/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:01:11,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:01:11,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:01:11,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:01:11,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:01:11,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:01:11,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:01:11,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:01:11,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:01:11,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:01:11,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:01:11,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:01:11,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:01:11,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:01:11,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:01:11,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:01:11,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:01:11,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:01:11,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:01:11,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:01:11,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:01:11,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:01:11,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:01:11,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:01:11,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:01:11,244 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:01:11,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:01:11,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:01:11,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:01:11,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:01:11,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:11,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:01:11,245 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:01:11,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:01:11,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:01:11,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:01:11,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:01:11,609 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:01:11,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2022-01-31 17:01:11,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b3af69d/4c67e37d4b914bf281906830918d4364/FLAGc050b6a4b [2022-01-31 17:01:12,021 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:01:12,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2022-01-31 17:01:12,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b3af69d/4c67e37d4b914bf281906830918d4364/FLAGc050b6a4b [2022-01-31 17:01:12,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b3af69d/4c67e37d4b914bf281906830918d4364 [2022-01-31 17:01:12,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:01:12,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:01:12,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:12,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:01:12,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:01:12,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3260fae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12, skipping insertion in model container [2022-01-31 17:01:12,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:01:12,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:01:12,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i[820,833] [2022-01-31 17:01:12,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:12,382 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:01:12,394 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i[820,833] [2022-01-31 17:01:12,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:01:12,435 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:01:12,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12 WrapperNode [2022-01-31 17:01:12,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:01:12,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:01:12,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:01:12,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:01:12,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:01:12,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:01:12,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:01:12,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:01:12,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (1/1) ... [2022-01-31 17:01:12,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:01:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:01:12,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:01:12,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:01:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:01:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:01:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:01:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:01:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:01:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:01:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:01:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:01:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:01:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:01:12,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:01:12,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:01:12,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:01:12,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:01:12,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:01:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:01:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:01:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:01:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:01:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:01:12,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:01:12,712 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:01:12,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:01:12,895 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:01:12,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:01:12,911 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 17:01:12,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:12 BoogieIcfgContainer [2022-01-31 17:01:12,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:01:12,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:01:12,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:01:12,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:01:12,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:01:12" (1/3) ... [2022-01-31 17:01:12,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d15c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:12, skipping insertion in model container [2022-01-31 17:01:12,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:01:12" (2/3) ... [2022-01-31 17:01:12,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d15c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:01:12, skipping insertion in model container [2022-01-31 17:01:12,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:01:12" (3/3) ... [2022-01-31 17:01:12,939 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2022-01-31 17:01:12,942 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:01:12,942 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:01:13,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:01:13,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:01:13,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:01:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 17:01:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:13,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash 498599300, now seen corresponding path program 1 times [2022-01-31 17:01:13,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364206291] [2022-01-31 17:01:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364206291] [2022-01-31 17:01:13,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [364206291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:01:13,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641740365] [2022-01-31 17:01:13,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:01:13,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:01:13,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:01:13,323 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,391 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2022-01-31 17:01:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:01:13,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 17:01:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,408 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:01:13,408 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 17:01:13,420 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 17:01:13,425 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 17:01:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 17:01:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-31 17:01:13,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2022-01-31 17:01:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,479 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-31 17:01:13,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-31 17:01:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 17:01:13,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:01:13,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash 247748289, now seen corresponding path program 1 times [2022-01-31 17:01:13,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040160144] [2022-01-31 17:01:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040160144] [2022-01-31 17:01:13,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040160144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:13,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133232541] [2022-01-31 17:01:13,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:13,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:13,631 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:13,721 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-31 17:01:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:13,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 17:01:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:13,723 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:01:13,723 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 17:01:13,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,727 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:13,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 17:01:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 17:01:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 17:01:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 17:01:13,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2022-01-31 17:01:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:13,756 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 17:01:13,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 17:01:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 17:01:13,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:13,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:13,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:01:13,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1572069859, now seen corresponding path program 1 times [2022-01-31 17:01:13,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:13,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075517779] [2022-01-31 17:01:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:13,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:13,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:13,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:13,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:13,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:13,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075517779] [2022-01-31 17:01:13,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075517779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:13,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:13,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:13,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686954378] [2022-01-31 