31 19:58:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:09,608 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:09,608 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:09,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:09,610 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:10,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:10,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448789714] [2022-01-31 19:58:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448789714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:10,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:10,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:58:10,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018200874] [2022-01-31 19:58:10,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:10,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:58:10,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:58:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:58:10,273 INFO L87 Difference]: Start difference. First operand 337 states and 378 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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 19:58:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:10,780 INFO L93 Difference]: Finished difference Result 558 states and 643 transitions. [2022-01-31 19:58:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:58:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 19:58:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:10,782 INFO L225 Difference]: With dead ends: 558 [2022-01-31 19:58:10,782 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 19:58:10,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:58:10,784 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 530 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:10,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 110 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 19:58:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2022-01-31 19:58:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 299 states have (on average 1.0100334448160535) internal successors, (302), 299 states have internal predecessors, (302), 43 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 19:58:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-01-31 19:58:10,845 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 135 [2022-01-31 19:58:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:10,845 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-01-31 19:58:10,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 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 19:58:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-01-31 19:58:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:58:10,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:10,846 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:10,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:58:10,847 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1447295779, now seen corresponding path program 40 times [2022-01-31 19:58:10,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:10,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722919167] [2022-01-31 19:58:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:10,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:10,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:10,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:10,852 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:11,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722919167] [2022-01-31 19:58:11,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722919167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:11,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:11,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:58:11,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974024492] [2022-01-31 19:58:11,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:11,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:58:11,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:58:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:58:11,551 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 45 states, 45 states have (on average 2.977777777777778) internal successors, (134), 44 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:12,086 INFO L93 Difference]: Finished difference Result 571 states and 658 transitions. [2022-01-31 19:58:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:58:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.977777777777778) internal successors, (134), 44 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 19:58:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:12,088 INFO L225 Difference]: With dead ends: 571 [2022-01-31 19:58:12,088 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 19:58:12,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:58:12,090 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 432 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:12,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 122 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 19:58:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 353. [2022-01-31 19:58:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 44 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:58:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 396 transitions. [2022-01-31 19:58:12,159 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 396 transitions. Word has length 138 [2022-01-31 19:58:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:12,159 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 396 transitions. [2022-01-31 19:58:12,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.977777777777778) internal successors, (134), 44 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 396 transitions. [2022-01-31 19:58:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 19:58:12,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:12,160 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:12,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:58:12,160 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1083498510, now seen corresponding path program 41 times [2022-01-31 19:58:12,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:12,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856071222] [2022-01-31 19:58:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:12,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:12,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:12,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:12,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:12,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:12,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856071222] [2022-01-31 19:58:12,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856071222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:12,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:12,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:58:12,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182949288] [2022-01-31 19:58:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:12,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:58:12,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:58:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:58:12,940 INFO L87 Difference]: Start difference. First operand 353 states and 396 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 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 19:58:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:13,469 INFO L93 Difference]: Finished difference Result 584 states and 673 transitions. [2022-01-31 19:58:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:58:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 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 141 [2022-01-31 19:58:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:13,471 INFO L225 Difference]: With dead ends: 584 [2022-01-31 19:58:13,471 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 19:58:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:58:13,472 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 451 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:13,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 124 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 19:58:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 361. [2022-01-31 19:58:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 313 states have (on average 1.0095846645367412) internal successors, (316), 313 states have internal predecessors, (316), 45 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-31 19:58:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 405 transitions. [2022-01-31 19:58:13,536 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 405 transitions. Word has length 141 [2022-01-31 19:58:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:13,536 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 405 transitions. [2022-01-31 19:58:13,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 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 19:58:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 405 transitions. [2022-01-31 19:58:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:58:13,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:13,537 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:13,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:58:13,537 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:13,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:13,538 INFO L85 PathProgramCache]: Analyzing trace with hash -598454461, now seen corresponding path program 42 times [2022-01-31 19:58:13,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:13,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431626308] [2022-01-31 19:58:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:13,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:13,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:13,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:13,543 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:14,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431626308] [2022-01-31 19:58:14,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [431626308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:14,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:14,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:58:14,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359886156] [2022-01-31 19:58:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:58:14,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:58:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:58:14,271 INFO L87 Difference]: Start difference. First operand 361 states and 405 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:14,885 INFO L93 Difference]: Finished difference Result 597 states and 688 transitions. [2022-01-31 19:58:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:58:14,885 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 19:58:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:14,887 INFO L225 Difference]: With dead ends: 597 [2022-01-31 19:58:14,887 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 19:58:14,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:58:14,888 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 617 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:14,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 116 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 19:58:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2022-01-31 19:58:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 320 states have (on average 1.009375) internal successors, (323), 320 states have internal predecessors, (323), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 19:58:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 414 transitions. [2022-01-31 19:58:14,940 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 414 transitions. Word has length 144 [2022-01-31 19:58:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:14,940 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 414 transitions. [2022-01-31 19:58:14,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 414 transitions. [2022-01-31 19:58:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 19:58:14,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:14,941 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:14,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:58:14,941 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1724028910, now seen corresponding path program 43 times [2022-01-31 19:58:14,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:14,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757043887] [2022-01-31 19:58:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:14,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:14,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:14,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:14,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:15,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:15,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:15,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757043887] [2022-01-31 19:58:15,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [757043887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:15,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:15,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:58:15,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363040818] [2022-01-31 19:58:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:15,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:58:15,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:58:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:58:15,710 INFO L87 Difference]: Start difference. First operand 369 states and 414 transitions. Second operand has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 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 19:58:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:16,265 INFO L93 Difference]: Finished difference Result 610 states and 703 transitions. [2022-01-31 19:58:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:58:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 19:58:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:16,267 INFO L225 Difference]: With dead ends: 610 [2022-01-31 19:58:16,268 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 19:58:16,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:58:16,269 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 531 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:16,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 128 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 19:58:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-01-31 19:58:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 47 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 19:58:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 423 transitions. [2022-01-31 19:58:16,348 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 423 transitions. Word has length 147 [2022-01-31 19:58:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:16,349 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 423 transitions. [2022-01-31 19:58:16,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 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 19:58:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 423 transitions. [2022-01-31 19:58:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:58:16,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:16,350 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:16,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:58:16,350 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1097004189, now seen corresponding path program 44 times [2022-01-31 19:58:16,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:16,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390117457] [2022-01-31 19:58:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:16,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:16,352 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:16,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:16,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,148 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 19:58:17,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:17,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390117457] [2022-01-31 19:58:17,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [390117457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:17,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:17,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:58:17,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744260619] [2022-01-31 19:58:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:17,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:58:17,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:58:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:58:17,150 INFO L87 Difference]: Start difference. First operand 377 states and 423 transitions. Second operand has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 48 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:17,774 INFO L93 Difference]: Finished difference Result 623 states and 718 transitions. [2022-01-31 19:58:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:58:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 48 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 19:58:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:17,776 INFO L225 Difference]: With dead ends: 623 [2022-01-31 19:58:17,776 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 19:58:17,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:58:17,777 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 571 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:17,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 125 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 19:58:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2022-01-31 19:58:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 334 states have (on average 1.0089820359281436) internal successors, (337), 334 states have internal predecessors, (337), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 19:58:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 432 transitions. [2022-01-31 19:58:17,836 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 432 transitions. Word has length 150 [2022-01-31 19:58:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:17,836 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 432 transitions. [2022-01-31 19:58:17,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.979591836734694) internal successors, (146), 48 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 432 transitions. [2022-01-31 19:58:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 19:58:17,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:17,837 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:17,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:58:17,837 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:17,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1425991630, now seen corresponding path program 45 times [2022-01-31 19:58:17,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:17,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709216326] [2022-01-31 19:58:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:17,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:17,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:17,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:17,841 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:18,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709216326] [2022-01-31 19:58:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709216326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:18,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:18,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:58:18,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173378892] [2022-01-31 19:58:18,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:18,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:58:18,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:58:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:58:18,666 INFO L87 Difference]: Start difference. First operand 385 states and 432 transitions. Second operand has 50 states, 50 states have (on average 2.98) internal successors, (149), 49 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 19:58:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:19,281 INFO L93 Difference]: Finished difference Result 636 states and 733 transitions. [2022-01-31 19:58:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:58:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.98) internal successors, (149), 49 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 153 [2022-01-31 19:58:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:19,283 INFO L225 Difference]: With dead ends: 636 [2022-01-31 19:58:19,283 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 19:58:19,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:58:19,284 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 500 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:19,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 122 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:58:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 19:58:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2022-01-31 19:58:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 341 states have (on average 1.0087976539589443) internal successors, (344), 341 states have internal predecessors, (344), 49 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-31 19:58:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 441 transitions. [2022-01-31 19:58:19,357 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 441 transitions. Word has length 153 [2022-01-31 19:58:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:19,357 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 441 transitions. [2022-01-31 19:58:19,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.98) internal successors, (149), 49 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 19:58:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 441 transitions. [2022-01-31 19:58:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:58:19,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:19,358 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:19,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:58:19,359 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2066755459, now seen corresponding path program 46 times [2022-01-31 19:58:19,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:19,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998964267] [2022-01-31 19:58:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:19,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:19,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:19,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:19,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:20,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:20,238 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998964267] [2022-01-31 19:58:20,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [998964267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:20,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:20,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 19:58:20,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324911069] [2022-01-31 19:58:20,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:20,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 19:58:20,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:20,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 19:58:20,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:58:20,241 INFO L87 Difference]: Start difference. First operand 393 states and 441 transitions. Second operand has 51 states, 51 states have (on average 2.980392156862745) internal successors, (152), 50 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:20,881 INFO L93 Difference]: Finished difference Result 649 states and 748 transitions. [2022-01-31 19:58:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:58:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.980392156862745) internal successors, (152), 50 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-01-31 19:58:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:20,883 INFO L225 Difference]: With dead ends: 649 [2022-01-31 19:58:20,883 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 19:58:20,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:58:20,885 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 573 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:20,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 149 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 19:58:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 401. [2022-01-31 19:58:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 348 states have (on average 1.0086206896551724) internal successors, (351), 348 states have internal predecessors, (351), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 19:58:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 450 transitions. [2022-01-31 19:58:20,981 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 450 transitions. Word has length 156 [2022-01-31 19:58:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:20,981 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 450 transitions. [2022-01-31 19:58:20,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.980392156862745) internal successors, (152), 50 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 450 transitions. [2022-01-31 19:58:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 19:58:20,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:20,982 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:20,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:58:20,983 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -67645522, now seen corresponding path program 47 times [2022-01-31 19:58:20,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:20,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274034071] [2022-01-31 19:58:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:20,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:20,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:20,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:20,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:21,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:21,884 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:21,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274034071] [2022-01-31 19:58:21,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274034071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:21,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:21,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:58:21,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491443908] [2022-01-31 19:58:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:21,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:58:21,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:58:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:58:21,886 INFO L87 Difference]: Start difference. First operand 401 states and 450 transitions. Second operand has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 51 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 19:58:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:22,547 INFO L93 Difference]: Finished difference Result 662 states and 763 transitions. [2022-01-31 19:58:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:58:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 51 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 19:58:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:22,549 INFO L225 Difference]: With dead ends: 662 [2022-01-31 19:58:22,549 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 19:58:22,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:58:22,550 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 616 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:22,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 136 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:22,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 19:58:22,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2022-01-31 19:58:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 355 states have (on average 1.008450704225352) internal successors, (358), 355 states have internal predecessors, (358), 51 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-31 19:58:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 459 transitions. [2022-01-31 19:58:22,627 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 459 transitions. Word has length 159 [2022-01-31 19:58:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:22,627 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 459 transitions. [2022-01-31 19:58:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.980769230769231) internal successors, (155), 51 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 19:58:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 459 transitions. [2022-01-31 19:58:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:58:22,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:22,628 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:22,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:58:22,629 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash 983546787, now seen corresponding path program 48 times [2022-01-31 19:58:22,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:22,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226287282] [2022-01-31 19:58:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:22,631 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:22,631 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:22,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:22,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:23,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:23,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226287282] [2022-01-31 19:58:23,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226287282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:23,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:23,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:58:23,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046913511] [2022-01-31 19:58:23,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:23,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:58:23,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:58:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:58:23,618 INFO L87 Difference]: Start difference. First operand 409 states and 459 transitions. Second operand has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:24,371 INFO L93 Difference]: Finished difference Result 675 states and 778 transitions. [2022-01-31 19:58:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:58:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 19:58:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:24,373 INFO L225 Difference]: With dead ends: 675 [2022-01-31 19:58:24,373 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 19:58:24,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:58:24,374 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 467 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:24,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 153 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 19:58:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2022-01-31 19:58:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 52 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 19:58:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 468 transitions. [2022-01-31 19:58:24,449 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 468 transitions. Word has length 162 [2022-01-31 19:58:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 468 transitions. [2022-01-31 19:58:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 52 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 468 transitions. [2022-01-31 19:58:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 19:58:24,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:24,451 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:58:24,451 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1847898226, now seen corresponding path program 49 times [2022-01-31 19:58:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922540461] [2022-01-31 19:58:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:24,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:24,454 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:24,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:24,456 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:25,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:25,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922540461] [2022-01-31 19:58:25,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922540461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:25,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:25,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:58:25,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426336232] [2022-01-31 19:58:25,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:25,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:58:25,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:25,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:58:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:58:25,478 INFO L87 Difference]: Start difference. First operand 417 states and 468 transitions. Second operand has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 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 19:58:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:26,140 INFO L93 Difference]: Finished difference Result 688 states and 793 transitions. [2022-01-31 19:58:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:58:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 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 165 [2022-01-31 19:58:26,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:26,142 INFO L225 Difference]: With dead ends: 688 [2022-01-31 19:58:26,142 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 19:58:26,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:58:26,143 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 597 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:26,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 135 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 19:58:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 425. [2022-01-31 19:58:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 369 states have (on average 1.008130081300813) internal successors, (372), 369 states have internal predecessors, (372), 53 states have call successors, (53), 3 states have call predecessors, (53), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-31 19:58:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 477 transitions. [2022-01-31 19:58:26,251 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 477 transitions. Word has length 165 [2022-01-31 19:58:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:26,252 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 477 transitions. [2022-01-31 19:58:26,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 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 19:58:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 477 transitions. [2022-01-31 19:58:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:58:26,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:26,253 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:26,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:58:26,253 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:26,253 INFO L85 PathProgramCache]: Analyzing trace with hash -268587069, now seen corresponding path program 50 times [2022-01-31 19:58:26,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:26,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861083518] [2022-01-31 19:58:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:26,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:26,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:26,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:26,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:27,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:27,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:27,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861083518] [2022-01-31 19:58:27,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1861083518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:27,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:27,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:58:27,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964528675] [2022-01-31 19:58:27,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:27,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:58:27,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:58:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:58:27,283 INFO L87 Difference]: Start difference. First operand 425 states and 477 transitions. Second operand has 55 states, 55 states have (on average 2.981818181818182) internal successors, (164), 54 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:27,994 INFO L93 Difference]: Finished difference Result 701 states and 808 transitions. [2022-01-31 19:58:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:58:27,994 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.981818181818182) internal successors, (164), 54 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-01-31 19:58:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:27,997 INFO L225 Difference]: With dead ends: 701 [2022-01-31 19:58:27,997 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 19:58:27,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:58:27,998 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 490 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 152 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 19:58:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 433. [2022-01-31 19:58:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 376 states have (on average 1.0079787234042554) internal successors, (379), 376 states have internal predecessors, (379), 54 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 19:58:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 486 transitions. [2022-01-31 19:58:28,092 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 486 transitions. Word has length 168 [2022-01-31 19:58:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:28,092 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 486 transitions. [2022-01-31 19:58:28,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.981818181818182) internal successors, (164), 54 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 486 transitions. [2022-01-31 19:58:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 19:58:28,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:28,093 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:28,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:58:28,093 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1918330734, now seen corresponding path program 51 times [2022-01-31 19:58:28,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:28,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552077321] [2022-01-31 19:58:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:28,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:28,096 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:28,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:28,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:29,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:29,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:29,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552077321] [2022-01-31 19:58:29,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [552077321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:29,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:29,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:58:29,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883598571] [2022-01-31 19:58:29,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:29,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:58:29,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:58:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:58:29,131 INFO L87 Difference]: Start difference. First operand 433 states and 486 transitions. Second operand has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 55 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 19:58:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:29,850 INFO L93 Difference]: Finished difference Result 714 states and 823 transitions. [2022-01-31 19:58:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:58:29,851 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 55 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 19:58:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:29,852 INFO L225 Difference]: With dead ends: 714 [2022-01-31 19:58:29,852 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 19:58:29,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:58:29,854 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 515 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:29,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 159 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 19:58:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 441. [2022-01-31 19:58:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 383 states have (on average 1.0078328981723237) internal successors, (386), 383 states have internal predecessors, (386), 55 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 19:58:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 495 transitions. [2022-01-31 19:58:29,950 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 495 transitions. Word has length 171 [2022-01-31 19:58:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:29,950 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 495 transitions. [2022-01-31 19:58:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.982142857142857) internal successors, (167), 55 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 19:58:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 495 transitions. [2022-01-31 19:58:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:58:29,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:29,951 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:29,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:58:29,951 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2027686883, now seen corresponding path program 52 times [2022-01-31 19:58:29,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:29,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360612581] [2022-01-31 19:58:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:29,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:29,954 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:29,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:29,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:30,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:30,989 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360612581] [2022-01-31 19:58:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360612581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:30,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:30,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:58:30,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905249271] [2022-01-31 19:58:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:30,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:58:30,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:58:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:58:30,992 INFO L87 Difference]: Start difference. First operand 441 states and 495 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 56 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:31,718 INFO L93 Difference]: Finished difference Result 727 states and 838 transitions. [2022-01-31 19:58:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:58:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 56 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 19:58:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:31,720 INFO L225 Difference]: With dead ends: 727 [2022-01-31 19:58:31,720 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 19:58:31,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:58:31,721 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 603 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:31,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 151 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 19:58:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 449. [2022-01-31 19:58:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 56 states have call successors, (56), 3 states have call predecessors, (56), 2 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 19:58:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 504 transitions. [2022-01-31 19:58:31,814 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 504 transitions. Word has length 174 [2022-01-31 19:58:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:31,814 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 504 transitions. [2022-01-31 19:58:31,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 56 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 504 transitions. [2022-01-31 19:58:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 19:58:31,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:31,816 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:31,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:58:31,816 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash -23455922, now seen corresponding path program 53 times [2022-01-31 19:58:31,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:31,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544542696] [2022-01-31 19:58:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:31,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:31,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:31,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:31,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:33,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544542696] [2022-01-31 