17:01:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:13,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:13,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:13,910 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,018 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-31 17:01:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 17:01:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,020 INFO L225 Difference]: With dead ends: 48 [2022-01-31 17:01:14,020 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:01:14,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:14,038 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:01:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 17:01:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 17:01:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-31 17:01:14,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2022-01-31 17:01:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,045 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-31 17:01:14,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-31 17:01:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 17:01:14,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:01:14,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1360188283, now seen corresponding path program 2 times [2022-01-31 17:01:14,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882470440] [2022-01-31 17:01:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882470440] [2022-01-31 17:01:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882470440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:14,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419956669] [2022-01-31 17:01:14,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:14,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:14,164 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,241 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-01-31 17:01:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 17:01:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,242 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:01:14,243 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 17:01:14,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:14,246 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 17:01:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 17:01:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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 17:01:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-31 17:01:14,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2022-01-31 17:01:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,251 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-31 17:01:14,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-31 17:01:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:01:14,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:01:14,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1481984524, now seen corresponding path program 1 times [2022-01-31 17:01:14,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954606630] [2022-01-31 17:01:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,280 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954606630] [2022-01-31 17:01:14,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [954606630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:01:14,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229775105] [2022-01-31 17:01:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:01:14,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:01:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:01:14,353 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,429 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-01-31 17:01:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:01:14,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 17:01:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,434 INFO L225 Difference]: With dead ends: 58 [2022-01-31 17:01:14,435 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:01:14,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:14,436 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:01:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-01-31 17:01:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 17:01:14,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2022-01-31 17:01:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,461 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 17:01:14,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 17:01:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:01:14,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:01:14,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash -490586619, now seen corresponding path program 1 times [2022-01-31 17:01:14,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420617835] [2022-01-31 17:01:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,470 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420617835] [2022-01-31 17:01:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [420617835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:01:14,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869877657] [2022-01-31 17:01:14,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:01:14,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:01:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:01:14,552 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,632 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2022-01-31 17:01:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:01:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 17:01:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,648 INFO L225 Difference]: With dead ends: 65 [2022-01-31 17:01:14,649 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 17:01:14,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:14,650 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 17:01:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-01-31 17:01:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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 17:01:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-01-31 17:01:14,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 25 [2022-01-31 17:01:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,664 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-01-31 17:01:14,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-01-31 17:01:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 17:01:14,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:01:14,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1614963860, now seen corresponding path program 2 times [2022-01-31 17:01:14,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159233649] [2022-01-31 17:01:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159233649] [2022-01-31 17:01:14,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159233649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:14,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053511367] [2022-01-31 17:01:14,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:14,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:14,775 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:14,871 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-01-31 17:01:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 17:01:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:14,874 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:01:14,874 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:01:14,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:14,875 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:14,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:01:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-01-31 17:01:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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 17:01:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-31 17:01:14,896 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 28 [2022-01-31 17:01:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:14,896 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-31 17:01:14,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-31 17:01:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:01:14,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:14,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:14,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:01:14,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1487408987, now seen corresponding path program 3 times [2022-01-31 17:01:14,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245651979] [2022-01-31 17:01:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:14,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:14,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:14,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:14,907 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:14,987 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245651979] [2022-01-31 17:01:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245651979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:14,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:14,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:01:14,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551609576] [2022-01-31 17:01:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:14,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:01:14,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:01:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:01:14,988 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,068 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-01-31 17:01:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:01:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 17:01:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,069 INFO L225 Difference]: With dead ends: 82 [2022-01-31 17:01:15,069 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:01:15,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:15,069 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:01:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-31 17:01:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 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 17:01:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-01-31 17:01:15,074 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2022-01-31 17:01:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,074 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-01-31 17:01:15,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,074 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-01-31 17:01:15,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 17:01:15,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:01:15,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash -446661309, now seen corresponding path program 4 times [2022-01-31 17:01:15,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713005688] [2022-01-31 17:01:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,189 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 17:01:15,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713005688] [2022-01-31 17:01:15,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713005688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:01:15,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683639037] [2022-01-31 17:01:15,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:01:15,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:01:15,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:01:15,190 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 17:01:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,270 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2022-01-31 17:01:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:01:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 17:01:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,271 INFO L225 Difference]: With dead ends: 84 [2022-01-31 17:01:15,271 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 17:01:15,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:15,273 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 17:01:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 