19:58:33,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544542696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:33,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:33,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:58:33,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619989867] [2022-01-31 19:58:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:33,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:58:33,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:33,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:58:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:58:33,084 INFO L87 Difference]: Start difference. First operand 449 states and 504 transitions. Second operand has 58 states, 58 states have (on average 2.9827586206896552) internal successors, (173), 57 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 19:58:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:33,890 INFO L93 Difference]: Finished difference Result 740 states and 853 transitions. [2022-01-31 19:58:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:58:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9827586206896552) internal successors, (173), 57 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 177 [2022-01-31 19:58:33,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:33,897 INFO L225 Difference]: With dead ends: 740 [2022-01-31 19:58:33,897 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 19:58:33,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:58:33,900 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 613 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:33,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 153 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 19:58:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 457. [2022-01-31 19:58:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 397 states have (on average 1.0075566750629723) internal successors, (400), 397 states have internal predecessors, (400), 57 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-01-31 19:58:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 513 transitions. [2022-01-31 19:58:34,034 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 513 transitions. Word has length 177 [2022-01-31 19:58:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:34,034 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 513 transitions. [2022-01-31 19:58:34,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9827586206896552) internal successors, (173), 57 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 19:58:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 513 transitions. [2022-01-31 19:58:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:58:34,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:34,035 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:34,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:58:34,035 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:34,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1119039485, now seen corresponding path program 54 times [2022-01-31 19:58:34,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:34,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019359880] [2022-01-31 19:58:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:34,037 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:34,037 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:34,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:34,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:35,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:35,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019359880] [2022-01-31 19:58:35,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019359880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:35,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:35,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:58:35,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936213824] [2022-01-31 19:58:35,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:35,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:58:35,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:58:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:58:35,167 INFO L87 Difference]: Start difference. First operand 457 states and 513 transitions. Second operand has 59 states, 59 states have (on average 2.983050847457627) internal successors, (176), 58 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:35,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:35,961 INFO L93 Difference]: Finished difference Result 753 states and 868 transitions. [2022-01-31 19:58:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:58:35,962 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.983050847457627) internal successors, (176), 58 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-01-31 19:58:35,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:35,963 INFO L225 Difference]: With dead ends: 753 [2022-01-31 19:58:35,963 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 19:58:35,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:58:35,965 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 608 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:35,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 155 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 19:58:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 465. [2022-01-31 19:58:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 404 states have (on average 1.0074257425742574) internal successors, (407), 404 states have internal predecessors, (407), 58 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 19:58:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 522 transitions. [2022-01-31 19:58:36,068 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 522 transitions. Word has length 180 [2022-01-31 19:58:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:36,069 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 522 transitions. [2022-01-31 19:58:36,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.983050847457627) internal successors, (176), 58 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 522 transitions. [2022-01-31 19:58:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 19:58:36,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:36,069 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:36,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:58:36,070 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:36,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2102484782, now seen corresponding path program 55 times [2022-01-31 19:58:36,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:36,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392624078] [2022-01-31 19:58:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:36,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:36,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:36,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:36,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:37,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:37,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:37,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392624078] [2022-01-31 19:58:37,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392624078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:37,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:37,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:58:37,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751866320] [2022-01-31 19:58:37,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:37,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:58:37,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:37,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:58:37,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:58:37,230 INFO L87 Difference]: Start difference. First operand 465 states and 522 transitions. Second operand has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 59 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 19:58:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:38,013 INFO L93 Difference]: Finished difference Result 766 states and 883 transitions. [2022-01-31 19:58:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:58:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 59 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 19:58:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:38,015 INFO L225 Difference]: With dead ends: 766 [2022-01-31 19:58:38,015 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 19:58:38,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:58:38,017 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 606 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:38,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 157 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 19:58:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 473. [2022-01-31 19:58:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 411 states have (on average 1.0072992700729928) internal successors, (414), 411 states have internal predecessors, (414), 59 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 19:58:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 531 transitions. [2022-01-31 19:58:38,113 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 531 transitions. Word has length 183 [2022-01-31 19:58:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 531 transitions. [2022-01-31 19:58:38,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 59 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 19:58:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 531 transitions. [2022-01-31 19:58:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:58:38,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:38,114 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:38,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:58:38,114 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash -807273437, now seen corresponding path program 56 times [2022-01-31 19:58:38,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:38,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98710914] [2022-01-31 19:58:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:38,117 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:38,117 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:38,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:38,120 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:39,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:39,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98710914] [2022-01-31 19:58:39,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [98710914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:39,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:39,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 19:58:39,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330057240] [2022-01-31 19:58:39,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:39,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 19:58:39,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:39,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 19:58:39,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:58:39,322 INFO L87 Difference]: Start difference. First operand 473 states and 531 transitions. Second operand has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 60 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:40,169 INFO L93 Difference]: Finished difference Result 779 states and 898 transitions. [2022-01-31 19:58:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:58:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 60 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 19:58:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:40,171 INFO L225 Difference]: With dead ends: 779 [2022-01-31 19:58:40,171 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 19:58:40,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:58:40,173 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 763 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:40,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 144 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 19:58:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 481. [2022-01-31 19:58:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 418 states have (on average 1.007177033492823) internal successors, (421), 418 states have internal predecessors, (421), 60 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 19:58:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 540 transitions. [2022-01-31 19:58:40,276 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 540 transitions. Word has length 186 [2022-01-31 19:58:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:40,277 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 540 transitions. [2022-01-31 19:58:40,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 60 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 540 transitions. [2022-01-31 19:58:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 19:58:40,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:40,278 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:40,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:58:40,278 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -89440498, now seen corresponding path program 57 times [2022-01-31 19:58:40,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:40,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922774163] [2022-01-31 19:58:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:40,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:40,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:40,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:40,284 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:41,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:41,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922774163] [2022-01-31 19:58:41,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922774163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:41,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:41,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:58:41,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791056589] [2022-01-31 19:58:41,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:41,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:58:41,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:58:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:58:41,707 INFO L87 Difference]: Start difference. First operand 481 states and 540 transitions. Second operand has 62 states, 62 states have (on average 2.9838709677419355) internal successors, (185), 61 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 19:58:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:42,638 INFO L93 Difference]: Finished difference Result 792 states and 913 transitions. [2022-01-31 19:58:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 19:58:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.9838709677419355) internal successors, (185), 61 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 189 [2022-01-31 19:58:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:42,641 INFO L225 Difference]: With dead ends: 792 [2022-01-31 19:58:42,641 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 19:58:42,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:58:42,642 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 698 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:42,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 151 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 19:58:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 489. [2022-01-31 19:58:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 425 states have (on average 1.0070588235294118) internal successors, (428), 425 states have internal predecessors, (428), 61 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-31 19:58:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 549 transitions. [2022-01-31 19:58:42,749 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 549 transitions. Word has length 189 [2022-01-31 19:58:42,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:42,749 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 549 transitions. [2022-01-31 19:58:42,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.9838709677419355) internal successors, (185), 61 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 19:58:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 549 transitions. [2022-01-31 19:58:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 19:58:42,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:42,750 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:58:42,751 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:42,751 INFO L85 PathProgramCache]: Analyzing trace with hash 229478467, now seen corresponding path program 58 times [2022-01-31 19:58:42,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:42,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895998457] [2022-01-31 19:58:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:42,753 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:42,753 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:42,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:42,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:44,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895998457] [2022-01-31 19:58:44,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895998457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:44,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:44,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 19:58:44,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447824481] [2022-01-31 19:58:44,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:44,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 19:58:44,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 19:58:44,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:58:44,082 INFO L87 Difference]: Start difference. First operand 489 states and 549 transitions. Second operand has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 62 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:44,976 INFO L93 Difference]: Finished difference Result 805 states and 928 transitions. [2022-01-31 19:58:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:58:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 62 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-01-31 19:58:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:44,978 INFO L225 Difference]: With dead ends: 805 [2022-01-31 19:58:44,978 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 19:58:44,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:58:44,980 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 789 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:44,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 158 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 19:58:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 497. [2022-01-31 19:58:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 432 states have (on average 1.0069444444444444) internal successors, (435), 432 states have internal predecessors, (435), 62 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-01-31 19:58:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 558 transitions. [2022-01-31 19:58:45,092 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 558 transitions. Word has length 192 [2022-01-31 19:58:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:45,092 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 558 transitions. [2022-01-31 19:58:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 62 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 558 transitions. [2022-01-31 19:58:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 19:58:45,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:45,093 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:45,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:58:45,093 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:45,094 INFO L85 PathProgramCache]: Analyzing trace with hash 676706030, now seen corresponding path program 59 times [2022-01-31 19:58:45,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:45,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590239254] [2022-01-31 19:58:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:45,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:45,096 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:45,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:45,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:46,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:46,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590239254] [2022-01-31 19:58:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1590239254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:46,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:46,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:58:46,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996308688] [2022-01-31 19:58:46,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:58:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:46,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:58:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:58:46,432 INFO L87 Difference]: Start difference. First operand 497 states and 558 transitions. Second operand has 64 states, 64 states have (on average 2.984375) internal successors, (191), 63 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 19:58:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:47,316 INFO L93 Difference]: Finished difference Result 818 states and 943 transitions. [2022-01-31 19:58:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:58:47,317 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.984375) internal successors, (191), 63 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 19:58:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:47,319 INFO L225 Difference]: With dead ends: 818 [2022-01-31 19:58:47,319 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 19:58:47,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:58:47,321 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 607 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:47,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 165 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:58:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 19:58:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2022-01-31 19:58:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.0068337129840548) internal successors, (442), 439 states have internal predecessors, (442), 63 states have call successors, (63), 3 states have call predecessors, (63), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-01-31 19:58:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 567 transitions. [2022-01-31 19:58:47,435 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 567 transitions. Word has length 195 [2022-01-31 19:58:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:47,435 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 567 transitions. [2022-01-31 19:58:47,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.984375) internal successors, (191), 63 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 19:58:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 567 transitions. [2022-01-31 19:58:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 19:58:47,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:47,436 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:47,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:58:47,437 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1044483171, now seen corresponding path program 60 times [2022-01-31 19:58:47,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785578167] [2022-01-31 19:58:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:47,439 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:47,439 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:47,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:47,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:48,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:48,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:48,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785578167] [2022-01-31 19:58:48,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [785578167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:48,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:48,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:58:48,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714386993] [2022-01-31 19:58:48,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:48,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:58:48,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:58:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:58:48,759 INFO L87 Difference]: Start difference. First operand 505 states and 567 transitions. Second operand has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:49,693 INFO L93 Difference]: Finished difference Result 831 states and 958 transitions. [2022-01-31 19:58:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:58:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-01-31 19:58:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:49,695 INFO L225 Difference]: With dead ends: 831 [2022-01-31 19:58:49,695 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 19:58:49,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:58:49,697 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 812 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:49,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 162 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 19:58:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 513. [2022-01-31 19:58:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 19:58:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 576 transitions. [2022-01-31 19:58:49,817 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 576 transitions. Word has length 198 [2022-01-31 19:58:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:49,818 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 576 transitions. [2022-01-31 19:58:49,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9846153846153847) internal successors, (194), 64 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 576 transitions. [2022-01-31 19:58:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 19:58:49,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:49,819 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:49,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:58:49,819 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1031718606, now seen corresponding path program 61 times [2022-01-31 19:58:49,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272586088] [2022-01-31 19:58:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:49,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:49,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:49,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:49,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:51,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272586088] [2022-01-31 19:58:51,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272586088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:51,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:51,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:58:51,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400369848] [2022-01-31 19:58:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:51,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:58:51,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:58:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:58:51,306 INFO L87 Difference]: Start difference. First operand 513 states and 576 transitions. Second operand has 66 states, 66 states have (on average 2.984848484848485) internal successors, (197), 65 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 19:58:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:52,300 INFO L93 Difference]: Finished difference Result 844 states and 973 transitions. [2022-01-31 19:58:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:58:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.984848484848485) internal successors, (197), 65 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 201 [2022-01-31 19:58:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:52,303 INFO L225 Difference]: With dead ends: 844 [2022-01-31 19:58:52,303 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 19:58:52,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:58:52,304 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 711 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:52,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 179 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:52,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 19:58:52,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 521. [2022-01-31 19:58:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 453 states have (on average 1.0066225165562914) internal successors, (456), 453 states have internal predecessors, (456), 65 states have call successors, (65), 3 states have call predecessors, (65), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:58:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 585 transitions. [2022-01-31 19:58:52,434 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 585 transitions. Word has length 201 [2022-01-31 19:58:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:52,434 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 585 transitions. [2022-01-31 19:58:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.984848484848485) internal successors, (197), 65 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 19:58:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 585 transitions. [2022-01-31 19:58:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 19:58:52,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:52,435 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:58:52,436 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1280315261, now seen corresponding path program 62 times [2022-01-31 19:58:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801553631] [2022-01-31 19:58:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:52,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:52,438 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:52,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:52,441 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:53,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:53,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801553631] [2022-01-31 19:58:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801553631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:53,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:53,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:58:53,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064114495] [2022-01-31 19:58:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:53,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:58:53,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:58:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:58:53,881 INFO L87 Difference]: Start difference. First operand 521 states and 585 transitions. Second operand has 67 states, 67 states have (on average 2.985074626865672) internal successors, (200), 66 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:54,864 INFO L93 Difference]: Finished difference Result 857 states and 988 transitions. [2022-01-31 19:58:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:58:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.985074626865672) internal successors, (200), 66 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-01-31 19:58:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:54,866 INFO L225 Difference]: With dead ends: 857 [2022-01-31 19:58:54,866 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 19:58:54,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:58:54,867 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 715 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:54,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 181 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 19:58:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 529. [2022-01-31 19:58:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 460 states have (on average 1.0065217391304349) internal successors, (463), 460 states have internal predecessors, (463), 66 states have call successors, (66), 3 states have call predecessors, (66), 2 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 19:58:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 594 transitions. [2022-01-31 19:58:54,997 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 594 transitions. Word has length 204 [2022-01-31 19:58:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:54,997 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 594 transitions. [2022-01-31 19:58:54,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.985074626865672) internal successors, (200), 66 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 594 transitions. [2022-01-31 19:58:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 19:58:54,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:54,998 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:58:54,999 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash -690721106, now seen corresponding path program 63 times [2022-01-31 19:58:54,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:54,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498092935] [2022-01-31 19:58:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:55,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:55,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:55,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:55,005 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:56,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:56,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498092935] [2022-01-31 19:58:56,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498092935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:56,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:56,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:58:56,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211844459] [2022-01-31 19:58:56,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:56,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:58:56,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:58:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:58:56,479 INFO L87 Difference]: Start difference. First operand 529 states and 594 transitions. Second operand has 68 states, 68 states have (on average 2.985294117647059) internal successors, (203), 67 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 19:58:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:57,510 INFO L93 Difference]: Finished difference Result 870 states and 1003 transitions. [2022-01-31 19:58:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:58:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.985294117647059) internal successors, (203), 67 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 19:58:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:57,512 INFO L225 Difference]: With dead ends: 870 [2022-01-31 19:58:57,512 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 19:58:57,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:58:57,514 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 815 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:57,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 173 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 19:58:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 537. [2022-01-31 19:58:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 467 states have (on average 1.006423982869379) internal successors, (470), 467 states have internal predecessors, (470), 67 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 19:58:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 603 transitions. [2022-01-31 19:58:57,665 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 603 transitions. Word has length 207 [2022-01-31 19:58:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:57,665 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 603 transitions. [2022-01-31 19:58:57,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.985294117647059) internal successors, (203), 67 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 19:58:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 603 transitions. [2022-01-31 19:58:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:58:57,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:57,666 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:57,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:58:57,666 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1787477155, now seen corresponding path program 64 times [2022-01-31 19:58:57,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:57,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111440528] [2022-01-31 19:58:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:57,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:57,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:58:57,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:57,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:59,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:59,163 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 19:58:59,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111440528] [2022-01-31 19:58:59,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111440528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:59,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:59,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:58:59,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767182313] [2022-01-31 19:58:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:59,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:58:59,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:58:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:58:59,167 INFO L87 Difference]: Start difference. First operand 537 states and 603 transitions. Second operand has 69 states, 69 states have (on average 2.9855072463768115) internal successors, (206), 68 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:00,223 INFO L93 Difference]: Finished difference Result 883 states and 1018 transitions. [2022-01-31 19:59:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:59:00,223 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.9855072463768115) internal successors, (206), 68 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 19:59:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:00,225 INFO L225 Difference]: With dead ends: 883 [2022-01-31 19:59:00,225 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 19:59:00,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:59:00,227 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1026 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:00,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 160 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:59:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 19:59:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 545. [2022-01-31 19:59:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 474 states have (on average 1.0063291139240507) internal successors, (477), 474 states have internal predecessors, (477), 68 states have call successors, (68), 3 states have call predecessors, (68), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-01-31 19:59:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 612 transitions. [2022-01-31 19:59:00,372 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 612 transitions. Word has length 210 [2022-01-31 19:59:00,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:00,372 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 612 transitions. [2022-01-31 19:59:00,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.9855072463768115) internal successors, (206), 68 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 612 transitions. [2022-01-31 19:59:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 19:59:00,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:00,373 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:00,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:59:00,374 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash -695947634, now seen corresponding path program 65 times [2022-01-31 19:59:00,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:00,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684344444] [2022-01-31 19:59:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:00,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:00,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:00,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:00,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,053 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 19:59:02,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:02,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684344444] [2022-01-31 19:59:02,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [684344444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:02,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:02,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:59:02,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756803297] [2022-01-31 19:59:02,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:02,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:59:02,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:02,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:59:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:59:02,056 INFO L87 Difference]: Start difference. First operand 545 states and 612 transitions. Second operand has 70 states, 70 states have (on average 2.9857142857142858) internal successors, (209), 69 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 19:59:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:03,177 INFO L93 Difference]: Finished difference Result 896 states and 1033 transitions. [2022-01-31 19:59:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:59:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9857142857142858) internal successors, (209), 69 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 213 [2022-01-31 19:59:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:03,180 INFO L225 Difference]: With dead ends: 896 [2022-01-31 19:59:03,180 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 19:59:03,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:59:03,182 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 706 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:03,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 182 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 19:59:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 553. [2022-01-31 19:59:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 481 states have (on average 1.0062370062370063) internal successors, (484), 481 states have internal predecessors, (484), 69 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 19:59:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 621 transitions. [2022-01-31 19:59:03,368 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 621 transitions. Word has length 213 [2022-01-31 19:59:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:03,368 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 621 transitions. [2022-01-31 19:59:03,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9857142857142858) internal successors, (209), 69 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 19:59:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 621 transitions. [2022-01-31 19:59:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 19:59:03,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:03,369 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:03,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:59:03,370 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:03,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:03,370 INFO L85 PathProgramCache]: Analyzing trace with hash 702804163, now seen corresponding path program 66 times [2022-01-31 19:59:03,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:03,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504711662] [2022-01-31 19:59:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:03,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:03,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:03,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:03,376 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:04,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:04,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:04,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504711662] [2022-01-31 19:59:04,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504711662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:04,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:04,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:59:04,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731159925] [2022-01-31 19:59:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:04,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:59:04,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:59:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:59:04,961 INFO L87 Difference]: Start difference. First operand 553 states and 621 transitions. Second operand has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 70 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:06,060 INFO L93 Difference]: Finished difference Result 909 states and 1048 transitions. [2022-01-31 19:59:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:59:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 70 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-01-31 19:59:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:06,062 INFO L225 Difference]: With dead ends: 909 [2022-01-31 19:59:06,062 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 19:59:06,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:59:06,064 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 671 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:06,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 189 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:59:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 