17:01:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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 17:01:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-01-31 17:01:15,295 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2022-01-31 17:01:15,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,296 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-01-31 17:01:15,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 17:01:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-01-31 17:01:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:01:15,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,298 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:01:15,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1015522719, now seen corresponding path program 5 times [2022-01-31 17:01:15,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760467535] [2022-01-31 17:01:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,305 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760467535] [2022-01-31 17:01:15,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1760467535] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:01:15,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378865261] [2022-01-31 17:01:15,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:01:15,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:01:15,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:01:15,412 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,515 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-01-31 17:01:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:01:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:01:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,516 INFO L225 Difference]: With dead ends: 86 [2022-01-31 17:01:15,516 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:01:15,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:15,517 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:01:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-31 17:01:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-01-31 17:01:15,547 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2022-01-31 17:01:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,548 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-01-31 17:01:15,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-01-31 17:01:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:01:15,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,550 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:01:15,550 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2064476159, now seen corresponding path program 6 times [2022-01-31 17:01:15,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764517009] [2022-01-31 17:01:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,554 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764517009] [2022-01-31 17:01:15,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1764517009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:01:15,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351511307] [2022-01-31 17:01:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:01:15,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:01:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:01:15,662 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:15,825 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-01-31 17:01:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:01:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 17:01:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:15,827 INFO L225 Difference]: With dead ends: 88 [2022-01-31 17:01:15,828 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:01:15,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:15,830 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:15,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 50 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:01:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-31 17:01:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 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 17:01:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-01-31 17:01:15,841 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 37 [2022-01-31 17:01:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:15,841 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-01-31 17:01:15,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-01-31 17:01:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:01:15,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:15,860 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:15,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:01:15,861 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1584036323, now seen corresponding path program 7 times [2022-01-31 17:01:15,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:15,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479347258] [2022-01-31 17:01:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:15,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:15,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:15,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:15,865 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:15,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:15,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479347258] [2022-01-31 17:01:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [479347258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:15,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:15,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:01:15,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002592255] [2022-01-31 17:01:15,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:15,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:01:15,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:01:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:01:15,947 INFO L87 Difference]: Start difference. First operand 53 states and 63 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 17:01:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,063 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-01-31 17:01:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:01:16,063 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 39 [2022-01-31 17:01:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,064 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:01:16,064 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:01:16,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:16,064 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:01:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:01:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 17:01:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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 17:01:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-31 17:01:16,069 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 39 [2022-01-31 17:01:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,069 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-31 17:01:16,069 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 17:01:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-31 17:01:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:01:16,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,069 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:01:16,070 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1183749307, now seen corresponding path program 8 times [2022-01-31 17:01:16,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574902151] [2022-01-31 17:01:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574902151] [2022-01-31 17:01:16,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574902151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:01:16,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450023271] [2022-01-31 17:01:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:01:16,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:01:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:01:16,171 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,330 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-01-31 17:01:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:01:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 17:01:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,331 INFO L225 Difference]: With dead ends: 92 [2022-01-31 17:01:16,331 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:01:16,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:16,333 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:01:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-01-31 17:01:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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 17:01:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-01-31 17:01:16,345 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 41 [2022-01-31 17:01:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,345 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-01-31 17:01:16,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-01-31 17:01:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:01:16,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,346 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:01:16,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1853983783, now seen corresponding path program 9 times [2022-01-31 17:01:16,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637067661] [2022-01-31 17:01:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,368 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,457 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 17:01:16,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637067661] [2022-01-31 17:01:16,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [637067661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:01:16,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517940523] [2022-01-31 17:01:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:01:16,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:01:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:01:16,459 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,592 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-01-31 17:01:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:01:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:01:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,593 INFO L225 Difference]: With dead ends: 94 [2022-01-31 17:01:16,593 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 17:01:16,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:16,594 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 17:01:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-01-31 17:01:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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 17:01:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-01-31 17:01:16,600 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 43 [2022-01-31 17:01:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,600 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-01-31 17:01:16,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-01-31 17:01:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 17:01:16,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,600 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:01:16,601 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash -537721993, now seen corresponding path program 10 times [2022-01-31 17:01:16,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159937106] [2022-01-31 17:01:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,604 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159937106] [2022-01-31 17:01:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159937106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:01:16,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794939595] [2022-01-31 17:01:16,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:01:16,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:01:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:01:16,707 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 17:01:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:16,864 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-01-31 17:01:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:01:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 17:01:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:16,865 INFO L225 Difference]: With dead ends: 96 [2022-01-31 17:01:16,865 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:01:16,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:16,866 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:16,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:01:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-01-31 17:01:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-01-31 17:01:16,871 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 45 [2022-01-31 17:01:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:16,872 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-01-31 17:01:16,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 17:01:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-01-31 17:01:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:01:16,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:16,872 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:16,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:01:16,872 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:16,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1669473173, now seen corresponding path program 11 times [2022-01-31 17:01:16,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970776742] [2022-01-31 17:01:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:16,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:16,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:16,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:16,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:16,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970776742] [2022-01-31 17:01:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [970776742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:16,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:16,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:01:16,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066763199] [2022-01-31 17:01:16,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:16,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:01:16,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:01:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:01:16,966 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,142 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2022-01-31 17:01:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:01:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 17:01:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,144 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:01:17,144 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:01:17,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:17,144 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:01:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 17:01:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 57 states have internal predecessors, (68), 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 17:01:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-01-31 17:01:17,150 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 47 [2022-01-31 17:01:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,150 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-01-31 17:01:17,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-01-31 17:01:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 17:01:17,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,150 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:01:17,151 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1070183475, now seen corresponding path program 12 times [2022-01-31 17:01:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465542145] [2022-01-31 17:01:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465542145] [2022-01-31 17:01:17,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465542145] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:01:17,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060750927] [2022-01-31 17:01:17,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:01:17,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:01:17,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:01:17,258 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,474 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-01-31 17:01:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:01:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 17:01:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,475 INFO L225 Difference]: With dead ends: 100 [2022-01-31 17:01:17,475 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:01:17,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:17,476 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 45 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:01:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 17:01:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 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 17:01:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-01-31 17:01:17,494 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 49 [2022-01-31 17:01:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,494 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-01-31 17:01:17,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-01-31 17:01:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:01:17,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,494 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:01:17,495 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 678401361, now seen corresponding path program 13 times [2022-01-31 17:01:17,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955292402] [2022-01-31 17:01:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:17,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955292402] [2022-01-31 17:01:17,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [955292402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:01:17,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804452464] [2022-01-31 17:01:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:01:17,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:01:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:01:17,614 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 17:01:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:17,829 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-01-31 17:01:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:01:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:01:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:17,830 INFO L225 Difference]: With dead ends: 102 [2022-01-31 17:01:17,830 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 17:01:17,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:17,831 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:17,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 17:01:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-31 17:01:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 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 17:01:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-01-31 17:01:17,836 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 51 [2022-01-31 17:01:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:17,836 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-01-31 17:01:17,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 17:01:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-01-31 17:01:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:01:17,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:17,837 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:17,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:01:17,837 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2132911855, now seen corresponding path program 14 times [2022-01-31 17:01:17,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:17,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858647339] [2022-01-31 17:01:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:17,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:17,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:17,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:17,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:17,967 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 17:01:17,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:17,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858647339] [2022-01-31 17:01:17,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858647339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:17,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:17,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:01:17,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737388919] [2022-01-31 17:01:17,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:01:17,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:01:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:01:17,968 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,172 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-01-31 17:01:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:01:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 17:01:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,172 INFO L225 Difference]: With dead ends: 104 [2022-01-31 17:01:18,173 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:01:18,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:18,173 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 45 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:01:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-01-31 17:01:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 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 17:01:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-01-31 17:01:18,179 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 53 [2022-01-31 17:01:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,179 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-01-31 17:01:18,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-01-31 17:01:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:01:18,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,180 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:01:18,180 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash -241841907, now seen corresponding path program 15 times [2022-01-31 17:01:18,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559479990] [2022-01-31 17:01:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:18,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559479990] [2022-01-31 17:01:18,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559479990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:01:18,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009334376] [2022-01-31 17:01:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:01:18,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:01:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:01:18,318 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,491 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2022-01-31 17:01:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:01:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 17:01:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,492 INFO L225 Difference]: With dead ends: 106 [2022-01-31 17:01:18,492 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:01:18,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:18,493 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 50 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:01:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-31 17:01:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-31 17:01:18,498 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 55 [2022-01-31 17:01:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,498 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-31 17:01:18,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-31 17:01:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:01:18,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,501 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:01:18,501 