19:59:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 561. [2022-01-31 19:59:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 488 states have (on average 1.0061475409836065) internal successors, (491), 488 states have internal predecessors, (491), 70 states have call successors, (70), 3 states have call predecessors, (70), 2 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 19:59:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 630 transitions. [2022-01-31 19:59:06,225 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 630 transitions. Word has length 216 [2022-01-31 19:59:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:06,225 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 630 transitions. [2022-01-31 19:59:06,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 70 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 630 transitions. [2022-01-31 19:59:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 19:59:06,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:06,226 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:06,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:59:06,227 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1144882798, now seen corresponding path program 67 times [2022-01-31 19:59:06,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:06,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250687924] [2022-01-31 19:59:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:06,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:06,229 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:06,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:06,233 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:07,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:07,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250687924] [2022-01-31 19:59:07,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250687924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:07,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:07,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:59:07,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381990435] [2022-01-31 19:59:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:07,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:59:07,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:59:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:59:07,862 INFO L87 Difference]: Start difference. First operand 561 states and 630 transitions. Second operand has 72 states, 72 states have (on average 2.986111111111111) internal successors, (215), 71 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:09,026 INFO L93 Difference]: Finished difference Result 922 states and 1063 transitions. [2022-01-31 19:59:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:59:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.986111111111111) internal successors, (215), 71 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 19:59:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:09,028 INFO L225 Difference]: With dead ends: 922 [2022-01-31 19:59:09,028 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 19:59:09,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:59:09,030 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 777 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:09,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 186 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 19:59:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 569. [2022-01-31 19:59:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 495 states have (on average 1.006060606060606) internal successors, (498), 495 states have internal predecessors, (498), 71 states have call successors, (71), 3 states have call predecessors, (71), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-01-31 19:59:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 639 transitions. [2022-01-31 19:59:09,233 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 639 transitions. Word has length 219 [2022-01-31 19:59:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:09,234 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 639 transitions. [2022-01-31 19:59:09,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.986111111111111) internal successors, (215), 71 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 639 transitions. [2022-01-31 19:59:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 19:59:09,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:09,235 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:09,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:59:09,235 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1555198749, now seen corresponding path program 68 times [2022-01-31 19:59:09,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:09,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790831848] [2022-01-31 19:59:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:09,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:09,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:09,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:09,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:10,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:10,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790831848] [2022-01-31 19:59:10,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790831848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:10,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:59:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480639616] [2022-01-31 19:59:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:10,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:59:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:59:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:59:10,969 INFO L87 Difference]: Start difference. First operand 569 states and 639 transitions. Second operand has 73 states, 73 states have (on average 2.9863013698630136) internal successors, (218), 72 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:12,146 INFO L93 Difference]: Finished difference Result 935 states and 1078 transitions. [2022-01-31 19:59:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:59:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9863013698630136) internal successors, (218), 72 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 19:59:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:12,149 INFO L225 Difference]: With dead ends: 935 [2022-01-31 19:59:12,150 INFO L226 Difference]: Without dead ends: 581 [2022-01-31 19:59:12,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:59:12,152 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 790 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:12,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 193 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-31 19:59:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 577. [2022-01-31 19:59:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 502 states have (on average 1.0059760956175299) internal successors, (505), 502 states have internal predecessors, (505), 72 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-01-31 19:59:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 648 transitions. [2022-01-31 19:59:12,393 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 648 transitions. Word has length 222 [2022-01-31 19:59:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:12,394 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 648 transitions. [2022-01-31 19:59:12,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9863013698630136) internal successors, (218), 72 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 648 transitions. [2022-01-31 19:59:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 19:59:12,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:12,395 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:12,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:59:12,395 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash 757921358, now seen corresponding path program 69 times [2022-01-31 19:59:12,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:12,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633387550] [2022-01-31 19:59:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:12,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:12,398 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:12,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:12,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:14,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:14,163 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 19:59:14,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633387550] [2022-01-31 19:59:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [633387550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:14,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:14,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:59:14,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023842682] [2022-01-31 19:59:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:14,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:59:14,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:59:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:59:14,166 INFO L87 Difference]: Start difference. First operand 577 states and 648 transitions. Second operand has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 73 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:15,538 INFO L93 Difference]: Finished difference Result 948 states and 1093 transitions. [2022-01-31 19:59:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:59:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 73 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 19:59:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:15,541 INFO L225 Difference]: With dead ends: 948 [2022-01-31 19:59:15,541 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 19:59:15,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:59:15,543 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 860 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:15,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 195 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 19:59:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 585. [2022-01-31 19:59:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 509 states have (on average 1.005893909626719) internal successors, (512), 509 states have internal predecessors, (512), 73 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-01-31 19:59:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 657 transitions. [2022-01-31 19:59:15,748 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 657 transitions. Word has length 225 [2022-01-31 19:59:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 657 transitions. [2022-01-31 19:59:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 73 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 657 transitions. [2022-01-31 19:59:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 19:59:15,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:15,749 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:15,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:59:15,749 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1831235325, now seen corresponding path program 70 times [2022-01-31 19:59:15,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:15,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459825195] [2022-01-31 19:59:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:15,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:15,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:15,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:15,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:17,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:17,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459825195] [2022-01-31 19:59:17,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [459825195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:17,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:17,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:59:17,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416807386] [2022-01-31 19:59:17,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:17,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:59:17,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:59:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:59:17,545 INFO L87 Difference]: Start difference. First operand 585 states and 657 transitions. Second operand has 75 states, 75 states have (on average 2.986666666666667) internal successors, (224), 74 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:18,788 INFO L93 Difference]: Finished difference Result 961 states and 1108 transitions. [2022-01-31 19:59:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:59:18,788 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.986666666666667) internal successors, (224), 74 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2022-01-31 19:59:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:18,790 INFO L225 Difference]: With dead ends: 961 [2022-01-31 19:59:18,790 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 19:59:18,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:59:18,792 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 915 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:18,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 177 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 19:59:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 593. [2022-01-31 19:59:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 516 states have (on average 1.005813953488372) internal successors, (519), 516 states have internal predecessors, (519), 74 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-01-31 19:59:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 666 transitions. [2022-01-31 19:59:18,973 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 666 transitions. Word has length 228 [2022-01-31 19:59:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:18,973 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 666 transitions. [2022-01-31 19:59:18,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.986666666666667) internal successors, (224), 74 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 666 transitions. [2022-01-31 19:59:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 19:59:18,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:18,974 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:18,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:59:18,974 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2080309714, now seen corresponding path program 71 times [2022-01-31 19:59:18,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301915607] [2022-01-31 19:59:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:18,976 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:18,976 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:18,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:18,980 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:20,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:20,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:20,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301915607] [2022-01-31 19:59:20,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301915607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:20,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 19:59:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23287680] [2022-01-31 19:59:20,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:20,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 19:59:20,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 19:59:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:59:20,810 INFO L87 Difference]: Start difference. First operand 593 states and 666 transitions. Second operand has 76 states, 76 states have (on average 2.986842105263158) internal successors, (227), 75 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:22,098 INFO L93 Difference]: Finished difference Result 974 states and 1123 transitions. [2022-01-31 19:59:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:59:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.986842105263158) internal successors, (227), 75 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 19:59:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:22,100 INFO L225 Difference]: With dead ends: 974 [2022-01-31 19:59:22,100 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 19:59:22,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:59:22,102 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 814 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:22,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 194 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 19:59:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 601. [2022-01-31 19:59:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 523 states have (on average 1.005736137667304) internal successors, (526), 523 states have internal predecessors, (526), 75 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-01-31 19:59:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 675 transitions. [2022-01-31 19:59:22,291 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 675 transitions. Word has length 231 [2022-01-31 19:59:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:22,292 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 675 transitions. [2022-01-31 19:59:22,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.986842105263158) internal successors, (227), 75 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 675 transitions. [2022-01-31 19:59:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 19:59:22,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:22,293 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:22,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:59:22,293 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash -551944925, now seen corresponding path program 72 times [2022-01-31 19:59:22,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:22,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787696189] [2022-01-31 19:59:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:22,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:22,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:22,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:22,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:24,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:24,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:24,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787696189] [2022-01-31 19:59:24,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787696189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:24,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:24,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:59:24,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390684130] [2022-01-31 19:59:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:24,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:59:24,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:59:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:59:24,139 INFO L87 Difference]: Start difference. First operand 601 states and 675 transitions. Second operand has 77 states, 77 states have (on average 2.987012987012987) internal successors, (230), 76 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:25,431 INFO L93 Difference]: Finished difference Result 987 states and 1138 transitions. [2022-01-31 19:59:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:59:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.987012987012987) internal successors, (230), 76 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-01-31 19:59:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:25,433 INFO L225 Difference]: With dead ends: 987 [2022-01-31 19:59:25,433 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 19:59:25,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:59:25,435 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1034 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:25,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 186 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 19:59:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 609. [2022-01-31 19:59:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 530 states have (on average 1.0056603773584907) internal successors, (533), 530 states have internal predecessors, (533), 76 states have call successors, (76), 3 states have call predecessors, (76), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-01-31 19:59:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 684 transitions. [2022-01-31 19:59:25,628 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 684 transitions. Word has length 234 [2022-01-31 19:59:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:25,628 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 684 transitions. [2022-01-31 19:59:25,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.987012987012987) internal successors, (230), 76 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 684 transitions. [2022-01-31 19:59:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 19:59:25,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:25,629 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:25,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:59:25,629 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash 15179278, now seen corresponding path program 73 times [2022-01-31 19:59:25,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304530327] [2022-01-31 19:59:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:25,631 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:25,631 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:25,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:25,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:27,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304530327] [2022-01-31 19:59:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304530327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:27,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:27,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:59:27,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017515499] [2022-01-31 19:59:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:27,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:59:27,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:59:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:59:27,515 INFO L87 Difference]: Start difference. First operand 609 states and 684 transitions. Second operand has 78 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 77 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:28,881 INFO L93 Difference]: Finished difference Result 1000 states and 1153 transitions. [2022-01-31 19:59:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:59:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 77 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-01-31 19:59:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:28,883 INFO L225 Difference]: With dead ends: 1000 [2022-01-31 19:59:28,883 INFO L226 Difference]: Without dead ends: 621 [2022-01-31 19:59:28,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:59:28,885 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 813 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:28,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 198 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-31 19:59:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 617. [2022-01-31 19:59:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 537 states have (on average 1.005586592178771) internal successors, (540), 537 states have internal predecessors, (540), 77 states have call successors, (77), 3 states have call predecessors, (77), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-01-31 19:59:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 693 transitions. [2022-01-31 19:59:29,085 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 693 transitions. Word has length 237 [2022-01-31 19:59:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:29,085 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 693 transitions. [2022-01-31 19:59:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 77 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 693 transitions. [2022-01-31 19:59:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 19:59:29,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:29,087 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:29,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:59:29,087 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1189031613, now seen corresponding path program 74 times [2022-01-31 19:59:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:29,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728476477] [2022-01-31 19:59:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:29,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:29,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:29,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:29,092 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:30,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:30,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:30,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728476477] [2022-01-31 19:59:30,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [728476477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:30,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:30,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:59:30,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440472634] [2022-01-31 19:59:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:30,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:59:30,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:30,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:59:30,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:59:30,978 INFO L87 Difference]: Start difference. First operand 617 states and 693 transitions. Second operand has 79 states, 79 states have (on average 2.9873417721518987) internal successors, (236), 78 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:32,382 INFO L93 Difference]: Finished difference Result 1013 states and 1168 transitions. [2022-01-31 19:59:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:59:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9873417721518987) internal successors, (236), 78 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2022-01-31 19:59:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:32,385 INFO L225 Difference]: With dead ends: 1013 [2022-01-31 19:59:32,385 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 19:59:32,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:59:32,387 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 940 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:32,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 205 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 19:59:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2022-01-31 19:59:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 544 states have (on average 1.005514705882353) internal successors, (547), 544 states have internal predecessors, (547), 78 states have call successors, (78), 3 states have call predecessors, (78), 2 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 19:59:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 702 transitions. [2022-01-31 19:59:32,596 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 702 transitions. Word has length 240 [2022-01-31 19:59:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:32,596 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 702 transitions. [2022-01-31 19:59:32,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9873417721518987) internal successors, (236), 78 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 702 transitions. [2022-01-31 19:59:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 19:59:32,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:32,597 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:32,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:59:32,597 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 26138094, now seen corresponding path program 75 times [2022-01-31 19:59:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:32,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342536646] [2022-01-31 19:59:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:32,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:32,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:32,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:32,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,588 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 19:59:34,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342536646] [2022-01-31 19:59:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342536646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:34,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:59:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023019587] [2022-01-31 19:59:34,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:59:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:59:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:59:34,590 INFO L87 Difference]: Start difference. First operand 625 states and 702 transitions. Second operand has 80 states, 80 states have (on average 2.9875) internal successors, (239), 79 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:36,092 INFO L93 Difference]: Finished difference Result 1026 states and 1183 transitions. [2022-01-31 19:59:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 19:59:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.9875) internal successors, (239), 79 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 19:59:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:36,095 INFO L225 Difference]: With dead ends: 1026 [2022-01-31 19:59:36,095 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 19:59:36,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:59:36,097 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 926 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:36,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 207 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 19:59:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 633. [2022-01-31 19:59:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 551 states have (on average 1.0054446460980035) internal successors, (554), 551 states have internal predecessors, (554), 79 states have call successors, (79), 3 states have call predecessors, (79), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 19:59:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 711 transitions. [2022-01-31 19:59:36,330 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 711 transitions. Word has length 243 [2022-01-31 19:59:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:36,330 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 711 transitions. [2022-01-31 19:59:36,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.9875) internal successors, (239), 79 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 711 transitions. [2022-01-31 19:59:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 19:59:36,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:36,331 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:36,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:59:36,331 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1132458653, now seen corresponding path program 76 times [2022-01-31 19:59:36,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477334952] [2022-01-31 19:59:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:36,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:36,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:36,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:36,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:38,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:38,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477334952] [2022-01-31 19:59:38,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477334952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:38,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:38,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:59:38,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922708771] [2022-01-31 19:59:38,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:38,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:59:38,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:38,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:59:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:59:38,357 INFO L87 Difference]: Start difference. First operand 633 states and 711 transitions. Second operand has 81 states, 81 states have (on average 2.9876543209876543) internal successors, (242), 80 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:39,867 INFO L93 Difference]: Finished difference Result 1039 states and 1198 transitions. [2022-01-31 19:59:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:59:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9876543209876543) internal successors, (242), 80 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 19:59:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:39,870 INFO L225 Difference]: With dead ends: 1039 [2022-01-31 19:59:39,870 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 19:59:39,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:59:39,873 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1026 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:39,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 189 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 19:59:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 641. [2022-01-31 19:59:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 558 states have (on average 1.0053763440860215) internal successors, (561), 558 states have internal predecessors, (561), 80 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 19:59:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 720 transitions. [2022-01-31 19:59:40,135 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 720 transitions. Word has length 246 [2022-01-31 19:59:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:40,135 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 720 transitions. [2022-01-31 19:59:40,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9876543209876543) internal successors, (242), 80 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 720 transitions. [2022-01-31 19:59:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 19:59:40,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:40,136 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:40,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:59:40,137 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1764009422, now seen corresponding path program 77 times [2022-01-31 19:59:40,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:40,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709257914] [2022-01-31 19:59:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:40,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:40,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:40,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:40,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:42,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:42,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709257914] [2022-01-31 19:59:42,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [709257914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:42,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:42,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:59:42,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792322943] [2022-01-31 19:59:42,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:42,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:59:42,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:42,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:59:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:59:42,222 INFO L87 Difference]: Start difference. First operand 641 states and 720 transitions. Second operand has 82 states, 82 states have (on average 2.9878048780487805) internal successors, (245), 81 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:43,710 INFO L93 Difference]: Finished difference Result 1052 states and 1213 transitions. [2022-01-31 19:59:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:59:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.9878048780487805) internal successors, (245), 81 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 19:59:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:43,712 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 19:59:43,712 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 19:59:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:59:43,715 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 904 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 216 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 19:59:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 649. [2022-01-31 19:59:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 565 states have (on average 1.0053097345132744) internal successors, (568), 565 states have internal predecessors, (568), 81 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 19:59:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 729 transitions. [2022-01-31 19:59:43,945 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 729 transitions. Word has length 249 [2022-01-31 19:59:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:43,945 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 729 transitions. [2022-01-31 19:59:43,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.9878048780487805) internal successors, (245), 81 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 729 transitions. [2022-01-31 19:59:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 19:59:43,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:43,946 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:43,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:59:43,947 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:43,947 INFO L85 PathProgramCache]: Analyzing trace with hash 256487811, now seen corresponding path program 78 times [2022-01-31 19:59:43,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:43,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404104279] [2022-01-31 19:59:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:43,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:43,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:43,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:43,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:46,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:46,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:46,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404104279] [2022-01-31 19:59:46,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404104279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:46,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:46,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:59:46,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505249568] [2022-01-31 19:59:46,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:46,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:59:46,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:59:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:59:46,120 INFO L87 Difference]: Start difference. First operand 649 states and 729 transitions. Second operand has 83 states, 83 states have (on average 2.9879518072289155) internal successors, (248), 82 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:47,845 INFO L93 Difference]: Finished difference Result 1065 states and 1228 transitions. [2022-01-31 19:59:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:59:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9879518072289155) internal successors, (248), 82 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2022-01-31 19:59:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:47,847 INFO L225 Difference]: With dead ends: 1065 [2022-01-31 19:59:47,847 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 19:59:47,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:59:47,849 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1154 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:47,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 193 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 19:59:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 657. [2022-01-31 19:59:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 572 states have (on average 1.0052447552447552) internal successors, (575), 572 states have internal predecessors, (575), 82 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 19:59:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 738 transitions. [2022-01-31 19:59:48,095 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 738 transitions. Word has length 252 [2022-01-31 19:59:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:48,095 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 738 transitions. [2022-01-31 19:59:48,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9879518072289155) internal successors, (248), 82 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 738 transitions. [2022-01-31 19:59:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 19:59:48,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:48,096 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:48,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:59:48,097 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2141778514, now seen corresponding path program 79 times [2022-01-31 19:59:48,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:48,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450794588] [2022-01-31 19:59:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:48,098 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:48,098 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:48,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:48,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:50,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:50,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:50,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450794588] [2022-01-31 19:59:50,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [450794588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:50,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:50,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:59:50,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277914546] [2022-01-31 19:59:50,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:50,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:59:50,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:59:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:59:50,317 INFO L87 Difference]: Start difference. First operand 657 states and 738 transitions. Second operand has 84 states, 84 states have (on average 2.988095238095238) internal successors, (251), 83 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:51,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:51,949 INFO L93 Difference]: Finished difference Result 1078 states and 1243 transitions. [2022-01-31 19:59:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:59:51,950 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.988095238095238) internal successors, (251), 83 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 19:59:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:51,952 INFO L225 Difference]: With dead ends: 1078 [2022-01-31 19:59:51,952 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 19:59:51,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:59:51,955 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1047 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:51,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 200 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 19:59:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 665. [2022-01-31 19:59:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 579 states have (on average 1.005181347150259) internal successors, (582), 579 states have internal predecessors, (582), 83 states have call successors, (83), 3 states have call predecessors, (83), 2 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 19:59:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 747 transitions. [2022-01-31 19:59:52,227 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 747 transitions. Word has length 255 [2022-01-31 19:59:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:52,227 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 747 transitions. [2022-01-31 19:59:52,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.988095238095238) internal successors, (251), 83 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 747 transitions. [2022-01-31 19:59:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 19:59:52,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:52,228 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:52,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:59:52,229 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:52,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2112897629, now seen corresponding path program 80 times [2022-01-31 19:59:52,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:52,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461338872] [2022-01-31 19:59:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:52,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:52,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:52,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:52,235 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:54,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:54,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461338872] [2022-01-31 19:59:54,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [461338872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:54,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:54,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:59:54,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796237432] [2022-01-31 19:59:54,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:59:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:59:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:59:54,511 INFO L87 Difference]: Start difference. First operand 665 states and 747 transitions. Second operand has 85 states, 85 states have (on average 2.988235294117647) internal successors, (254), 84 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:56,123 INFO L93 Difference]: Finished difference Result 1091 states and 1258 transitions. [2022-01-31 19:59:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:59:56,123 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.988235294117647) internal successors, (254), 84 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2022-01-31 19:59:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:56,125 INFO L225 Difference]: With dead ends: 1091 [2022-01-31 19:59:56,126 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 19:59:56,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:59:56,128 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 880 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:56,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 217 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 19:59:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 673. [2022-01-31 19:59:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 586 states have (on average 1.0051194539249146) internal successors, (589), 586 states have internal predecessors, (589), 84 states have call successors, (84), 3 states have call predecessors, (84), 2 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 19:59:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 756 transitions. [2022-01-31 19:59:56,382 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 756 transitions. Word has length 258 [2022-01-31 19:59:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:56,382 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 756 transitions. [2022-01-31 19:59:56,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.988235294117647) internal successors, (254), 84 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 756 transitions. [2022-01-31 19:59:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 19:59:56,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:56,383 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:56,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:59:56,383 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -715911794, now seen corresponding path program 81 times [2022-01-31 19:59:56,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:56,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473012567] [2022-01-31 19:59:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:56,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:56,386 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:59:56,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:56,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:58,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:58,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473012567] [2022-01-31 19:59:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473012567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:58,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:58,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 19:59:58,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182281128] [2022-01-31 19:59:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:58,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 19:59:58,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:58,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 19:59:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:59:58,683 INFO L87 Difference]: Start difference. First operand 673 states and 756 transitions. Second operand has 86 states, 86 states have (on average 2.988372093023256) internal successors, (257), 85 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:00,443 INFO L93 Difference]: Finished difference Result 1104 states and 1273 transitions. [2022-01-31 20:00:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 20:00:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.988372093023256) internal successors, (257), 85 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 20:00:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:00,446 INFO L225 Difference]: With dead ends: 1104 [2022-01-31 20:00:00,446 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 20:00:00,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:00:00,448 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 932 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:00,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 239 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:00:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 20:00:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 681. [2022-01-31 20:00:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 593 states have (on average 1.0050590219224282) internal successors, (596), 593 states have internal predecessors, (596), 85 states have call successors, (85), 3 states have call predecessors, (85), 2 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-01-31 20:00:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 765 transitions. [2022-01-31 20:00:00,710 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 765 transitions. Word has length 261 [2022-01-31 20:00:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:00,710 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 765 transitions. [2022-01-31 20:00:00,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.988372093023256) internal successors, (257), 85 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 765 transitions. [2022-01-31 20:00:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-31 20:00:00,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:00,712 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:00,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 20:00:00,712 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1343999549, now seen corresponding path program 82 times [2022-01-31 20:00:00,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:00,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936140507] [2022-01-31 20:00:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:00,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:00,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:00,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:00,719 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:03,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:03,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936140507] [2022-01-31 20:00:03,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936140507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:03,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:03,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 20:00:03,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549286291] [2022-01-31 20:00:03,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:03,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 20:00:03,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:03,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 20:00:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:00:03,173 INFO L87 Difference]: Start difference. First operand 681 states and 765 transitions. Second operand has 87 states, 87 states have (on average 2.9885057471264367) internal successors, (260), 86 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:05,098 INFO L93 Difference]: Finished difference Result 1117 states and 1288 transitions. [2022-01-31 20:00:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 20:00:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9885057471264367) internal successors, (260), 86 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-01-31 20:00:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:05,101 INFO L225 Difference]: With dead ends: 1117 [2022-01-31 20:00:05,101 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 20:00:05,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:00:05,103 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1065 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:05,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 206 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 20:00:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 689. [2022-01-31 20:00:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 600 states have (on average 1.005) internal successors, (603), 600 states have internal predecessors, (603), 86 states have call successors, (86), 3 states have call predecessors, (86), 2 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 20:00:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 774 transitions. [2022-01-31 20:00:05,402 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 774 transitions. Word has length 264 [2022-01-31 20:00:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:05,402 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 774 transitions. [2022-01-31 20:00:05,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9885057471264367) internal successors, (260), 86 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 774 transitions. [2022-01-31 20:00:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 20:00:05,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:05,404 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:05,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 20:00:05,404 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash 466199918, now seen corresponding path program 83 times [2022-01-31 20:00:05,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:05,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532276269] [2022-01-31 20:00:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:05,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:05,406 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:05,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:05,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:07,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:07,931 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:07,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532276269] [2022-01-31 20:00:07,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532276269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:07,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:07,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 20:00:07,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809409123] [2022-01-31 20:00:07,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 20:00:07,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 20:00:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:00:07,933 INFO L87 Difference]: Start difference. First operand 689 states and 774 transitions. Second operand has 88 states, 88 states have (on average 2.9886363636363638) internal successors, (263), 87 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:09,736 INFO L93 Difference]: Finished difference Result 1130 states and 1303 transitions. [2022-01-31 20:00:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 20:00:09,736 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.9886363636363638) internal successors, (263), 87 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 20:00:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:09,738 INFO L225 Difference]: With dead ends: 1130 [2022-01-31 20:00:09,738 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 20:00:09,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:00:09,740 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1168 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:09,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1253 Valid, 228 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:00:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 20:00:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 697. [2022-01-31 20:00:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 607 states have (on average 1.0049423393739703) internal successors, (610), 607 states have internal predecessors, (610), 87 states have call successors, (87), 3 states have call predecessors, (87), 2 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-31 20:00:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 783 transitions. [2022-01-31 20:00:10,022 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 783 transitions. Word has length 267 [2022-01-31 20:00:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:10,022 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 783 transitions. [2022-01-31 20:00:10,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.9886363636363638) internal successors, (263), 87 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 783 transitions. [2022-01-31 20:00:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 20:00:10,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:10,023 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:10,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 20:00:10,024 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 509152739, now seen corresponding path program 84 times [2022-01-31 20:00:10,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:10,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286676029] [2022-01-31 20:00:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:10,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:10,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:10,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:10,030 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:12,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:12,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286676029] [2022-01-31 20:00:12,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [286676029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:12,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:12,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 20:00:12,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051487715] [2022-01-31 20:00:12,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:12,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 20:00:12,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:12,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 20:00:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:00:12,460 INFO L87 Difference]: Start difference. First operand 697 states and 783 transitions. Second operand has 89 states, 89 states have (on average 2.9887640449438204) internal successors, (266), 88 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:14,350 INFO L93 Difference]: Finished difference Result 1143 states and 1318 transitions. [2022-01-31 20:00:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 20:00:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9887640449438204) internal successors, (266), 88 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 20:00:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:14,352 INFO L225 Difference]: With dead ends: 1143 [2022-01-31 20:00:14,352 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 20:00:14,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:00:14,354 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1118 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:14,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 210 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:00:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 20:00:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 705. [2022-01-31 20:00:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 614 states have (on average 1.004885993485342) internal successors, (617), 614 states have internal predecessors, (617), 88 states have call successors, (88), 3 states have call predecessors, (88), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-01-31 20:00:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 792 transitions. [2022-01-31 20:00:14,654 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 792 transitions. Word has length 270 [2022-01-31 20:00:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 792 transitions. [2022-01-31 20:00:14,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9887640449438204) internal successors, (266), 88 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 792 transitions. [2022-01-31 20:00:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 20:00:14,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:14,655 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:14,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 20:00:14,656 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:14,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 216388942, now seen corresponding path program 85 times [2022-01-31 20:00:14,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:14,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079062085] [2022-01-31 20:00:14,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:14,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:14,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:14,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:14,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:17,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079062085] [2022-01-31 20:00:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079062085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:17,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:17,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 20:00:17,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947420947] [2022-01-31 20:00:17,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:17,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 20:00:17,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 20:00:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:00:17,199 INFO L87 Difference]: Start difference. First operand 705 states and 792 transitions. Second operand has 90 states, 90 states have (on average 2.988888888888889) internal successors, (269), 89 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:19,215 INFO L93 Difference]: Finished difference Result 1156 states and 1333 transitions. [2022-01-31 20:00:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 20:00:19,216 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.988888888888889) internal successors, (269), 89 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 20:00:19,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:19,217 INFO L225 Difference]: With dead ends: 1156 [2022-01-31 20:00:19,217 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 20:00:19,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:00:19,219 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1050 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:19,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 212 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 20:00:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 713. [2022-01-31 20:00:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 621 states have (on average 1.0048309178743962) internal successors, (624), 621 states have internal predecessors, (624), 89 states have call successors, (89), 3 states have call predecessors, (89), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-31 20:00:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 801 transitions. [2022-01-31 20:00:19,563 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 801 transitions. Word has length 273 [2022-01-31 20:00:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:19,564 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 801 transitions. [2022-01-31 20:00:19,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.988888888888889) internal successors, (269), 89 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 801 transitions. [2022-01-31 20:00:19,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-01-31 20:00:19,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:19,565 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:19,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 20:00:19,565 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1568690691, now seen corresponding path program 86 times [2022-01-31 20:00:19,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263085340] [2022-01-31 20:00:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:19,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:19,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:19,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:19,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:22,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:22,142 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263085340] [2022-01-31 20:00:22,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263085340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:22,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:22,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 20:00:22,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242643405] [2022-01-31 20:00:22,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:22,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 20:00:22,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 20:00:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 20:00:22,145 INFO L87 Difference]: Start difference. First operand 713 states and 801 transitions. Second operand has 91 states, 91 states have (on average 2.989010989010989) internal successors, (272), 90 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:24,142 INFO L93 Difference]: Finished difference Result 1169 states and 1348 transitions. [2022-01-31 20:00:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 20:00:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.989010989010989) internal successors, (272), 90 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2022-01-31 20:00:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:24,145 INFO L225 Difference]: With dead ends: 1169 [2022-01-31 20:00:24,145 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 20:00:24,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:00:24,147 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1333 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:24,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 214 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 20:00:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 721. [2022-01-31 20:00:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 628 states have (on average 1.0047770700636942) internal successors, (631), 628 states have internal predecessors, (631), 90 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 20:00:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 810 transitions. [2022-01-31 20:00:24,457 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 810 transitions. Word has length 276 [2022-01-31 20:00:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:24,457 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 810 transitions. [2022-01-31 20:00:24,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.989010989010989) internal successors, (272), 90 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 810 transitions. [2022-01-31 20:00:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 20:00:24,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:24,458 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:24,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 20:00:24,458 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:24,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1196858670, now seen corresponding path program 87 times [2022-01-31 20:00:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:24,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186814087] [2022-01-31 20:00:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:24,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:24,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:24,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:24,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:27,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186814087] [2022-01-31 20:00:27,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186814087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:27,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:27,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 20:00:27,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255572890] [2022-01-31 20:00:27,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:27,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 20:00:27,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 20:00:27,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:00:27,047 INFO L87 Difference]: Start difference. First operand 721 states and 810 transitions. Second operand has 92 states, 92 states have (on average 2.989130434782609) internal successors, (275), 91 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:29,132 INFO L93 Difference]: Finished difference Result 1182 states and 1363 transitions. [2022-01-31 20:00:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 20:00:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.989130434782609) internal successors, (275), 91 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 20:00:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:29,134 INFO L225 Difference]: With dead ends: 1182 [2022-01-31 20:00:29,134 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 20:00:29,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:00:29,136 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1166 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:29,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1255 Valid, 221 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:29,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 20:00:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 729. [2022-01-31 20:00:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 635 states have (on average 1.0047244094488188) internal successors, (638), 635 states have internal predecessors, (638), 91 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-01-31 20:00:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 819 transitions. [2022-01-31 20:00:29,484 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 819 transitions. Word has length 279 [2022-01-31 20:00:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:29,484 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 819 transitions. [2022-01-31 20:00:29,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.989130434782609) internal successors, (275), 91 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 819 transitions. [2022-01-31 20:00:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 20:00:29,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:29,488 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:29,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 20:00:29,488 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:29,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash 669777443, now seen corresponding path program 88 times [2022-01-31 20:00:29,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397929904] [2022-01-31 20:00:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:29,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:29,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:29,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:29,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:32,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:32,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:32,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397929904] [2022-01-31 20:00:32,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397929904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:32,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:32,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 20:00:32,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477824015] [2022-01-31 20:00:32,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:32,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 20:00:32,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 20:00:32,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:00:32,396 INFO L87 Difference]: Start difference. First operand 729 states and 819 transitions. Second operand has 93 states, 93 states have (on average 2.989247311827957) internal successors, (278), 92 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:34,696 INFO L93 Difference]: Finished difference Result 1195 states and 1378 transitions. [2022-01-31 20:00:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 20:00:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.989247311827957) internal successors, (278), 92 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2022-01-31 20:00:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:34,698 INFO L225 Difference]: With dead ends: 1195 [2022-01-31 20:00:34,698 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 20:00:34,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4281, Invalid=4461, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 20:00:34,699 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1470 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:34,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 218 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 20:00:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 737. [2022-01-31 20:00:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 642 states have (on average 1.0046728971962617) internal successors, (645), 642 states have internal predecessors, (645), 92 states have call successors, (92), 3 states have call predecessors, (92), 2 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 20:00:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 828 transitions. [2022-01-31 20:00:35,029 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 828 transitions. Word has length 282 [2022-01-31 20:00:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:35,030 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 828 transitions. [2022-01-31 20:00:35,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.989247311827957) internal successors, (278), 92 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 828 transitions. [2022-01-31 20:00:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 20:00:35,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:35,031 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:35,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 20:00:35,031 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash 793378062, now seen corresponding path program 89 times [2022-01-31 20:00:35,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:35,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109318989] [2022-01-31 20:00:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:35,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:35,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:35,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:35,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:37,845 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109318989] [2022-01-31 20:00:37,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109318989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:37,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:37,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 20:00:37,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463248924] [2022-01-31 20:00:37,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:37,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 20:00:37,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 20:00:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 20:00:37,848 INFO L87 Difference]: Start difference. First operand 737 states and 828 transitions. Second operand has 94 states, 94 states have (on average 2.9893617021276597) internal successors, (281), 93 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:40,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:40,571 INFO L93 Difference]: Finished difference Result 1208 states and 1393 transitions. [2022-01-31 20:00:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 20:00:40,571 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.9893617021276597) internal successors, (281), 93 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 20:00:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:40,573 INFO L225 Difference]: With dead ends: 1208 [2022-01-31 20:00:40,574 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 20:00:40,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4374, Invalid=4556, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:00:40,581 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1030 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:40,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 245 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 20:00:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 745. [2022-01-31 20:00:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 649 states have (on average 1.00462249614792) internal successors, (652), 649 states have internal predecessors, (652), 93 states have call successors, (93), 3 states have call predecessors, (93), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-01-31 20:00:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 837 transitions. [2022-01-31 20:00:41,127 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 837 transitions. Word has length 285 [2022-01-31 20:00:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:41,127 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 837 transitions. [2022-01-31 20:00:41,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.9893617021276597) internal successors, (281), 93 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 837 transitions. [2022-01-31 20:00:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-01-31 20:00:41,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:41,128 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:41,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 20:00:41,129 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2102521277, now seen corresponding path program 90 times [2022-01-31 20:00:41,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:41,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393792081] [2022-01-31 20:00:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:41,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:41,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:41,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:41,136 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:44,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:44,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:44,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393792081] [2022-01-31 20:00:44,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393792081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:44,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:44,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 20:00:44,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135317966] [2022-01-31 20:00:44,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:44,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 20:00:44,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:44,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 20:00:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:00:44,068 INFO L87 Difference]: Start difference. First operand 745 states and 837 transitions. Second operand has 95 states, 95 states have (on average 2.9894736842105263) internal successors, (284), 94 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:46,499 INFO L93 Difference]: Finished difference Result 1221 states and 1408 transitions. [2022-01-31 20:00:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 20:00:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9894736842105263) internal successors, (284), 94 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2022-01-31 20:00:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:46,502 INFO L225 Difference]: With dead ends: 1221 [2022-01-31 20:00:46,502 INFO L226 Difference]: Without dead ends: 757 [2022-01-31 20:00:46,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4468, Invalid=4652, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:00:46,505 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1106 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:46,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1198 Valid, 237 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-31 20:00:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 753. [2022-01-31 20:00:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 656 states have (on average 1.0045731707317074) internal successors, (659), 656 states have internal predecessors, (659), 94 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 20:00:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 846 transitions. [2022-01-31 20:00:47,067 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 846 transitions. Word has length 288 [2022-01-31 20:00:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:47,068 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 846 transitions. [2022-01-31 20:00:47,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9894736842105263) internal successors, (284), 94 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 846 transitions. [2022-01-31 20:00:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 20:00:47,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:47,069 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:47,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 20:00:47,069 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -831654674, now seen corresponding path program 91 times [2022-01-31 20:00:47,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:47,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173269573] [2022-01-31 20:00:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:47,071 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:47,071 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:47,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:47,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:50,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:50,138 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:50,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173269573] [2022-01-31 20:00:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173269573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:50,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:50,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 20:00:50,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42043003] [2022-01-31 20:00:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 20:00:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 20:00:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:00:50,142 INFO L87 Difference]: Start difference. First operand 753 states and 846 transitions. Second operand has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 95 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:52,473 INFO L93 Difference]: Finished difference Result 1234 states and 1423 transitions. [2022-01-31 20:00:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 20:00:52,474 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 95 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 20:00:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:52,476 INFO L225 Difference]: With dead ends: 1234 [2022-01-31 20:00:52,476 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 20:00:52,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4563, Invalid=4749, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:00:52,478 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 1203 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:52,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 229 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 20:00:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 761. [2022-01-31 20:00:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 663 states have (on average 1.004524886877828) internal successors, (666), 663 states have internal predecessors, (666), 95 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-31 20:00:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 855 transitions. [2022-01-31 20:00:52,857 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 855 transitions. Word has length 291 [2022-01-31 20:00:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:52,857 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 855 transitions. [2022-01-31 20:00:52,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9895833333333335) internal successors, (287), 95 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 855 transitions. [2022-01-31 20:00:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 20:00:52,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:52,858 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:52,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 20:00:52,858 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash -581398941, now seen corresponding path program 92 times [2022-01-31 20:00:52,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:52,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667190093] [2022-01-31 20:00:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:52,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:52,860 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:52,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:52,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:55,754 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 20:00:55,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:55,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667190093] [2022-01-31 20:00:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [667190093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:55,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 20:00:55,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987972424] [2022-01-31 20:00:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 20:00:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 20:00:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:00:55,758 INFO L87 Difference]: Start difference. First operand 761 states and 855 transitions. Second operand has 97 states, 97 states have (on average 2.9896907216494846) internal successors, (290), 96 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:58,201 INFO L93 Difference]: Finished difference Result 1247 states and 1438 transitions. [2022-01-31 20:00:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 20:00:58,202 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.9896907216494846) internal successors, (290), 96 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-01-31 20:00:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:58,204 INFO L225 Difference]: With dead ends: 1247 [2022-01-31 20:00:58,204 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 20:00:58,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:00:58,206 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1240 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:58,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 231 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:00:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 20:00:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 769. [2022-01-31 20:00:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 670 states have (on average 1.0044776119402985) internal successors, (673), 670 states have internal predecessors, (673), 96 states have call successors, (96), 3 states have call predecessors, (96), 2 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-31 20:00:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 864 transitions. [2022-01-31 20:00:58,653 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 864 transitions. Word has length 294 [2022-01-31 20:00:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:58,654 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 864 transitions. [2022-01-31 20:00:58,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.9896907216494846) internal successors, (290), 96 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 864 transitions. [2022-01-31 20:00:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 20:00:58,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:58,655 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:58,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 20:00:58,655 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1276082994, now seen corresponding path program 93 times [2022-01-31 20:00:58,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:58,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359812243] [2022-01-31 20:00:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:58,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:58,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:00:58,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:58,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:01,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:01,757 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359812243] [2022-01-31 20:01:01,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359812243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:01,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:01,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 20:01:01,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593186485] [2022-01-31 20:01:01,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:01,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 20:01:01,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:01,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 20:01:01,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:01:01,759 INFO L87 Difference]: Start difference. First operand 769 states and 864 transitions. Second operand has 98 states, 98 states have (on average 2.989795918367347) internal successors, (293), 97 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:04,385 INFO L93 Difference]: Finished difference Result 1260 states and 1453 transitions. [2022-01-31 20:01:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 20:01:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.989795918367347) internal successors, (293), 97 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-01-31 20:01:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:04,387 INFO L225 Difference]: With dead ends: 1260 [2022-01-31 20:01:04,387 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 20:01:04,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4756, Invalid=4946, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:01:04,389 