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1752573013, now seen corresponding path program 16 times [2022-01-31 17:01:18,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521319141] [2022-01-31 17:01:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:18,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:18,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521319141] [2022-01-31 17:01:18,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521319141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:18,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:18,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:01:18,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335335470] [2022-01-31 17:01:18,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:18,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:01:18,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:01:18,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:01:18,651 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 17:01:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:18,858 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-01-31 17:01:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:01:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 17:01:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:18,859 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:01:18,859 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:01:18,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:18,860 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:18,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 45 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:01:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-01-31 17:01:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 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 17:01:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-01-31 17:01:18,865 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 57 [2022-01-31 17:01:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:18,865 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-01-31 17:01:18,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 17:01:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-01-31 17:01:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:01:18,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:18,866 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:18,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:01:18,866 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:18,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1866219831, now seen corresponding path program 17 times [2022-01-31 17:01:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292291170] [2022-01-31 17:01:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:18,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:18,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:18,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:18,885 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:19,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292291170] [2022-01-31 17:01:19,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292291170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:01:19,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316792643] [2022-01-31 17:01:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:01:19,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:01:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:01:19,135 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,400 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-01-31 17:01:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:01:19,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:01:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,402 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:01:19,402 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:01:19,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:19,403 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 55 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:01:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-01-31 17:01:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 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 17:01:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-01-31 17:01:19,409 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 59 [2022-01-31 17:01:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-01-31 17:01:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-01-31 17:01:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:01:19,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,409 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:01:19,410 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash 588337767, now seen corresponding path program 18 times [2022-01-31 17:01:19,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071119498] [2022-01-31 17:01:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,412 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:19,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071119498] [2022-01-31 17:01:19,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071119498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:19,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:19,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:01:19,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041027737] [2022-01-31 17:01:19,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:19,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:01:19,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:01:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:01:19,579 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:19,888 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-01-31 17:01:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:01:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 17:01:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:19,889 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:01:19,889 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:01:19,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:19,890 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:19,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 45 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:01:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-01-31 17:01:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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 17:01:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-01-31 17:01:19,896 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 61 [2022-01-31 17:01:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:19,896 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-01-31 17:01:19,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-01-31 17:01:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:01:19,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:19,896 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:19,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:01:19,897 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1481143941, now seen corresponding path program 19 times [2022-01-31 17:01:19,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:19,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384800069] [2022-01-31 17:01:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:19,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:19,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:19,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:19,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:20,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384800069] [2022-01-31 17:01:20,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [384800069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:01:20,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725252984] [2022-01-31 17:01:20,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:01:20,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:01:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:01:20,106 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 17:01:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:20,435 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2022-01-31 17:01:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:01:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 17:01:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:20,436 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:01:20,436 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:01:20,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:20,437 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:20,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:01:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 17:01:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 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 17:01:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-01-31 17:01:20,445 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 63 [2022-01-31 17:01:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:20,445 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-01-31 17:01:20,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 17:01:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-01-31 17:01:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:01:20,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:20,446 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:20,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:01:20,446 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 474417955, now seen corresponding path program 20 times [2022-01-31 17:01:20,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:20,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74877206] [2022-01-31 17:01:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:20,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:20,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:20,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:20,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:20,736 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 17:01:20,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74877206] [2022-01-31 17:01:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [74877206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:20,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:20,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:01:20,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303848579] [2022-01-31 17:01:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:20,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:01:20,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:01:20,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:01:20,738 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,060 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2022-01-31 17:01:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:01:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 17:01:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,061 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:01:21,061 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:01:21,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:01:21,063 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 50 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:01:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-31 17:01:21,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 75 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-01-31 17:01:21,071 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 65 [2022-01-31 17:01:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,072 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-01-31 17:01:21,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-01-31 17:01:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:01:21,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,072 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:01:21,073 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash -621612991, now seen corresponding path program 21 times [2022-01-31 17:01:21,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083566538] [2022-01-31 