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1385 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:04,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 228 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 20:01:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 777. [2022-01-31 20:01:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 677 states have (on average 1.0044313146233383) internal successors, (680), 677 states have internal predecessors, (680), 97 states have call successors, (97), 3 states have call predecessors, (97), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-31 20:01:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 873 transitions. [2022-01-31 20:01:04,911 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 873 transitions. Word has length 297 [2022-01-31 20:01:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:04,911 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 873 transitions. [2022-01-31 20:01:04,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.989795918367347) internal successors, (293), 97 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:04,912 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 873 transitions. [2022-01-31 20:01:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-01-31 20:01:04,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:04,913 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:04,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 20:01:04,913 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 838693507, now seen corresponding path program 94 times [2022-01-31 20:01:04,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:04,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204913399] [2022-01-31 20:01:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:04,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:04,922 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:04,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:04,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:08,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204913399] [2022-01-31 20:01:08,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204913399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:08,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:08,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 20:01:08,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772273868] [2022-01-31 20:01:08,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:08,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 20:01:08,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 20:01:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:01:08,460 INFO L87 Difference]: Start difference. First operand 777 states and 873 transitions. Second operand has 99 states, 99 states have (on average 2.98989898989899) internal successors, (296), 98 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:11,516 INFO L93 Difference]: Finished difference Result 1273 states and 1468 transitions. [2022-01-31 20:01:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 20:01:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.98989898989899) internal successors, (296), 98 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-01-31 20:01:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:11,519 INFO L225 Difference]: With dead ends: 1273 [2022-01-31 20:01:11,519 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 20:01:11,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4854, Invalid=5046, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:01:11,521 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1161 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:11,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 250 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:01:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 20:01:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 785. [2022-01-31 20:01:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 684 states have (on average 1.0043859649122806) internal successors, (687), 684 states have internal predecessors, (687), 98 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 20:01:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 882 transitions. [2022-01-31 20:01:12,009 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 882 transitions. Word has length 300 [2022-01-31 20:01:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:12,009 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 882 transitions. [2022-01-31 20:01:12,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.98989898989899) internal successors, (296), 98 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 882 transitions. [2022-01-31 20:01:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 20:01:12,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:12,010 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:12,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 20:01:12,010 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash -729830226, now seen corresponding path program 95 times [2022-01-31 20:01:12,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:12,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996599774] [2022-01-31 20:01:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:12,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:12,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:12,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:12,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:15,138 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996599774] [2022-01-31 20:01:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996599774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:15,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:15,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 20:01:15,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722946882] [2022-01-31 20:01:15,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:15,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 20:01:15,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 20:01:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:01:15,141 INFO L87 Difference]: Start difference. First operand 785 states and 882 transitions. Second operand has 100 states, 100 states have (on average 2.99) internal successors, (299), 99 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:17,834 INFO L93 Difference]: Finished difference Result 1286 states and 1483 transitions. [2022-01-31 20:01:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 20:01:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.99) internal successors, (299), 99 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 20:01:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:17,837 INFO L225 Difference]: With dead ends: 1286 [2022-01-31 20:01:17,837 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 20:01:17,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4953, Invalid=5147, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:01:17,839 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1624 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 1023 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:17,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1721 Valid, 222 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 20:01:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 793. [2022-01-31 20:01:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 691 states have (on average 1.004341534008683) internal successors, (694), 691 states have internal predecessors, (694), 99 states have call successors, (99), 3 states have call predecessors, (99), 2 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-01-31 20:01:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 891 transitions. [2022-01-31 20:01:18,248 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 891 transitions. Word has length 303 [2022-01-31 20:01:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:18,249 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 891 transitions. [2022-01-31 20:01:18,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.99) internal successors, (299), 99 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 891 transitions. [2022-01-31 20:01:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 20:01:18,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:18,250 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:18,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 20:01:18,250 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash 623820451, now seen corresponding path program 96 times [2022-01-31 20:01:18,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:18,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467000255] [2022-01-31 20:01:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:18,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:18,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:18,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:18,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:21,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:21,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:21,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467000255] [2022-01-31 20:01:21,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467000255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:21,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:21,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 20:01:21,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905518135] [2022-01-31 20:01:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:21,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 20:01:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 20:01:21,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:01:21,380 INFO L87 Difference]: Start difference. First operand 793 states and 891 transitions. Second operand has 101 states, 101 states have (on average 2.99009900990099) internal successors, (302), 100 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:24,467 INFO L93 Difference]: Finished difference Result 1299 states and 1498 transitions. [2022-01-31 20:01:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 20:01:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.99009900990099) internal successors, (302), 100 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2022-01-31 20:01:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:24,470 INFO L225 Difference]: With dead ends: 1299 [2022-01-31 20:01:24,470 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 20:01:24,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5053, Invalid=5249, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:01:24,472 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1289 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 244 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:01:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 20:01:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 801. [2022-01-31 20:01:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 698 states have (on average 1.004297994269341) internal successors, (701), 698 states have internal predecessors, (701), 100 states have call successors, (100), 3 states have call predecessors, (100), 2 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-01-31 20:01:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 900 transitions. [2022-01-31 20:01:25,002 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 900 transitions. Word has length 306 [2022-01-31 20:01:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:25,003 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 900 transitions. [2022-01-31 20:01:25,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.99009900990099) internal successors, (302), 100 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 900 transitions. [2022-01-31 20:01:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 20:01:25,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:25,005 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:25,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 20:01:25,006 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1783196814, now seen corresponding path program 97 times [2022-01-31 20:01:25,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:25,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765244159] [2022-01-31 20:01:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:25,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:25,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:25,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:25,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:28,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:28,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765244159] [2022-01-31 20:01:28,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765244159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:28,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:28,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 20:01:28,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035765553] [2022-01-31 20:01:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:28,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 20:01:28,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 20:01:28,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:01:28,353 INFO L87 Difference]: Start difference. First operand 801 states and 900 transitions. Second operand has 102 states, 102 states have (on average 2.9901960784313726) internal successors, (305), 101 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:31,058 INFO L93 Difference]: Finished difference Result 1312 states and 1513 transitions. [2022-01-31 20:01:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 20:01:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.9901960784313726) internal successors, (305), 101 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-01-31 20:01:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:31,064 INFO L225 Difference]: With dead ends: 1312 [2022-01-31 20:01:31,064 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 20:01:31,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5154, Invalid=5352, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:01:31,066 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1602 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:31,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 231 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 20:01:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 809. [2022-01-31 20:01:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 705 states have (on average 1.004255319148936) internal successors, (708), 705 states have internal predecessors, (708), 101 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-31 20:01:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 909 transitions. [2022-01-31 20:01:31,513 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 909 transitions. Word has length 309 [2022-01-31 20:01:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:31,513 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 909 transitions. [2022-01-31 20:01:31,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.9901960784313726) internal successors, (305), 101 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 909 transitions. [2022-01-31 20:01:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-01-31 20:01:31,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:31,514 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:31,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 20:01:31,514 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash 637432515, now seen corresponding path program 98 times [2022-01-31 20:01:31,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:31,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268716969] [2022-01-31 20:01:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:31,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:31,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:31,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:31,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:34,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:34,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:34,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268716969] [2022-01-31 20:01:34,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268716969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:34,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:34,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 20:01:34,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011624482] [2022-01-31 20:01:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:34,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 20:01:34,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 20:01:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:01:34,928 INFO L87 Difference]: Start difference. First operand 809 states and 909 transitions. Second operand has 103 states, 103 states have (on average 2.9902912621359223) internal successors, (308), 102 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:38,155 INFO L93 Difference]: Finished difference Result 1325 states and 1528 transitions. [2022-01-31 20:01:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 20:01:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.9902912621359223) internal successors, (308), 102 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2022-01-31 20:01:38,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:38,157 INFO L225 Difference]: With dead ends: 1325 [2022-01-31 20:01:38,157 INFO L226 Difference]: Without dead ends: 821 [2022-01-31 20:01:38,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:01:38,160 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1120 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:38,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 238 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:01:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-31 20:01:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 817. [2022-01-31 20:01:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 712 states have (on average 1.0042134831460674) internal successors, (715), 712 states have internal predecessors, (715), 102 states have call successors, (102), 3 states have call predecessors, (102), 2 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 20:01:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 918 transitions. [2022-01-31 20:01:38,628 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 918 transitions. Word has length 312 [2022-01-31 20:01:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:38,628 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 918 transitions. [2022-01-31 20:01:38,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.9902912621359223) internal successors, (308), 102 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 918 transitions. [2022-01-31 20:01:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 20:01:38,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:38,633 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:38,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 20:01:38,633 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -721697682, now seen corresponding path program 99 times [2022-01-31 20:01:38,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013491769] [2022-01-31 20:01:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:38,637 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:38,637 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:38,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:38,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:41,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:41,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013491769] [2022-01-31 20:01:41,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013491769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:41,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:41,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 20:01:41,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210343145] [2022-01-31 20:01:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:41,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 20:01:41,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:41,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 20:01:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:01:41,987 INFO L87 Difference]: Start difference. First operand 817 states and 918 transitions. Second operand has 104 states, 104 states have (on average 2.9903846153846154) internal successors, (311), 103 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:44,899 INFO L93 Difference]: Finished difference Result 1338 states and 1543 transitions. [2022-01-31 20:01:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 20:01:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.9903846153846154) internal successors, (311), 103 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 20:01:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:44,905 INFO L225 Difference]: With dead ends: 1338 [2022-01-31 20:01:44,905 INFO L226 Difference]: Without dead ends: 829 [2022-01-31 20:01:44,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:01:44,908 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1337 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:44,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 245 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-31 20:01:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 825. [2022-01-31 20:01:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 719 states have (on average 1.004172461752434) internal successors, (722), 719 states have internal predecessors, (722), 103 states have call successors, (103), 3 states have call predecessors, (103), 2 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-01-31 20:01:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 927 transitions. [2022-01-31 20:01:45,415 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 927 transitions. Word has length 315 [2022-01-31 20:01:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:45,415 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 927 transitions. [2022-01-31 20:01:45,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.9903846153846154) internal successors, (311), 103 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 927 transitions. [2022-01-31 20:01:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 20:01:45,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:45,417 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:45,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 20:01:45,417 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:45,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1912697117, now seen corresponding path program 100 times [2022-01-31 20:01:45,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:45,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040690771] [2022-01-31 20:01:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:45,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:45,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:45,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:45,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:48,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:48,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:48,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040690771] [2022-01-31 20:01:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040690771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:48,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 20:01:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342365162] [2022-01-31 20:01:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:48,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 20:01:48,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 20:01:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 20:01:48,793 INFO L87 Difference]: Start difference. First operand 825 states and 927 transitions. Second operand has 105 states, 105 states have (on average 2.9904761904761905) internal successors, (314), 104 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:51,878 INFO L93 Difference]: Finished difference Result 1351 states and 1558 transitions. [2022-01-31 20:01:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 20:01:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.9904761904761905) internal successors, (314), 104 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-01-31 20:01:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:51,881 INFO L225 Difference]: With dead ends: 1351 [2022-01-31 20:01:51,881 INFO L226 Difference]: Without dead ends: 837 [2022-01-31 20:01:51,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:01:51,884 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1248 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:51,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 247 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-31 20:01:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 833. [2022-01-31 20:01:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 726 states have (on average 1.0041322314049588) internal successors, (729), 726 states have internal predecessors, (729), 104 states have call successors, (104), 3 states have call predecessors, (104), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-31 20:01:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 936 transitions. [2022-01-31 20:01:52,446 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 936 transitions. Word has length 318 [2022-01-31 20:01:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:52,446 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 936 transitions. [2022-01-31 20:01:52,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.9904761904761905) internal successors, (314), 104 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 936 transitions. [2022-01-31 20:01:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 20:01:52,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:52,447 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:52,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 20:01:52,448 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2042934350, now seen corresponding path program 101 times [2022-01-31 20:01:52,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:52,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802715590] [2022-01-31 20:01:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:52,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:52,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:52,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:52,455 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:55,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:55,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:55,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802715590] [2022-01-31 20:01:55,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802715590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:55,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:55,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 20:01:55,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238489272] [2022-01-31 20:01:55,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:55,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 20:01:55,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 20:01:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:01:55,875 INFO L87 Difference]: Start difference. First operand 833 states and 936 transitions. Second operand has 106 states, 106 states have (on average 2.990566037735849) internal successors, (317), 105 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:58,953 INFO L93 Difference]: Finished difference Result 1364 states and 1573 transitions. [2022-01-31 20:01:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 20:01:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.990566037735849) internal successors, (317), 105 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-01-31 20:01:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:58,956 INFO L225 Difference]: With dead ends: 1364 [2022-01-31 20:01:58,957 INFO L226 Difference]: Without dead ends: 845 [2022-01-31 20:01:58,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5568, Invalid=5774, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:01:58,960 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1060 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:58,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 269 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-31 20:01:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 841. [2022-01-31 20:01:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 733 states have (on average 1.004092769440655) internal successors, (736), 733 states have internal predecessors, (736), 105 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-31 20:01:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 945 transitions. [2022-01-31 20:01:59,512 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 945 transitions. Word has length 321 [2022-01-31 20:01:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 945 transitions. [2022-01-31 20:01:59,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.990566037735849) internal successors, (317), 105 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 945 transitions. [2022-01-31 20:01:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-31 20:01:59,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:59,514 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:59,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 20:01:59,514 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1052699901, now seen corresponding path program 102 times [2022-01-31 20:01:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979933598] [2022-01-31 20:01:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:59,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:59,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:01:59,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:59,522 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:03,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:03,053 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 20:02:03,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:03,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979933598] [2022-01-31 20:02:03,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979933598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:03,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:03,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 20:02:03,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621443261] [2022-01-31 20:02:03,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 20:02:03,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 20:02:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:02:03,058 INFO L87 Difference]: Start difference. First operand 841 states and 945 transitions. Second operand has 107 states, 107 states have (on average 2.9906542056074765) internal successors, (320), 106 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:05,939 INFO L93 Difference]: Finished difference Result 1377 states and 1588 transitions. [2022-01-31 20:02:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 20:02:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.9906542056074765) internal successors, (320), 106 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324 [2022-01-31 20:02:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:05,942 INFO L225 Difference]: With dead ends: 1377 [2022-01-31 20:02:05,942 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 20:02:05,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5674, Invalid=5882, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:02:05,944 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 1481 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:05,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 251 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 20:02:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 849. [2022-01-31 20:02:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 740 states have (on average 1.0040540540540541) internal successors, (743), 740 states have internal predecessors, (743), 106 states have call successors, (106), 3 states have call predecessors, (106), 2 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-31 20:02:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 954 transitions. [2022-01-31 20:02:06,446 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 954 transitions. Word has length 324 [2022-01-31 20:02:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:06,446 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 954 transitions. [2022-01-31 20:02:06,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.9906542056074765) internal successors, (320), 106 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 954 transitions. [2022-01-31 20:02:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 20:02:06,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:06,448 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:06,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 20:02:06,448 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1554891730, now seen corresponding path program 103 times [2022-01-31 20:02:06,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676542001] [2022-01-31 20:02:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:06,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:06,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:06,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:06,455 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:09,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:09,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676542001] [2022-01-31 20:02:09,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676542001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:09,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:09,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 20:02:09,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759755140] [2022-01-31 20:02:09,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:09,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 20:02:09,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 20:02:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:02:09,973 INFO L87 Difference]: Start difference. First operand 849 states and 954 transitions. Second operand has 108 states, 108 states have (on average 2.990740740740741) internal successors, (323), 107 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:13,215 INFO L93 Difference]: Finished difference Result 1390 states and 1603 transitions. [2022-01-31 20:02:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 20:02:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.990740740740741) internal successors, (323), 107 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 20:02:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:13,218 INFO L225 Difference]: With dead ends: 1390 [2022-01-31 20:02:13,218 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 20:02:13,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5781, Invalid=5991, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:02:13,221 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 1404 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:13,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1509 Valid, 253 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 20:02:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 857. [2022-01-31 20:02:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 747 states have (on average 1.0040160642570282) internal successors, (750), 747 states have internal predecessors, (750), 107 states have call successors, (107), 3 states have call predecessors, (107), 2 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 20:02:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 963 transitions. [2022-01-31 20:02:13,791 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 963 transitions. Word has length 327 [2022-01-31 20:02:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:13,791 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 963 transitions. [2022-01-31 20:02:13,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.990740740740741) internal successors, (323), 107 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 963 transitions. [2022-01-31 20:02:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 20:02:13,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:13,792 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:13,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 20:02:13,792 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1314389795, now seen corresponding path program 104 times [2022-01-31 20:02:13,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:13,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783415417] [2022-01-31 20:02:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:13,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:13,794 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:13,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:13,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:17,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:17,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783415417] [2022-01-31 20:02:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783415417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:17,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:17,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 20:02:17,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854374342] [2022-01-31 20:02:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:17,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 20:02:17,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 20:02:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:02:17,435 INFO L87 Difference]: Start difference. First operand 857 states and 963 transitions. Second operand has 109 states, 109 states have (on average 2.9908256880733943) internal successors, (326), 108 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:20,479 INFO L93 Difference]: Finished difference Result 1403 states and 1618 transitions. [2022-01-31 20:02:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 20:02:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.9908256880733943) internal successors, (326), 108 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-01-31 20:02:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:20,481 INFO L225 Difference]: With dead ends: 1403 [2022-01-31 20:02:20,482 INFO L226 Difference]: Without dead ends: 869 [2022-01-31 20:02:20,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5889, Invalid=6101, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:02:20,483 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 1312 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:20,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1418 Valid, 260 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-01-31 20:02:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 865. [2022-01-31 20:02:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 754 states have (on average 1.0039787798408488) internal successors, (757), 754 states have internal predecessors, (757), 108 states have call successors, (108), 3 states have call predecessors, (108), 2 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-01-31 20:02:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 972 transitions. [2022-01-31 20:02:21,004 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 972 transitions. Word has length 330 [2022-01-31 20:02:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:21,004 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 972 transitions. [2022-01-31 20:02:21,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.9908256880733943) internal successors, (326), 108 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 972 transitions. [2022-01-31 20:02:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 20:02:21,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:21,005 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:21,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 20:02:21,005 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:21,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1641176078, now seen corresponding path program 105 times [2022-01-31 20:02:21,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:21,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794013997] [2022-01-31 20:02:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:21,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:21,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:21,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:21,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:24,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:24,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:24,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794013997] [2022-01-31 20:02:24,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [794013997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:24,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:24,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 20:02:24,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38226242] [2022-01-31 20:02:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:24,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 20:02:24,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 20:02:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:02:24,652 INFO L87 Difference]: Start difference. First operand 865 states and 972 transitions. Second operand has 110 states, 110 states have (on average 2.9909090909090907) internal successors, (329), 109 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:27,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:27,967 INFO L93 Difference]: Finished difference Result 1416 states and 1633 transitions. [2022-01-31 20:02:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 20:02:27,967 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.9909090909090907) internal successors, (329), 109 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 333 [2022-01-31 20:02:27,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:27,969 INFO L225 Difference]: With dead ends: 1416 [2022-01-31 20:02:27,969 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 20:02:27,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5998, Invalid=6212, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:02:27,970 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1616 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 1010 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:27,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 252 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1010 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:02:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 20:02:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 873. [2022-01-31 20:02:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 761 states have (on average 1.0039421813403417) internal successors, (764), 761 states have internal predecessors, (764), 109 states have call successors, (109), 3 states have call predecessors, (109), 2 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:02:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 981 transitions. [2022-01-31 20:02:28,502 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 981 transitions. Word has length 333 [2022-01-31 20:02:28,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:28,503 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 981 transitions. [2022-01-31 20:02:28,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.9909090909090907) internal successors, (329), 109 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 981 transitions. [2022-01-31 20:02:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-01-31 20:02:28,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:28,503 INFO L514 BasicCegarLoop]: trace histogram [108, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:28,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 20:02:28,504 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash 240472899, now seen corresponding path program 106 times [2022-01-31 20:02:28,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330084092] [2022-01-31 20:02:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:28,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:28,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:28,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:28,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:32,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:32,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330084092] [2022-01-31 20:02:32,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [330084092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:32,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 20:02:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377382555] [2022-01-31 20:02:32,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 20:02:32,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 20:02:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:02:32,199 INFO L87 Difference]: Start difference. First operand 873 states and 981 transitions. Second operand has 111 states, 111 states have (on average 2.990990990990991) internal successors, (332), 110 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:35,705 INFO L93 Difference]: Finished difference Result 1429 states and 1648 transitions. [2022-01-31 20:02:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 20:02:35,705 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.990990990990991) internal successors, (332), 110 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 336 [2022-01-31 20:02:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:35,707 INFO L225 Difference]: With dead ends: 1429 [2022-01-31 20:02:35,707 INFO L226 Difference]: Without dead ends: 885 [2022-01-31 20:02:35,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6108, Invalid=6324, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:02:35,711 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1662 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:35,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1770 Valid, 274 