17:01:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,093 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083566538] [2022-01-31 17:01:21,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083566538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:01:21,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459687598] [2022-01-31 17:01:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:01:21,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:01:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:01:21,361 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:21,666 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2022-01-31 17:01:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:01:21,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 17:01:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:21,667 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:01:21,667 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:01:21,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:01:21,668 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:21,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 50 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:01:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 17:01:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 77 states have internal predecessors, (88), 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 17:01:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-01-31 17:01:21,675 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 67 [2022-01-31 17:01:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-01-31 17:01:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-01-31 17:01:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:01:21,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:21,675 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:21,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:01:21,676 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1640364577, now seen corresponding path program 22 times [2022-01-31 17:01:21,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080809525] [2022-01-31 17:01:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:21,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:21,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:21,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:21,678 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:21,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080809525] [2022-01-31 17:01:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1080809525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:21,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:21,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:01:21,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786614174] [2022-01-31 17:01:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:21,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:01:21,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:01:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:01:21,907 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 17:01:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,269 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2022-01-31 17:01:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:01:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 17:01:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,270 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:01:22,270 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:01:22,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:22,271 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 55 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:01:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-01-31 17:01:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 states have internal predecessors, (90), 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 17:01:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-01-31 17:01:22,278 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 69 [2022-01-31 17:01:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,278 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-01-31 17:01:22,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 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 17:01:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-01-31 17:01:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:01:22,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,302 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:22,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:01:22,302 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1408095235, now seen corresponding path program 23 times [2022-01-31 17:01:22,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786377294] [2022-01-31 17:01:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,305 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:22,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:22,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786377294] [2022-01-31 17:01:22,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786377294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:22,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:22,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:01:22,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753538766] [2022-01-31 17:01:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:22,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:01:22,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:01:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:01:22,568 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:22,925 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2022-01-31 17:01:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:01:22,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:01:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:22,926 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:01:22,926 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:01:22,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:01:22,927 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:22,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 45 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:01:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-01-31 17:01:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 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 17:01:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-01-31 17:01:22,935 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 71 [2022-01-31 17:01:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:22,935 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-01-31 17:01:22,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-01-31 17:01:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:01:22,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:22,935 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:22,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:01:22,936 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1535556965, now seen corresponding path program 24 times [2022-01-31 17:01:22,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:22,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145607086] [2022-01-31 17:01:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:22,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:22,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:22,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:22,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,197 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 17:01:23,197 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145607086] [2022-01-31 17:01:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145607086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:01:23,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939353902] [2022-01-31 17:01:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:01:23,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:01:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:01:23,198 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:23,572 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-01-31 17:01:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:01:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 17:01:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:23,573 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:01:23,573 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:01:23,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:23,574 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:23,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 60 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:01:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-01-31 17:01:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 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 17:01:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-01-31 17:01:23,581 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 73 [2022-01-31 17:01:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:23,582 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-01-31 17:01:23,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-01-31 17:01:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:01:23,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:23,582 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:23,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:01:23,582 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:23,583 INFO L85 PathProgramCache]: Analyzing trace with hash 527772089, now seen corresponding path program 25 times [2022-01-31 17:01:23,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:23,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942148536] [2022-01-31 17:01:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:23,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:23,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:23,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:23,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:23,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942148536] [2022-01-31 17:01:23,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942148536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:23,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:23,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:01:23,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501642431] [2022-01-31 17:01:23,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:23,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:01:23,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:01:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:01:23,859 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 17:01:24,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,254 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2022-01-31 17:01:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:01:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:01:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,256 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:01:24,256 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 17:01:24,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:01:24,257 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 40 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:24,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 17:01:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-01-31 17:01:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 85 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-01-31 17:01:24,265 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 75 [2022-01-31 17:01:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,265 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-01-31 17:01:24,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 17:01:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-01-31 17:01:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:01:24,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,265 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:01:24,265 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash -887897769, now seen corresponding path program 26 times [2022-01-31 