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:02:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-01-31 20:02:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 881. [2022-01-31 20:02:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 768 states have (on average 1.00390625) internal successors, (771), 768 states have internal predecessors, (771), 110 states have call successors, (110), 3 states have call predecessors, (110), 2 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-01-31 20:02:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 990 transitions. [2022-01-31 20:02:36,334 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 990 transitions. Word has length 336 [2022-01-31 20:02:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:36,334 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 990 transitions. [2022-01-31 20:02:36,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.990990990990991) internal successors, (332), 110 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 990 transitions. [2022-01-31 20:02:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 20:02:36,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:36,335 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:36,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 20:02:36,336 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1794315246, now seen corresponding path program 107 times [2022-01-31 20:02:36,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900046997] [2022-01-31 20:02:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:36,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:36,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:36,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:36,343 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:40,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:40,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:40,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900046997] [2022-01-31 20:02:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900046997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:40,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:40,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 20:02:40,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853147812] [2022-01-31 20:02:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:40,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 20:02:40,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 20:02:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:02:40,178 INFO L87 Difference]: Start difference. First operand 881 states and 990 transitions. Second operand has 112 states, 112 states have (on average 2.9910714285714284) internal successors, (335), 111 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:43,423 INFO L93 Difference]: Finished difference Result 1442 states and 1663 transitions. [2022-01-31 20:02:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 20:02:43,424 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.9910714285714284) internal successors, (335), 111 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 20:02:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:43,427 INFO L225 Difference]: With dead ends: 1442 [2022-01-31 20:02:43,427 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 20:02:43,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6219, Invalid=6437, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:02:43,429 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 1441 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:43,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 271 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 20:02:44,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 889. [2022-01-31 20:02:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 775 states have (on average 1.0038709677419355) internal successors, (778), 775 states have internal predecessors, (778), 111 states have call successors, (111), 3 states have call predecessors, (111), 2 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:02:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 999 transitions. [2022-01-31 20:02:44,057 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 999 transitions. Word has length 339 [2022-01-31 20:02:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:44,057 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 999 transitions. [2022-01-31 20:02:44,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.9910714285714284) internal successors, (335), 111 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 999 transitions. [2022-01-31 20:02:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 20:02:44,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:44,058 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:44,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 20:02:44,058 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1154158435, now seen corresponding path program 108 times [2022-01-31 20:02:44,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:44,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730841060] [2022-01-31 20:02:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:44,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:44,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:44,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:44,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:47,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:47,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730841060] [2022-01-31 20:02:47,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730841060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:47,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:47,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 20:02:47,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151223912] [2022-01-31 20:02:47,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:47,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 20:02:47,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 20:02:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:02:47,920 INFO L87 Difference]: Start difference. First operand 889 states and 999 transitions. Second operand has 113 states, 113 states have (on average 2.9911504424778763) internal successors, (338), 112 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:51,226 INFO L93 Difference]: Finished difference Result 1455 states and 1678 transitions. [2022-01-31 20:02:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 20:02:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.9911504424778763) internal successors, (338), 112 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 20:02:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:51,228 INFO L225 Difference]: With dead ends: 1455 [2022-01-31 20:02:51,228 INFO L226 Difference]: Without dead ends: 901 [2022-01-31 20:02:51,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6331, Invalid=6551, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:02:51,230 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 1598 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:51,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 268 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-01-31 20:02:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 897. [2022-01-31 20:02:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 782 states have (on average 1.0038363171355498) internal successors, (785), 782 states have internal predecessors, (785), 112 states have call successors, (112), 3 states have call predecessors, (112), 2 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-01-31 20:02:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1008 transitions. [2022-01-31 20:02:51,969 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1008 transitions. Word has length 342 [2022-01-31 20:02:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1008 transitions. [2022-01-31 20:02:51,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.9911504424778763) internal successors, (338), 112 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1008 transitions. [2022-01-31 20:02:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 20:02:51,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:51,971 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:51,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 20:02:51,971 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash -102603826, now seen corresponding path program 109 times [2022-01-31 20:02:51,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675756946] [2022-01-31 20:02:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:51,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:51,973 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:02:51,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:51,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:55,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:55,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675756946] [2022-01-31 20:02:55,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675756946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:55,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:55,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 20:02:55,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138106885] [2022-01-31 20:02:55,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:55,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 20:02:55,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 20:02:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:02:55,900 INFO L87 Difference]: Start difference. First operand 897 states and 1008 transitions. Second operand has 114 states, 114 states have (on average 2.991228070175439) internal successors, (341), 113 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:59,629 INFO L93 Difference]: Finished difference Result 1468 states and 1693 transitions. [2022-01-31 20:02:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 20:02:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.991228070175439) internal successors, (341), 113 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-01-31 20:02:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:59,632 INFO L225 Difference]: With dead ends: 1468 [2022-01-31 20:02:59,632 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 20:02:59,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6444, Invalid=6666, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:02:59,635 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1620 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1012 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:59,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 265 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1012 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:02:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 20:03:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 905. [2022-01-31 20:03:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 789 states have (on average 1.0038022813688212) internal successors, (792), 789 states have internal predecessors, (792), 113 states have call successors, (113), 3 states have call predecessors, (113), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-01-31 20:03:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1017 transitions. [2022-01-31 20:03:00,266 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1017 transitions. Word has length 345 [2022-01-31 20:03:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:00,266 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1017 transitions. [2022-01-31 20:03:00,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.991228070175439) internal successors, (341), 113 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1017 transitions. [2022-01-31 20:03:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-31 20:03:00,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:00,267 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:00,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 20:03:00,267 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1077202045, now seen corresponding path program 110 times [2022-01-31 20:03:00,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:00,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909434796] [2022-01-31 20:03:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:00,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:00,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:00,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:00,275 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:04,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909434796] [2022-01-31 20:03:04,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909434796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:04,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:04,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 20:03:04,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507856] [2022-01-31 20:03:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 20:03:04,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 20:03:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:03:04,250 INFO L87 Difference]: Start difference. First operand 905 states and 1017 transitions. Second operand has 115 states, 115 states have (on average 2.991304347826087) internal successors, (344), 114 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:08,037 INFO L93 Difference]: Finished difference Result 1481 states and 1708 transitions. [2022-01-31 20:03:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 20:03:08,037 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.991304347826087) internal successors, (344), 114 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 348 [2022-01-31 20:03:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:08,040 INFO L225 Difference]: With dead ends: 1481 [2022-01-31 20:03:08,040 INFO L226 Difference]: Without dead ends: 917 [2022-01-31 20:03:08,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6558, Invalid=6782, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:03:08,045 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1306 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:08,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1418 Valid, 272 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:03:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-31 20:03:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 913. [2022-01-31 20:03:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 796 states have (on average 1.0037688442211055) internal successors, (799), 796 states have internal predecessors, (799), 114 states have call successors, (114), 3 states have call predecessors, (114), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-01-31 20:03:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1026 transitions. [2022-01-31 20:03:08,725 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1026 transitions. Word has length 348 [2022-01-31 20:03:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:08,725 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1026 transitions. [2022-01-31 20:03:08,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.991304347826087) internal successors, (344), 114 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1026 transitions. [2022-01-31 20:03:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 20:03:08,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:08,726 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:08,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 20:03:08,727 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1353823314, now seen corresponding path program 111 times [2022-01-31 20:03:08,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:08,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489559478] [2022-01-31 20:03:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:08,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:08,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:08,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:08,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:12,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489559478] [2022-01-31 20:03:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489559478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:12,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:12,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 20:03:12,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980723988] [2022-01-31 20:03:12,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:12,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 20:03:12,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 20:03:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:03:12,755 INFO L87 Difference]: Start difference. First operand 913 states and 1026 transitions. Second operand has 116 states, 116 states have (on average 2.9913793103448274) internal successors, (347), 115 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:16,099 INFO L93 Difference]: Finished difference Result 1494 states and 1723 transitions. [2022-01-31 20:03:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 20:03:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.9913793103448274) internal successors, (347), 115 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 20:03:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:16,101 INFO L225 Difference]: With dead ends: 1494 [2022-01-31 20:03:16,101 INFO L226 Difference]: Without dead ends: 925 [2022-01-31 20:03:16,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6673, Invalid=6899, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:03:16,103 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 1373 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:16,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 279 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:03:16,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-31 20:03:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 921. [2022-01-31 20:03:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 803 states have (on average 1.00373599003736) internal successors, (806), 803 states have internal predecessors, (806), 115 states have call successors, (115), 3 states have call predecessors, (115), 2 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2022-01-31 20:03:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1035 transitions. [2022-01-31 20:03:16,721 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1035 transitions. Word has length 351 [2022-01-31 20:03:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:16,722 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1035 transitions. [2022-01-31 20:03:16,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.9913793103448274) internal successors, (347), 115 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:16,722 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1035 transitions. [2022-01-31 20:03:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-31 20:03:16,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:16,723 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:16,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 20:03:16,723 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash -135807069, now seen corresponding path program 112 times [2022-01-31 20:03:16,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:16,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411477992] [2022-01-31 20:03:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:16,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:16,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:16,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:16,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:20,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:20,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:20,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411477992] [2022-01-31 20:03:20,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411477992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:20,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:20,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 20:03:20,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323632185] [2022-01-31 20:03:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:20,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 20:03:20,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:20,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 20:03:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:03:20,826 INFO L87 Difference]: Start difference. First operand 921 states and 1035 transitions. Second operand has 117 states, 117 states have (on average 2.9914529914529915) internal successors, (350), 116 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:24,629 INFO L93 Difference]: Finished difference Result 1507 states and 1738 transitions. [2022-01-31 20:03:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 20:03:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.9914529914529915) internal successors, (350), 116 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 354 [2022-01-31 20:03:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:24,630 INFO L225 Difference]: With dead ends: 1507 [2022-01-31 20:03:24,631 INFO L226 Difference]: Without dead ends: 933 [2022-01-31 20:03:24,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6789, Invalid=7017, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:03:24,632 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 1503 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:24,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1617 Valid, 276 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:03:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-31 20:03:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 929. [2022-01-31 20:03:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 810 states have (on average 1.0037037037037038) internal successors, (813), 810 states have internal predecessors, (813), 116 states have call successors, (116), 3 states have call predecessors, (116), 2 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 20:03:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1044 transitions. [2022-01-31 20:03:25,268 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1044 transitions. Word has length 354 [2022-01-31 20:03:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:25,268 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1044 transitions. [2022-01-31 20:03:25,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.9914529914529915) internal successors, (350), 116 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1044 transitions. [2022-01-31 20:03:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 20:03:25,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:25,269 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:25,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 20:03:25,269 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1902431118, now seen corresponding path program 113 times [2022-01-31 20:03:25,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:25,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381954216] [2022-01-31 20:03:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:25,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:25,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:25,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:25,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:29,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:29,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381954216] [2022-01-31 20:03:29,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381954216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:29,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:29,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 20:03:29,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599036622] [2022-01-31 20:03:29,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:29,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 20:03:29,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 20:03:29,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:03:29,458 INFO L87 Difference]: Start difference. First operand 929 states and 1044 transitions. Second operand has 118 states, 118 states have (on average 2.9915254237288136) internal successors, (353), 117 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:33,715 INFO L93 Difference]: Finished difference Result 1520 states and 1753 transitions. [2022-01-31 20:03:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 20:03:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.9915254237288136) internal successors, (353), 117 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 357 [2022-01-31 20:03:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:33,717 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 20:03:33,717 INFO L226 Difference]: Without dead ends: 941 [2022-01-31 20:03:33,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6906, Invalid=7136, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:03:33,719 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1732 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1084 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1084 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:33,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1847 Valid, 263 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1084 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:03:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-31 20:03:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 937. [2022-01-31 20:03:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 817 states have (on average 1.003671970624235) internal successors, (820), 817 states have internal predecessors, (820), 117 states have call successors, (117), 3 states have call predecessors, (117), 2 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2022-01-31 20:03:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1053 transitions. [2022-01-31 20:03:34,370 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1053 transitions. Word has length 357 [2022-01-31 20:03:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:34,370 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1053 transitions. [2022-01-31 20:03:34,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.9915254237288136) internal successors, (353), 117 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1053 transitions. [2022-01-31 20:03:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-01-31 20:03:34,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:34,371 INFO L514 BasicCegarLoop]: trace histogram [116, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:34,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 20:03:34,372 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash 808629187, now seen corresponding path program 114 times [2022-01-31 20:03:34,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283173923] [2022-01-31 20:03:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:34,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:34,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:34,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:34,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:38,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:38,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:38,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283173923] [2022-01-31 20:03:38,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [283173923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:38,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:38,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 20:03:38,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282938840] [2022-01-31 20:03:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 20:03:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 20:03:38,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:03:38,622 INFO L87 Difference]: Start difference. First operand 937 states and 1053 transitions. Second operand has 119 states, 119 states have (on average 2.991596638655462) internal successors, (356), 118 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:42,635 INFO L93 Difference]: Finished difference Result 1533 states and 1768 transitions. [2022-01-31 20:03:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 20:03:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.991596638655462) internal successors, (356), 118 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 360 [2022-01-31 20:03:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:42,638 INFO L225 Difference]: With dead ends: 1533 [2022-01-31 20:03:42,638 INFO L226 Difference]: Without dead ends: 949 [2022-01-31 20:03:42,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7024, Invalid=7256, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:03:42,640 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 1979 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:42,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 275 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:03:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-31 20:03:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 945. [2022-01-31 20:03:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 824 states have (on average 1.0036407766990292) internal successors, (827), 824 states have internal predecessors, (827), 118 states have call successors, (118), 3 states have call predecessors, (118), 2 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-01-31 20:03:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1062 transitions. [2022-01-31 20:03:43,311 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1062 transitions. Word has length 360 [2022-01-31 20:03:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:43,311 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1062 transitions. [2022-01-31 20:03:43,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.991596638655462) internal successors, (356), 118 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1062 transitions. [2022-01-31 20:03:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 20:03:43,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:43,312 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:43,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 20:03:43,313 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1272177518, now seen corresponding path program 115 times [2022-01-31 20:03:43,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168860381] [2022-01-31 20:03:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:43,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:43,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:43,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:43,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:47,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:47,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168860381] [2022-01-31 20:03:47,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168860381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:47,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:47,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 20:03:47,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213590985] [2022-01-31 20:03:47,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:47,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 20:03:47,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 20:03:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:03:47,652 INFO L87 Difference]: Start difference. First operand 945 states and 1062 transitions. Second operand has 120 states, 120 states have (on average 2.9916666666666667) internal successors, (359), 119 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:52,100 INFO L93 Difference]: Finished difference Result 1546 states and 1783 transitions. [2022-01-31 20:03:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 20:03:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.9916666666666667) internal successors, (359), 119 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 20:03:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:52,102 INFO L225 Difference]: With dead ends: 1546 [2022-01-31 20:03:52,102 INFO L226 Difference]: Without dead ends: 957 [2022-01-31 20:03:52,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7143, Invalid=7377, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:03:52,105 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 1518 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:52,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 287 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:03:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-31 20:03:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 953. [2022-01-31 20:03:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 831 states have (on average 1.0036101083032491) internal successors, (834), 831 states have internal predecessors, (834), 119 states have call successors, (119), 3 states have call predecessors, (119), 2 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2022-01-31 20:03:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1071 transitions. [2022-01-31 20:03:52,807 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1071 transitions. Word has length 363 [2022-01-31 20:03:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1071 transitions. [2022-01-31 20:03:52,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.9916666666666667) internal successors, (359), 119 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1071 transitions. [2022-01-31 20:03:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 20:03:52,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:52,809 INFO L514 BasicCegarLoop]: trace histogram [118, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:52,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 20:03:52,809 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1774317597, now seen corresponding path program 116 times [2022-01-31 20:03:52,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:52,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668821022] [2022-01-31 20:03:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:52,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:52,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:03:52,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:52,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:57,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:57,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668821022] [2022-01-31 20:03:57,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668821022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:57,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:57,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 20:03:57,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314705182] [2022-01-31 20:03:57,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 20:03:57,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 20:03:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:03:57,206 INFO L87 Difference]: Start difference. First operand 953 states and 1071 transitions. Second operand has 121 states, 121 states have (on average 2.9917355371900825) internal successors, (362), 120 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:01,528 INFO L93 Difference]: Finished difference Result 1559 states and 1798 transitions. [2022-01-31 20:04:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 20:04:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.9917355371900825) internal successors, (362), 120 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 20:04:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:01,531 INFO L225 Difference]: With dead ends: 1559 [2022-01-31 20:04:01,531 INFO L226 Difference]: Without dead ends: 965 [2022-01-31 20:04:01,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7263, Invalid=7499, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:04:01,532 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 1360 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:01,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 284 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-31 20:04:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 961. [2022-01-31 20:04:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 838 states have (on average 1.003579952267303) internal successors, (841), 838 states have internal predecessors, (841), 120 states have call successors, (120), 3 states have call predecessors, (120), 2 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2022-01-31 20:04:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1080 transitions. [2022-01-31 20:04:02,236 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1080 transitions. Word has length 366 [2022-01-31 20:04:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:02,236 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1080 transitions. [2022-01-31 20:04:02,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.9917355371900825) internal successors, (362), 120 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1080 transitions. [2022-01-31 20:04:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 20:04:02,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:02,238 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:02,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 20:04:02,238 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1338610510, now seen corresponding path program 117 times [2022-01-31 20:04:02,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:02,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833912933] [2022-01-31 20:04:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:02,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:02,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:04:02,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:02,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:06,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:06,736 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 20:04:06,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833912933] [2022-01-31 20:04:06,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [833912933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:06,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:06,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 20:04:06,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033136558] [2022-01-31 20:04:06,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:06,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 20:04:06,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 20:04:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:04:06,740 INFO L87 Difference]: Start difference. First operand 961 states and 1080 transitions. Second operand has 122 states, 122 states have (on average 2.9918032786885247) internal successors, (365), 121 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:10,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:10,886 INFO L93 Difference]: Finished difference Result 1572 states and 1813 transitions. [2022-01-31 20:04:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 20:04:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.9918032786885247) internal successors, (365), 121 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-01-31 20:04:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:10,888 INFO L225 Difference]: With dead ends: 1572 [2022-01-31 20:04:10,888 INFO L226 Difference]: Without dead ends: 973 [2022-01-31 20:04:10,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7384, Invalid=7622, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:04:10,890 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1832 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1951 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:10,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1951 Valid, 276 Invalid, 2651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:04:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-01-31 20:04:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 969. [2022-01-31 20:04:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 845 states have (on average 1.0035502958579883) internal successors, (848), 845 states have internal predecessors, (848), 121 states have call successors, (121), 3 states have call predecessors, (121), 2 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2022-01-31 20:04:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1089 transitions. [2022-01-31 20:04:11,603 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1089 transitions. Word has length 369 [2022-01-31 20:04:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:11,604 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1089 transitions. [2022-01-31 20:04:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.9918032786885247) internal successors, (365), 121 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1089 transitions. [2022-01-31 20:04:11,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-01-31 20:04:11,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:11,605 INFO L514 BasicCegarLoop]: trace histogram [120, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:11,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 20:04:11,605 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1645990915, now seen corresponding path program 118 times [2022-01-31 20:04:11,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:11,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217951667] [2022-01-31 20:04:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:11,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:11,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:04:11,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:11,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:16,130 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:16,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217951667] [2022-01-31 20:04:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217951667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:16,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:16,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 20:04:16,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156617280] [2022-01-31 20:04:16,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:16,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 20:04:16,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 20:04:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:04:16,134 INFO L87 Difference]: Start difference. First operand 969 states and 1089 transitions. Second operand has 123 states, 123 states have (on average 2.991869918699187) internal successors, (368), 122 states have internal predecessors, (368), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:20,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:20,236 INFO L93 Difference]: Finished difference Result 1585 states and 1828 transitions. [2022-01-31 20:04:20,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 20:04:20,236 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.991869918699187) internal successors, (368), 122 states have internal predecessors, (368), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 372 [2022-01-31 20:04:20,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:20,238 INFO L225 Difference]: With dead ends: 1585 [2022-01-31 20:04:20,238 INFO L226 Difference]: Without dead ends: 981 [2022-01-31 20:04:20,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7506, Invalid=7746, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:04:20,239 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 1809 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 1131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1131 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1929 Valid, 283 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1131 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:04:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-31 20:04:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 977. [2022-01-31 20:04:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 852 states have (on average 1.0035211267605635) internal successors, (855), 852 states have internal predecessors, (855), 122 states have call successors, (122), 3 states have call predecessors, (122), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 20:04:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1098 transitions. [2022-01-31 20:04:20,984 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1098 transitions. Word has length 372 [2022-01-31 20:04:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:20,985 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1098 transitions. [2022-01-31 20:04:20,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.991869918699187) internal successors, (368), 122 states have internal predecessors, (368), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1098 transitions. [2022-01-31 20:04:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 20:04:20,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:20,986 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:20,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 20:04:20,986 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1945361198, now seen corresponding path program 119 times [2022-01-31 20:04:20,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:20,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651133396] [2022-01-31 20:04:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:20,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:20,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:04:20,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:20,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:25,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:25,605 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:25,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651133396] [2022-01-31 20:04:25,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [651133396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:25,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:25,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 20:04:25,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763791283] [2022-01-31 20:04:25,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:25,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 20:04:25,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:25,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 20:04:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:04:25,609 INFO L87 Difference]: Start difference. First operand 977 states and 1098 transitions. Second operand has 124 states, 124 states have (on average 2.9919354838709675) internal successors, (371), 123 states have internal predecessors, (371), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:29,782 INFO L93 Difference]: Finished difference Result 1598 states and 1843 transitions. [2022-01-31 20:04:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 20:04:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.9919354838709675) internal successors, (371), 123 states have internal predecessors, (371), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 20:04:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:29,784 INFO L225 Difference]: With dead ends: 1598 [2022-01-31 20:04:29,784 INFO L226 Difference]: Without dead ends: 989 [2022-01-31 20:04:29,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7629, Invalid=7871, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:04:29,786 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 1534 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:29,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 305 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [947 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-31 20:04:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 985. [2022-01-31 20:04:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 859 states have (on average 1.0034924330616997) internal successors, (862), 859 states have internal predecessors, (862), 123 states have call successors, (123), 3 states have call predecessors, (123), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-31 20:04:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1107 transitions. [2022-01-31 20:04:30,538 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1107 transitions. Word has length 375 [2022-01-31 20:04:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1107 transitions. [2022-01-31 20:04:30,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.9919354838709675) internal successors, (371), 123 states have internal predecessors, (371), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1107 transitions. [2022-01-31 20:04:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-31 20:04:30,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:30,539 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:30,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 20:04:30,540 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash -161611741, now seen corresponding path program 120 times [2022-01-31 20:04:30,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:30,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592245252] [2022-01-31 20:04:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:30,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:30,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:04:30,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:30,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:35,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:35,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592245252] [2022-01-31 20:04:35,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592245252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:35,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:35,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 20:04:35,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089315464] [2022-01-31 20:04:35,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:35,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 20:04:35,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:35,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 20:04:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:04:35,226 INFO L87 Difference]: Start difference. First operand 985 states and 1107 transitions. Second operand has 125 states, 125 states have (on average 2.992) internal successors, (374), 124 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:39,784 INFO L93 Difference]: Finished difference Result 1611 states and 1858 transitions. [2022-01-31 20:04:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 20:04:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.992) internal successors, (374), 124 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 378 [2022-01-31 20:04:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:39,786 INFO L225 Difference]: With dead ends: 1611 [2022-01-31 20:04:39,786 INFO L226 Difference]: Without dead ends: 997 [2022-01-31 20:04:39,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7753, Invalid=7997, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:04:39,788 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 1646 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:39,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1768 Valid, 292 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-01-31 20:04:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 993. [2022-01-31 20:04:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 866 states have (on average 1.0034642032332564) internal successors, (869), 866 states have internal predecessors, (869), 124 states have call successors, (124), 3 states have call predecessors, (124), 2 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 20:04:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1116 transitions. [2022-01-31 20:04:40,557 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1116 transitions. Word has length 378 [2022-01-31 20:04:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:40,558 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1116 transitions. [2022-01-31 20:04:40,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.992) internal successors, (374), 124 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1116 transitions. [2022-01-31 20:04:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 20:04:40,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:40,559 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:40,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 20:04:40,559 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1954593550, now seen corresponding path program 121 times [2022-01-31 20:04:40,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:40,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742044303] [2022-01-31 20:04:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:40,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:40,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:04:40,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:40,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:45,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:45,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:45,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742044303] [2022-01-31 20:04:45,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [742044303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:45,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:45,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 20:04:45,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691346415] [2022-01-31 20:04:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:45,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 20:04:45,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:45,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 20:04:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:04:45,323 INFO L87 Difference]: Start difference. First operand 993 states and 1116 transitions. Second operand has 126 states, 126 states have (on average 2.992063492063492) internal successors, (377), 125 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:50,049 INFO L93 Difference]: Finished difference Result 1624 states and 1873 transitions. [2022-01-31 20:04:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 20:04:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.992063492063492) internal successors, (377), 125 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 381 [2022-01-31 20:04:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:50,051 INFO L225 Difference]: With dead ends: 1624 [2022-01-31 20:04:50,051 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 20:04:50,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7878, Invalid=8124, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:04:50,053 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 1434 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:50,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 314 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:04:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 20:04:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1001. [2022-01-31 20:04:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 873 states have (on average 1.0034364261168385) internal successors, (876), 873 states have internal predecessors, (876), 125 states have call successors, (125), 3 states have call predecessors, (125), 2 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2022-01-31 20:04:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1125 transitions. [2022-01-31 20:04:50,839 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1125 transitions. Word has length 381 [2022-01-31 20:04:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:50,839 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1125 transitions. [2022-01-31 20:04:50,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.992063492063492) internal successors, (377), 125 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1125 transitions. [2022-01-31 20:04:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-01-31 20:04:50,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:50,840 INFO L514 BasicCegarLoop]: trace histogram [124, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:50,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 20:04:50,840 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1479747, now seen corresponding path program 122 times [2022-01-31 20:04:50,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:50,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306900155] [2022-01-31 20:04:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:50,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:50,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:04:50,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:50,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:55,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:55,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:55,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306900155] [2022-01-31 20:04:55,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306900155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:55,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:55,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 20:04:55,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827942885] [2022-01-31 20:04:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:55,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 20:04:55,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 20:04:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:04:55,678 INFO L87 Difference]: Start difference. First operand 1001 states and 1125 transitions. Second operand has 127 states, 127 states have (on average 2.9921259842519685) internal successors, (380), 126 states have internal predecessors, (380), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:00,377 INFO L93 Difference]: Finished difference Result 1637 states and 1888 transitions. [2022-01-31 20:05:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 20:05:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.9921259842519685) internal successors, (380), 126 states have internal predecessors, (380), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 384 [2022-01-31 20:05:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:00,379 INFO L225 Difference]: With dead ends: 1637 [2022-01-31 20:05:00,379 INFO L226 Difference]: Without dead ends: 1013 [2022-01-31 20:05:00,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8004, Invalid=8252, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:05:00,381 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1759 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:00,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1883 Valid, 291 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:05:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-31 20:05:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1009. [2022-01-31 20:05:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 880 states have (on average 1.003409090909091) internal successors, (883), 880 states have internal predecessors, (883), 126 states have call successors, (126), 3 states have call predecessors, (126), 2 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-01-31 20:05:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1134 transitions. [2022-01-31 20:05:01,192 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1134 transitions. Word has length 384 [2022-01-31 20:05:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:01,193 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1134 transitions. [2022-01-31 20:05:01,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.9921259842519685) internal successors, (380), 126 states have internal predecessors, (380), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1134 transitions. [2022-01-31 20:05:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 20:05:01,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:01,194 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:01,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 20:05:01,194 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1289866514, now seen corresponding path program 123 times [2022-01-31 20:05:01,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:01,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57840065] [2022-01-31 20:05:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:01,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:01,196 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:01,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:06,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:06,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:06,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57840065] [2022-01-31 20:05:06,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [57840065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:06,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:06,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 20:05:06,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117363618] [2022-01-31 20:05:06,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:06,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 20:05:06,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 20:05:06,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:05:06,125 INFO L87 Difference]: Start difference. First operand 1009 states and 1134 transitions. Second operand has 128 states, 128 states have (on average 2.9921875) internal successors, (383), 127 states have internal predecessors, (383), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:10,762 INFO L93 Difference]: Finished difference Result 1650 states and 1903 transitions. [2022-01-31 20:05:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 20:05:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.9921875) internal successors, (383), 127 states have internal predecessors, (383), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 20:05:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:10,764 INFO L225 Difference]: With dead ends: 1650 [2022-01-31 20:05:10,764 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 20:05:10,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8131, Invalid=8381, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:05:10,766 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1463 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:10,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 293 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:05:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 20:05:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 1017. [2022-01-31 20:05:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 887 states have (on average 1.003382187147689) internal successors, (890), 887 states have internal predecessors, (890), 127 states have call successors, (127), 3 states have call predecessors, (127), 2 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2022-01-31 20:05:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1143 transitions. [2022-01-31 20:05:11,589 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1143 transitions. Word has length 387 [2022-01-31 20:05:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:11,590 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1143 transitions. [2022-01-31 20:05:11,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.9921875) internal successors, (383), 127 states have internal predecessors, (383), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1143 transitions. [2022-01-31 20:05:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 20:05:11,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:11,591 INFO L514 BasicCegarLoop]: trace histogram [126, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:11,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 20:05:11,592 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1764257693, now seen corresponding path program 124 times [2022-01-31 20:05:11,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739859618] [2022-01-31 20:05:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:11,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:11,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:11,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:11,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:16,561 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:16,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739859618] [2022-01-31 20:05:16,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [739859618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:16,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:16,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 20:05:16,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094087409] [2022-01-31 20:05:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:16,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 20:05:16,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:16,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 20:05:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:05:16,566 INFO L87 Difference]: Start difference. First operand 1017 states and 1143 transitions. Second operand has 129 states, 129 states have (on average 2.992248062015504) internal successors, (386), 128 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:21,202 INFO L93 Difference]: Finished difference Result 1663 states and 1918 transitions. [2022-01-31 20:05:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 20:05:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.992248062015504) internal successors, (386), 128 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 20:05:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:21,205 INFO L225 Difference]: With dead ends: 1663 [2022-01-31 20:05:21,205 INFO L226 Difference]: Without dead ends: 1029 [2022-01-31 20:05:21,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 20:05:21,207 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 1500 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 922 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:21,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1626 Valid, 295 Invalid, 2459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [922 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:05:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-31 20:05:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 1025. [2022-01-31 20:05:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 894 states have (on average 1.0033557046979866) internal successors, (897), 894 states have internal predecessors, (897), 128 states have call successors, (128), 3 states have call predecessors, (128), 2 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-01-31 20:05:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1152 transitions. [2022-01-31 20:05:22,057 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1152 transitions. Word has length 390 [2022-01-31 20:05:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:22,057 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1152 transitions. [2022-01-31 20:05:22,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.992248062015504) internal successors, (386), 128 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1152 transitions. [2022-01-31 20:05:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-01-31 20:05:22,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:22,059 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:22,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 20:05:22,059 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 385499854, now seen corresponding path program 125 times [2022-01-31 20:05:22,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:22,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648818675] [2022-01-31 20:05:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:22,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:22,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:22,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:22,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:27,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:27,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648818675] [2022-01-31 20:05:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [648818675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:27,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:27,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 20:05:27,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335581900] [2022-01-31 20:05:27,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:27,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 20:05:27,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 20:05:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 20:05:27,164 INFO L87 Difference]: Start difference. First operand 1025 states and 1152 transitions. Second operand has 130 states, 130 states have (on average 2.9923076923076923) internal successors, (389), 129 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:32,129 INFO L93 Difference]: Finished difference Result 1676 states and 1933 transitions. [2022-01-31 20:05:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 20:05:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.9923076923076923) internal successors, (389), 129 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 393 [2022-01-31 20:05:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:32,132 INFO L225 Difference]: With dead ends: 1676 [2022-01-31 20:05:32,132 INFO L226 Difference]: Without dead ends: 1037 [2022-01-31 20:05:32,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8388, Invalid=8642, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:05:32,134 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 1780 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 317 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:05:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-31 20:05:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1033. [2022-01-31 20:05:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 901 states have (on average 1.0033296337402886) internal successors, (904), 901 states have internal predecessors, (904), 129 states have call successors, (129), 3 states have call predecessors, (129), 2 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2022-01-31 20:05:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1161 transitions. [2022-01-31 20:05:33,002 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1161 transitions. Word has length 393 [2022-01-31 20:05:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:33,002 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1161 transitions. [2022-01-31 20:05:33,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.9923076923076923) internal successors, (389), 129 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1161 transitions. [2022-01-31 20:05:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-31 20:05:33,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:33,004 INFO L514 BasicCegarLoop]: trace histogram [128, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:33,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 20:05:33,004 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1555231875, now seen corresponding path program 126 times [2022-01-31 20:05:33,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:33,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573513737] [2022-01-31 20:05:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:33,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:33,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:33,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:33,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:38,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:38,197 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:38,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573513737] [2022-01-31 20:05:38,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [573513737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:38,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:38,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 20:05:38,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863032588] [2022-01-31 20:05:38,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:38,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 20:05:38,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 20:05:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:05:38,202 INFO L87 Difference]: Start difference. First operand 1033 states and 1161 transitions. Second operand has 131 states, 131 states have (on average 2.9923664122137406) internal successors, (392), 130 states have internal predecessors, (392), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:43,265 INFO L93 Difference]: Finished difference Result 1689 states and 1948 transitions. [2022-01-31 20:05:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 20:05:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.9923664122137406) internal successors, (392), 130 states have internal predecessors, (392), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 396 [2022-01-31 20:05:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:43,267 INFO L225 Difference]: With dead ends: 1689 [2022-01-31 20:05:43,267 INFO L226 Difference]: Without dead ends: 1045 [2022-01-31 20:05:43,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8518, Invalid=8774, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 20:05:43,269 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 2009 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:43,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2137 Valid, 309 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1262 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:05:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-01-31 20:05:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1041. [2022-01-31 20:05:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 908 states have (on average 1.0033039647577093) internal successors, (911), 908 states have internal predecessors, (911), 130 states have call successors, (130), 3 states have call predecessors, (130), 2 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-01-31 20:05:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1170 transitions. [2022-01-31 20:05:44,152 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1170 transitions. Word has length 396 [2022-01-31 20:05:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:44,152 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1170 transitions. [2022-01-31 20:05:44,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.9923664122137406) internal successors, (392), 130 states have internal predecessors, (392), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1170 transitions. [2022-01-31 20:05:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 20:05:44,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:44,153 INFO L514 BasicCegarLoop]: trace histogram [129, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:44,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 20:05:44,153 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash -322770258, now seen corresponding path program 127 times [2022-01-31 20:05:44,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:44,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110330152] [2022-01-31 20:05:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:44,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:44,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:44,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:44,164 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:49,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110330152] [2022-01-31 20:05:49,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110330152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:49,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:49,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 20:05:49,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624946719] [2022-01-31 20:05:49,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:49,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 20:05:49,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 20:05:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 20:05:49,352 INFO L87 Difference]: Start difference. First operand 1041 states and 1170 transitions. Second operand has 132 states, 132 states have (on average 2.992424242424242) internal successors, (395), 131 states have internal predecessors, (395), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:55,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:55,251 INFO L93 Difference]: Finished difference Result 1702 states and 1963 transitions. [2022-01-31 20:05:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 20:05:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.992424242424242) internal successors, (395), 131 states have internal predecessors, (395), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 20:05:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:55,253 INFO L225 Difference]: With dead ends: 1702 [2022-01-31 20:05:55,253 INFO L226 Difference]: Without dead ends: 1053 [2022-01-31 20:05:55,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8649, Invalid=8907, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:05:55,255 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 1758 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:55,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 306 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:05:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-31 20:05:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1049. [2022-01-31 20:05:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 915 states have (on average 1.0032786885245901) internal successors, (918), 915 states have internal predecessors, (918), 131 states have call successors, (131), 3 states have call predecessors, (131), 2 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2022-01-31 20:05:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1179 transitions. [2022-01-31 20:05:56,157 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1179 transitions. Word has length 399 [2022-01-31 20:05:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1179 transitions. [2022-01-31 20:05:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.992424242424242) internal successors, (395), 131 states have internal predecessors, (395), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1179 transitions. [2022-01-31 20:05:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-01-31 20:05:56,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:56,159 INFO L514 BasicCegarLoop]: trace histogram [130, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:56,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 20:05:56,159 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:56,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1640316765, now seen corresponding path program 128 times [2022-01-31 20:05:56,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:56,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038188850] [2022-01-31 20:05:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:56,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:56,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:05:56,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:56,168 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:01,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:01,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:01,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038188850] [2022-01-31 20:06:01,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038188850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:01,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:01,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 20:06:01,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750852973] [2022-01-31 20:06:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:01,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 20:06:01,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 20:06:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:06:01,488 INFO L87 Difference]: Start difference. First operand 1049 states and 1179 transitions. Second operand has 133 states, 133 states have (on average 2.992481203007519) internal successors, (398), 132 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:07,620 INFO L93 Difference]: Finished difference Result 1715 states and 1978 transitions. [2022-01-31 20:06:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 20:06:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.992481203007519) internal successors, (398), 132 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 402 [2022-01-31 20:06:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:07,623 INFO L225 Difference]: With dead ends: 1715 [2022-01-31 20:06:07,623 INFO L226 Difference]: Without dead ends: 1061 [2022-01-31 20:06:07,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8781, Invalid=9041, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:06:07,626 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1504 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:07,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 Valid, 318 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:06:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-01-31 20:06:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1057. [2022-01-31 20:06:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 922 states have (on average 1.0032537960954446) internal successors, (925), 922 states have internal predecessors, (925), 132 states have call successors, (132), 3 states have call predecessors, (132), 2 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-01-31 20:06:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1188 transitions. [2022-01-31 20:06:08,579 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1188 transitions. Word has length 402 [2022-01-31 20:06:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:08,580 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1188 transitions. [2022-01-31 20:06:08,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.992481203007519) internal successors, (398), 132 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1188 transitions. [2022-01-31 20:06:08,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-31 20:06:08,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:08,581 INFO L514 BasicCegarLoop]: trace histogram [131, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:08,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 20:06:08,581 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash -962188658, now seen corresponding path program 129 times [2022-01-31 20:06:08,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573854382] [2022-01-31 20:06:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:08,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:08,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:08,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:08,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:13,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:13,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:13,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573854382] [2022-01-31 20:06:13,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [573854382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:13,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:13,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 20:06:13,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103893402] [2022-01-31 20:06:13,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:13,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 20:06:13,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 20:06:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:06:13,990 INFO L87 Difference]: Start difference. First operand 1057 states and 1188 transitions. Second operand has 134 states, 134 states have (on average 2.9925373134328357) internal successors, (401), 133 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:20,469 INFO L93 Difference]: Finished difference Result 1728 states and 1993 transitions. [2022-01-31 20:06:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 20:06:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.9925373134328357) internal successors, (401), 133 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-01-31 20:06:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:20,471 INFO L225 Difference]: With dead ends: 1728 [2022-01-31 20:06:20,471 INFO L226 Difference]: Without dead ends: 1069 [2022-01-31 20:06:20,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8914, Invalid=9176, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:06:20,473 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 1817 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:20,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 315 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:06:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-31 20:06:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1065. [2022-01-31 20:06:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 929 states have (on average 1.0032292787944026) internal successors, (932), 929 states have internal predecessors, (932), 133 states have call successors, (133), 3 states have call predecessors, (133), 2 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:06:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1197 transitions. [2022-01-31 20:06:21,418 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1197 transitions. Word has length 405 [2022-01-31 20:06:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:21,418 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1197 transitions. [2022-01-31 20:06:21,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.9925373134328357) internal successors, (401), 133 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1197 transitions. [2022-01-31 20:06:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-01-31 20:06:21,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:21,419 INFO L514 BasicCegarLoop]: trace histogram [132, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:21,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 20:06:21,419 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:21,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1921053891, now seen corresponding path program 130 times [2022-01-31 20:06:21,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:21,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220444444] [2022-01-31 20:06:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:21,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:21,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:21,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:21,429 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:26,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:26,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:26,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220444444] [2022-01-31 20:06:26,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [220444444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:26,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:26,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 20:06:26,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801221688] [2022-01-31 20:06:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:26,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 20:06:26,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 20:06:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:06:26,932 INFO L87 Difference]: Start difference. First operand 1065 states and 1197 transitions. Second operand has 135 states, 135 states have (on average 2.9925925925925925) internal successors, (404), 134 states have internal predecessors, (404), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:32,779 INFO L93 Difference]: Finished difference Result 1741 states and 2008 transitions. [2022-01-31 20:06:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 20:06:32,779 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.9925925925925925) internal successors, (404), 134 states have internal predecessors, (404), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 408 [2022-01-31 20:06:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:32,781 INFO L225 Difference]: With dead ends: 1741 [2022-01-31 20:06:32,782 INFO L226 Difference]: Without dead ends: 1077 [2022-01-31 20:06:32,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9048, Invalid=9312, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 20:06:32,783 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 1689 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1821 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:32,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1821 Valid, 312 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:06:32,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-31 20:06:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1073. [2022-01-31 20:06:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 936 states have (on average 1.0032051282051282) internal successors, (939), 936 states have internal predecessors, (939), 134 states have call successors, (134), 3 states have call predecessors, (134), 2 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 20:06:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1206 transitions. [2022-01-31 20:06:33,755 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1206 transitions. Word has length 408 [2022-01-31 20:06:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:33,756 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1206 transitions. [2022-01-31 20:06:33,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.9925925925925925) internal successors, (404), 134 states have internal predecessors, (404), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1206 transitions. [2022-01-31 20:06:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 20:06:33,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:33,757 INFO L514 BasicCegarLoop]: trace histogram [133, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:33,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 20:06:33,757 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1548878446, now seen corresponding path program 131 times [2022-01-31 20:06:33,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:33,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208379941] [2022-01-31 20:06:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:33,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:33,759 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:33,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:33,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:39,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208379941] [2022-01-31 20:06:39,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [208379941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:39,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:39,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 20:06:39,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113303866] [2022-01-31 20:06:39,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:39,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 20:06:39,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 20:06:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 20:06:39,372 INFO L87 Difference]: Start difference. First operand 1073 states and 1206 transitions. Second operand has 136 states, 136 states have (on average 2.9926470588235294) internal successors, (407), 135 states have internal predecessors, (407), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:44,902 INFO L93 Difference]: Finished difference Result 1754 states and 2023 transitions. [2022-01-31 20:06:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 20:06:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.9926470588235294) internal successors, (407), 135 states have internal predecessors, (407), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 20:06:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:44,905 INFO L225 Difference]: With dead ends: 1754 [2022-01-31 20:06:44,905 INFO L226 Difference]: Without dead ends: 1085 [2022-01-31 20:06:44,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9183, Invalid=9449, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:06:44,906 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1942 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 1212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1212 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:44,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 304 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1212 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:06:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-31 