17:01:24,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959691941] [2022-01-31 17:01:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,267 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:24,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:24,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959691941] [2022-01-31 17:01:24,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [959691941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:24,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:24,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:01:24,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098911387] [2022-01-31 17:01:24,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:24,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:01:24,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:01:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:01:24,534 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:24,970 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-01-31 17:01:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:01:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 17:01:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:24,971 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:01:24,971 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:01:24,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:01:24,973 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:24,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 45 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:01:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-01-31 17:01:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 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 17:01:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-01-31 17:01:24,980 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 77 [2022-01-31 17:01:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:24,981 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-01-31 17:01:24,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-01-31 17:01:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:01:24,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:24,981 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:24,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:01:24,982 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash 158001525, now seen corresponding path program 27 times [2022-01-31 17:01:24,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:24,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429460716] [2022-01-31 17:01:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:24,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:24,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:24,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:24,985 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:25,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:25,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429460716] [2022-01-31 17:01:25,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429460716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:25,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:25,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:01:25,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900754461] [2022-01-31 17:01:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:25,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:01:25,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:01:25,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:01:25,331 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:25,770 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2022-01-31 17:01:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:01:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 17:01:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:25,771 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:01:25,771 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:01:25,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:01:25,772 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:25,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 60 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:01:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-31 17:01:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 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 17:01:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-01-31 17:01:25,800 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 79 [2022-01-31 17:01:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:25,800 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-01-31 17:01:25,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-01-31 17:01:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:01:25,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:25,801 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:25,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:01:25,801 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:25,801 INFO L85 PathProgramCache]: Analyzing trace with hash 244875795, now seen corresponding path program 28 times [2022-01-31 17:01:25,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:25,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640908385] [2022-01-31 17:01:25,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:25,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:25,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:25,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:25,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:26,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:26,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640908385] [2022-01-31 17:01:26,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640908385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:26,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:26,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:01:26,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807673990] [2022-01-31 17:01:26,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:26,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:01:26,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:01:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:01:26,208 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 17:01:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:26,652 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2022-01-31 17:01:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:01:26,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 17:01:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:26,653 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:01:26,653 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:01:26,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:01:26,655 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:26,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 50 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:01:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 17:01:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 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 17:01:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2022-01-31 17:01:26,671 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 81 [2022-01-31 17:01:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:26,671 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2022-01-31 17:01:26,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 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 17:01:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2022-01-31 17:01:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:01:26,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:26,672 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:26,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:01:26,672 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2126670641, now seen corresponding path program 29 times [2022-01-31 17:01:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:26,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653288848] [2022-01-31 17:01:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:26,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:26,674 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:26,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:26,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:27,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653288848] [2022-01-31 17:01:27,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653288848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:27,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:27,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:01:27,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900006975] [2022-01-31 17:01:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:27,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:01:27,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:01:27,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:01:27,047 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:27,503 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2022-01-31 17:01:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:01:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:01:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:27,504 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:01:27,504 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 17:01:27,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:01:27,505 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:27,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 35 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 17:01:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-01-31 17:01:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 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 17:01:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2022-01-31 17:01:27,515 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 83 [2022-01-31 17:01:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:27,515 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2022-01-31 17:01:27,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2022-01-31 17:01:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:01:27,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:27,515 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:27,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:01:27,516 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1944681265, now seen corresponding path program 30 times [2022-01-31 17:01:27,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:27,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471983140] [2022-01-31 17:01:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:27,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:27,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:27,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:27,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:27,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:27,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471983140] [2022-01-31 17:01:27,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [471983140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:27,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:27,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:01:27,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532190767] [2022-01-31 17:01:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:27,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:01:27,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:01:27,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:01:27,901 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:28,421 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2022-01-31 17:01:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:01:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 17:01:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:28,422 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:01:28,422 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:01:28,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:01:28,424 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:28,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 