20:06:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1081. [2022-01-31 20:06:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 943 states have (on average 1.0031813361611877) internal successors, (946), 943 states have internal predecessors, (946), 135 states have call successors, (135), 3 states have call predecessors, (135), 2 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-01-31 20:06:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1215 transitions. [2022-01-31 20:06:45,894 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1215 transitions. Word has length 411 [2022-01-31 20:06:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:45,894 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1215 transitions. [2022-01-31 20:06:45,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.9926470588235294) internal successors, (407), 135 states have internal predecessors, (407), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1215 transitions. [2022-01-31 20:06:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-31 20:06:45,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:45,895 INFO L514 BasicCegarLoop]: trace histogram [134, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:45,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 20:06:45,895 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -619212573, now seen corresponding path program 132 times [2022-01-31 20:06:45,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078861167] [2022-01-31 20:06:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:45,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:45,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:45,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:45,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:51,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:51,524 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078861167] [2022-01-31 20:06:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078861167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:51,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:51,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 20:06:51,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069781175] [2022-01-31 20:06:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 20:06:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 20:06:51,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:06:51,529 INFO L87 Difference]: Start difference. First operand 1081 states and 1215 transitions. Second operand has 137 states, 137 states have (on average 2.9927007299270074) internal successors, (410), 136 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:57,705 INFO L93 Difference]: Finished difference Result 1767 states and 2038 transitions. [2022-01-31 20:06:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 20:06:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.9927007299270074) internal successors, (410), 136 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 414 [2022-01-31 20:06:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:57,707 INFO L225 Difference]: With dead ends: 1767 [2022-01-31 20:06:57,707 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 20:06:57,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9319, Invalid=9587, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 20:06:57,709 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1853 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1987 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:57,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1987 Valid, 306 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:06:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 20:06:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1089. [2022-01-31 20:06:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 950 states have (on average 1.003157894736842) internal successors, (953), 950 states have internal predecessors, (953), 136 states have call successors, (136), 3 states have call predecessors, (136), 2 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2022-01-31 20:06:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1224 transitions. [2022-01-31 20:06:58,746 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1224 transitions. Word has length 414 [2022-01-31 20:06:58,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:58,747 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1224 transitions. [2022-01-31 20:06:58,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.9927007299270074) internal successors, (410), 136 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1224 transitions. [2022-01-31 20:06:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-01-31 20:06:58,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:58,748 INFO L514 BasicCegarLoop]: trace histogram [135, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:58,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 20:06:58,748 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1794404942, now seen corresponding path program 133 times [2022-01-31 20:06:58,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145683397] [2022-01-31 20:06:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:58,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:58,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:06:58,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:58,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:04,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:04,458 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145683397] [2022-01-31 20:07:04,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145683397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:04,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:04,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 20:07:04,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273020170] [2022-01-31 20:07:04,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:04,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 20:07:04,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 20:07:04,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 20:07:04,462 INFO L87 Difference]: Start difference. First operand 1089 states and 1224 transitions. Second operand has 138 states, 138 states have (on average 2.9927536231884058) internal successors, (413), 137 states have internal predecessors, (413), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:11,179 INFO L93 Difference]: Finished difference Result 1780 states and 2053 transitions. [2022-01-31 20:07:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 20:07:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.9927536231884058) internal successors, (413), 137 states have internal predecessors, (413), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 417 [2022-01-31 20:07:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:11,181 INFO L225 Difference]: With dead ends: 1780 [2022-01-31 20:07:11,181 INFO L226 Difference]: Without dead ends: 1101 [2022-01-31 20:07:11,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9456, Invalid=9726, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:07:11,183 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1704 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:11,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1839 Valid, 328 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:07:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-01-31 20:07:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1097. [2022-01-31 20:07:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 957 states have (on average 1.0031347962382444) internal successors, (960), 957 states have internal predecessors, (960), 137 states have call successors, (137), 3 states have call predecessors, (137), 2 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2022-01-31 20:07:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1233 transitions. [2022-01-31 20:07:12,203 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1233 transitions. Word has length 417 [2022-01-31 20:07:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:12,203 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1233 transitions. [2022-01-31 20:07:12,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.9927536231884058) internal successors, (413), 137 states have internal predecessors, (413), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:12,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1233 transitions. [2022-01-31 20:07:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-01-31 20:07:12,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:12,205 INFO L514 BasicCegarLoop]: trace histogram [136, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:12,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 20:07:12,205 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -468675325, now seen corresponding path program 134 times [2022-01-31 20:07:12,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143728385] [2022-01-31 20:07:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:12,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:12,207 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:07:12,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:12,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:18,020 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143728385] [2022-01-31 20:07:18,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [143728385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:18,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:18,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 20:07:18,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657060860] [2022-01-31 20:07:18,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:18,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 20:07:18,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 20:07:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:07:18,025 INFO L87 Difference]: Start difference. First operand 1097 states and 1233 transitions. Second operand has 139 states, 139 states have (on average 2.9928057553956835) internal successors, (416), 138 states have internal predecessors, (416), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:24,294 INFO L93 Difference]: Finished difference Result 1793 states and 2068 transitions. [2022-01-31 20:07:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 20:07:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.9928057553956835) internal successors, (416), 138 states have internal predecessors, (416), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 420 [2022-01-31 20:07:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:24,296 INFO L225 Difference]: With dead ends: 1793 [2022-01-31 20:07:24,296 INFO L226 Difference]: Without dead ends: 1109 [2022-01-31 20:07:24,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9594, Invalid=9866, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:07:24,298 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 2035 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 1270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2171 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1270 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:24,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2171 Valid, 315 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1270 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:07:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-01-31 20:07:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1105. [2022-01-31 20:07:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 964 states have (on average 1.0031120331950207) internal successors, (967), 964 states have internal predecessors, (967), 138 states have call successors, (138), 3 states have call predecessors, (138), 2 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-01-31 20:07:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1242 transitions. [2022-01-31 20:07:25,340 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1242 transitions. Word has length 420 [2022-01-31 20:07:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:25,341 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1242 transitions. [2022-01-31 20:07:25,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.9928057553956835) internal successors, (416), 138 states have internal predecessors, (416), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1242 transitions. [2022-01-31 20:07:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 20:07:25,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:25,343 INFO L514 BasicCegarLoop]: trace histogram [137, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:25,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 20:07:25,343 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:25,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1791264210, now seen corresponding path program 135 times [2022-01-31 20:07:25,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205664009] [2022-01-31 20:07:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:25,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:25,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:07:25,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:25,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:31,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:31,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205664009] [2022-01-31 20:07:31,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205664009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:31,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:31,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 20:07:31,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305740285] [2022-01-31 20:07:31,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 20:07:31,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 20:07:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:07:31,251 INFO L87 Difference]: Start difference. First operand 1105 states and 1242 transitions. Second operand has 140 states, 140 states have (on average 2.992857142857143) internal successors, (419), 139 states have internal predecessors, (419), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:37,912 INFO L93 Difference]: Finished difference Result 1806 states and 2083 transitions. [2022-01-31 20:07:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 20:07:37,912 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.992857142857143) internal successors, (419), 139 states have internal predecessors, (419), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 423 [2022-01-31 20:07:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:37,914 INFO L225 Difference]: With dead ends: 1806 [2022-01-31 20:07:37,914 INFO L226 Difference]: Without dead ends: 1117 [2022-01-31 20:07:37,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9733, Invalid=10007, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:07:37,917 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1466 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:37,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 347 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:07:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-31 20:07:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1113. [2022-01-31 20:07:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 971 states have (on average 1.0030895983522141) internal successors, (974), 971 states have internal predecessors, (974), 139 states have call successors, (139), 3 states have call predecessors, (139), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-01-31 20:07:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1251 transitions. [2022-01-31 20:07:39,016 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1251 transitions. Word has length 423 [2022-01-31 20:07:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:39,016 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1251 transitions. [2022-01-31 20:07:39,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.992857142857143) internal successors, (419), 139 states have internal predecessors, (419), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1251 transitions. [2022-01-31 20:07:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-31 20:07:39,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:39,017 INFO L514 BasicCegarLoop]: trace histogram [138, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:39,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 20:07:39,018 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1006763741, now seen corresponding path program 136 times [2022-01-31 20:07:39,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465345708] [2022-01-31 20:07:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:39,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:39,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:07:39,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:39,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:44,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:44,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465345708] [2022-01-31 20:07:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465345708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:44,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:44,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 20:07:44,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605537072] [2022-01-31 20:07:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:44,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 20:07:44,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 20:07:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:07:44,946 INFO L87 Difference]: Start difference. First operand 1113 states and 1251 transitions. Second operand has 141 states, 141 states have (on average 2.99290780141844) internal successors, (422), 140 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:52,011 INFO L93 Difference]: Finished difference Result 1819 states and 2098 transitions. [2022-01-31 20:07:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 20:07:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.99290780141844) internal successors, (422), 140 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 426 [2022-01-31 20:07:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:52,014 INFO L225 Difference]: With dead ends: 1819 [2022-01-31 20:07:52,014 INFO L226 Difference]: Without dead ends: 1125 [2022-01-31 20:07:52,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9873, Invalid=10149, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 20:07:52,016 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 1884 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 1169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1169 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:52,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2022 Valid, 339 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1169 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:07:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-01-31 20:07:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1121. [2022-01-31 20:07:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 978 states have (on average 1.0030674846625767) internal successors, (981), 978 states have internal predecessors, (981), 140 states have call successors, (140), 3 states have call predecessors, (140), 2 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-01-31 20:07:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1260 transitions. [2022-01-31 20:07:53,104 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1260 transitions. Word has length 426 [2022-01-31 20:07:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:53,104 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1260 transitions. [2022-01-31 20:07:53,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.99290780141844) internal successors, (422), 140 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1260 transitions. [2022-01-31 20:07:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-01-31 20:07:53,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:53,106 INFO L514 BasicCegarLoop]: trace histogram [139, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:53,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 20:07:53,106 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1129650702, now seen corresponding path program 137 times [2022-01-31 20:07:53,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845078251] [2022-01-31 20:07:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:53,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:53,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:07:53,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:53,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:59,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:59,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845078251] [2022-01-31 20:07:59,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845078251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:59,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:59,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 20:07:59,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566750881] [2022-01-31 20:07:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:59,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 20:07:59,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 20:07:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 20:07:59,105 INFO L87 Difference]: Start difference. First operand 1121 states and 1260 transitions. Second operand has 142 states, 142 states have (on average 2.992957746478873) internal successors, (425), 141 states have internal predecessors, (425), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:05,763 INFO L93 Difference]: Finished difference Result 1832 states and 2113 transitions. [2022-01-31 20:08:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 20:08:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.992957746478873) internal successors, (425), 141 states have internal predecessors, (425), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 429 [2022-01-31 20:08:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:05,766 INFO L225 Difference]: With dead ends: 1832 [2022-01-31 20:08:05,766 INFO L226 Difference]: Without dead ends: 1133 [2022-01-31 20:08:05,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=10014, Invalid=10292, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:08:05,768 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1936 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2075 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:05,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2075 Valid, 316 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:08:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-31 20:08:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1129. [2022-01-31 20:08:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 985 states have (on average 1.0030456852791878) internal successors, (988), 985 states have internal predecessors, (988), 141 states have call successors, (141), 3 states have call predecessors, (141), 2 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2022-01-31 20:08:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1269 transitions. [2022-01-31 20:08:06,884 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1269 transitions. Word has length 429 [2022-01-31 20:08:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:06,884 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1269 transitions. [2022-01-31 20:08:06,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.992957746478873) internal successors, (425), 141 states have internal predecessors, (425), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1269 transitions. [2022-01-31 20:08:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-01-31 20:08:06,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:06,885 INFO L514 BasicCegarLoop]: trace histogram [140, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:06,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 20:08:06,885 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:06,886 INFO L85 PathProgramCache]: Analyzing trace with hash -68037309, now seen corresponding path program 138 times [2022-01-31 20:08:06,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:06,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860341844] [2022-01-31 20:08:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:06,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:06,887 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:08:06,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:06,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:13,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:13,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:13,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860341844] [2022-01-31 20:08:13,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860341844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:13,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:13,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 20:08:13,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127549850] [2022-01-31 20:08:13,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:13,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 20:08:13,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 20:08:13,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:08:13,042 INFO L87 Difference]: Start difference. First operand 1129 states and 1269 transitions. Second operand has 143 states, 143 states have (on average 2.993006993006993) internal successors, (428), 142 states have internal predecessors, (428), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:20,668 INFO L93 Difference]: Finished difference Result 1845 states and 2128 transitions. [2022-01-31 20:08:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 20:08:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.993006993006993) internal successors, (428), 142 states have internal predecessors, (428), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 432 [2022-01-31 20:08:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:20,670 INFO L225 Difference]: With dead ends: 1845 [2022-01-31 20:08:20,670 INFO L226 Difference]: Without dead ends: 1141 [2022-01-31 20:08:20,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10156, Invalid=10436, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:08:20,672 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1835 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:20,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 333 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:08:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-31 20:08:21,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1137. [2022-01-31 20:08:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 992 states have (on average 1.003024193548387) internal successors, (995), 992 states have internal predecessors, (995), 142 states have call successors, (142), 3 states have call predecessors, (142), 2 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-01-31 20:08:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1278 transitions. [2022-01-31 20:08:21,841 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1278 transitions. Word has length 432 [2022-01-31 20:08:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:21,842 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1278 transitions. [2022-01-31 20:08:21,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.993006993006993) internal successors, (428), 142 states have internal predecessors, (428), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1278 transitions. [2022-01-31 20:08:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 20:08:21,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:21,844 INFO L514 BasicCegarLoop]: trace histogram [141, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:21,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 20:08:21,844 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2098245138, now seen corresponding path program 139 times [2022-01-31 20:08:21,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:21,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743245875] [2022-01-31 20:08:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:21,846 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:21,846 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:08:21,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:21,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:28,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:28,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743245875] [2022-01-31 20:08:28,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743245875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:28,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:28,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 20:08:28,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686505877] [2022-01-31 20:08:28,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:28,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 20:08:28,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 20:08:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:08:28,047 INFO L87 Difference]: Start difference. First operand 1137 states and 1278 transitions. Second operand has 144 states, 144 states have (on average 2.9930555555555554) internal successors, (431), 143 states have internal predecessors, (431), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:35,163 INFO L93 Difference]: Finished difference Result 1858 states and 2143 transitions. [2022-01-31 20:08:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 20:08:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.9930555555555554) internal successors, (431), 143 states have internal predecessors, (431), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 20:08:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:35,165 INFO L225 Difference]: With dead ends: 1858 [2022-01-31 20:08:35,165 INFO L226 Difference]: Without dead ends: 1149 [2022-01-31 20:08:35,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=10299, Invalid=10581, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:08:35,167 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2517 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 1585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2658 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1585 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:35,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2658 Valid, 330 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1585 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:08:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-31 20:08:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1145. [2022-01-31 20:08:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 999 states have (on average 1.003003003003003) internal successors, (1002), 999 states have internal predecessors, (1002), 143 states have call successors, (143), 3 states have call predecessors, (143), 2 states have return successors, (142), 142 states have call predecessors, (142), 142 states have call successors, (142) [2022-01-31 20:08:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1287 transitions. [2022-01-31 20:08:36,335 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1287 transitions. Word has length 435 [2022-01-31 20:08:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:36,335 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1287 transitions. [2022-01-31 20:08:36,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.9930555555555554) internal successors, (431), 143 states have internal predecessors, (431), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1287 transitions. [2022-01-31 20:08:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 20:08:36,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:36,337 INFO L514 BasicCegarLoop]: trace histogram [142, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:36,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 20:08:36,337 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:36,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2004750691, now seen corresponding path program 140 times [2022-01-31 20:08:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172477700] [2022-01-31 20:08:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:36,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:36,338 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:08:36,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:36,352 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:42,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:42,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172477700] [2022-01-31 20:08:42,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [172477700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:42,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:42,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 20:08:42,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761447600] [2022-01-31 20:08:42,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:42,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 20:08:42,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 20:08:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:08:42,703 INFO L87 Difference]: Start difference. First operand 1145 states and 1287 transitions. Second operand has 145 states, 145 states have (on average 2.9931034482758623) internal successors, (434), 144 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:50,762 INFO L93 Difference]: Finished difference Result 1871 states and 2158 transitions. [2022-01-31 20:08:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 20:08:50,763 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.9931034482758623) internal successors, (434), 144 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 438 [2022-01-31 20:08:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:50,765 INFO L225 Difference]: With dead ends: 1871 [2022-01-31 20:08:50,765 INFO L226 Difference]: Without dead ends: 1157 [2022-01-31 20:08:50,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10443, Invalid=10727, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:08:50,767 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 1624 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:50,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1766 Valid, 337 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:08:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-31 20:08:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1153. [2022-01-31 20:08:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1006 states have (on average 1.002982107355865) internal successors, (1009), 1006 states have internal predecessors, (1009), 144 states have call successors, (144), 3 states have call predecessors, (144), 2 states have return successors, (143), 143 states have call predecessors, (143), 143 states have call successors, (143) [2022-01-31 20:08:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1296 transitions. [2022-01-31 20:08:51,956 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1296 transitions. Word has length 438 [2022-01-31 20:08:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:51,956 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1296 transitions. [2022-01-31 20:08:51,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.9931034482758623) internal successors, (434), 144 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1296 transitions. [2022-01-31 20:08:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-01-31 20:08:51,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:51,957 INFO L514 BasicCegarLoop]: trace histogram [143, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:51,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 20:08:51,957 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:51,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash -415751730, now seen corresponding path program 141 times [2022-01-31 20:08:51,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:51,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401960613] [2022-01-31 20:08:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:51,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:51,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:08:51,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:51,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:58,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:58,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401960613] [2022-01-31 20:08:58,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [401960613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:58,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:58,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 20:08:58,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368514822] [2022-01-31 20:08:58,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:58,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 20:08:58,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 20:08:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:08:58,314 INFO L87 Difference]: Start difference. First operand 1153 states and 1296 transitions. Second operand has 146 states, 146 states have (on average 2.993150684931507) internal successors, (437), 145 states have internal predecessors, (437), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:09:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:09:05,607 INFO L93 Difference]: Finished difference Result 1884 states and 2173 transitions. [2022-01-31 20:09:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 20:09:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.993150684931507) internal successors, (437), 145 states have internal predecessors, (437), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 441 [2022-01-31 20:09:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:09:05,609 INFO L225 Difference]: With dead ends: 1884 [2022-01-31 20:09:05,609 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 20:09:05,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10588, Invalid=10874, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:09:05,612 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 2243 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 1407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2386 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1407 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:09:05,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2386 Valid, 324 Invalid, 3130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1407 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:09:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 20:09:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1161. [2022-01-31 20:09:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1013 states have (on average 1.0029615004935835) internal successors, (1016), 1013 states have internal predecessors, (1016), 145 states have call successors, (145), 3 states have call predecessors, (145), 2 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2022-01-31 20:09:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1305 transitions. [2022-01-31 20:09:06,856 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1305 transitions. Word has length 441 [2022-01-31 20:09:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:09:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1305 transitions. [2022-01-31 20:09:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.993150684931507) internal successors, (437), 145 states have internal predecessors, (437), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:09:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1305 transitions. [2022-01-31 20:09:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-01-31 20:09:06,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:09:06,857 INFO L514 BasicCegarLoop]: trace histogram [144, 143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:09:06,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 20:09:06,857 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:09:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:09:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1397443197, now seen corresponding path program 142 times [2022-01-31 20:09:06,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:09:06,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522312243] [2022-01-31 20:09:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:09:06,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:09:06,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:09:06,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:09:06,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:09:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:13,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:09:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:09:13,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:09:13,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522312243] [2022-01-31 20:09:13,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522312243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:09:13,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:09:13,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 20:09:13,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139131282] [2022-01-31 20:09:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:09:13,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 20:09:13,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:09:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 20:09:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:09:13,289 INFO L87 Difference]: Start difference. First operand 1161 states and 1305 transitions. Second operand has 147 states, 147 states have (on average 2.993197278911565) internal successors, (440), 146 states have internal predecessors, (440), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:09:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:09:21,622 INFO L93 Difference]: Finished difference Result 1897 states and 2188 transitions. [2022-01-31 20:09:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 20:09:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.993197278911565) internal successors, (440), 146 states have internal predecessors, (440), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 444 [2022-01-31 20:09:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:09:21,624 INFO L225 Difference]: With dead ends: 1897 [2022-01-31 20:09:21,624 INFO L226 Difference]: Without dead ends: 1173 [2022-01-31 20:09:21,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10734, Invalid=11022, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:09:21,626 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 1980 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 1228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2124 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1228 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:09:21,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2124 Valid, 336 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1228 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:09:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-01-31 20:09:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1169. [2022-01-31 20:09:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1020 states have (on average 1.0029411764705882) internal successors, (1023), 1020 states have internal predecessors, (1023), 146 states have call successors, (146), 3 states have call predecessors, (146), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2022-01-31 20:09:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1314 transitions. [2022-01-31 20:09:22,865 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1314 transitions. Word has length 444 [2022-01-31 20:09:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:09:22,865 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 1314 transitions. [2022-01-31 20:09:22,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.993197278911565) internal successors, (440), 146 states have internal predecessors, (440), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:09:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1314 transitions. [2022-01-31 20:09:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 20:09:22,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:09:22,867 INFO L514 BasicCegarLoop]: trace histogram [145, 144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:09:22,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 20:09:22,867 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:09:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:09:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1759349166, now seen corresponding path program 143 times [2022-01-31 20:09:22,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:09:22,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217206080] [2022-01-31 20:09:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:09:22,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:09:22,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:09:22,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:09:22,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:09:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:09:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:09:29,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:09:29,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217206080] [2022-01-31 20:09:29,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [217206080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:09:29,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:09:29,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 20:09:29,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492147479] [2022-01-31 20:09:29,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:09:29,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 20:09:29,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:09:29,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 20:09:29,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:09:29,442 INFO L87 Difference]: Start difference. First operand 1169 states and 1314 transitions. Second operand has 148 states, 148 states have (on average 2.9932432432432434) internal successors, (443), 147 states have internal predecessors, (443), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)