60 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:01:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-31 17:01:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-01-31 17:01:28,439 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 85 [2022-01-31 17:01:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:28,439 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-01-31 17:01:28,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-01-31 17:01:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:01:28,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:28,440 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:28,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:01:28,440 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1798656275, now seen corresponding path program 31 times [2022-01-31 17:01:28,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:28,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977910330] [2022-01-31 17:01:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:28,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:28,442 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:28,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:28,443 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:28,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:28,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977910330] [2022-01-31 17:01:28,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [977910330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:28,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:28,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:01:28,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709245984] [2022-01-31 17:01:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:28,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:01:28,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:01:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:01:28,839 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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 17:01:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:29,379 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2022-01-31 17:01:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:01:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 17:01:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:29,380 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:01:29,380 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:01:29,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:01:29,403 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:29,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 45 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:01:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-01-31 17:01:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 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 17:01:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2022-01-31 17:01:29,420 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 87 [2022-01-31 17:01:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2022-01-31 17:01:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 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 17:01:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2022-01-31 17:01:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:01:29,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:29,430 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:29,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:01:29,431 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:29,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1092405643, now seen corresponding path program 32 times [2022-01-31 17:01:29,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:29,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071608969] [2022-01-31 17:01:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:29,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:29,433 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:29,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:29,448 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:29,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:29,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071608969] [2022-01-31 17:01:29,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071608969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:29,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:29,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:01:29,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443483824] [2022-01-31 17:01:29,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:29,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:01:29,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:01:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:01:29,952 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:30,522 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2022-01-31 17:01:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:01:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 17:01:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:30,523 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:01:30,523 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:01:30,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:01:30,524 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:30,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 55 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:01:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-01-31 17:01:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 17:01:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2022-01-31 17:01:30,534 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 89 [2022-01-31 17:01:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2022-01-31 17:01:30,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2022-01-31 17:01:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:01:30,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:30,535 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:30,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:01:30,535 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 559068329, now seen corresponding path program 33 times [2022-01-31 17:01:30,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:30,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145710958] [2022-01-31 17:01:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:30,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:30,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:30,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:30,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:30,927 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 17:01:30,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:30,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145710958] [2022-01-31 17:01:30,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145710958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:30,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:30,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:01:30,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636914869] [2022-01-31 17:01:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:30,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:01:30,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:30,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:01:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:01:30,929 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:31,525 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2022-01-31 17:01:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:01:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:01:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:31,526 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:01:31,526 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 17:01:31,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:01:31,527 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:31,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 45 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 17:01:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-01-31 17:01:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.108910891089109) internal successors, (112), 101 states have internal predecessors, (112), 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 17:01:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-01-31 17:01:31,563 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 91 [2022-01-31 17:01:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:31,563 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-01-31 17:01:31,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-01-31 17:01:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:01:31,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:31,564 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:31,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:01:31,564 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash -876982201, now seen corresponding path program 34 times [2022-01-31 17:01:31,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:31,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594641921] [2022-01-31 17:01:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:31,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:31,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:31,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:31,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:31,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:31,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594641921] [2022-01-31 17:01:31,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [594641921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:31,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:31,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:01:31,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845163805] [2022-01-31 17:01:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:31,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:01:31,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:01:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:01:31,963 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 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 17:01:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:32,541 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2022-01-31 17:01:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:01:32,541 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 17:01:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:32,542 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:01:32,542 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 17:01:32,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:01:32,543 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:32,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 40 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 17:01:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-01-31 17:01:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 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 17:01:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-01-31 17:01:32,556 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 93 [2022-01-31 17:01:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:32,556 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-01-31 17:01:32,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 36 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 17:01:32,556 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-01-31 17:01:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:01:32,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:32,557 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:32,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:01:32,557 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2057927781, now seen corresponding path program 35 times [2022-01-31 17:01:32,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:32,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256984992] [2022-01-31 17:01:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:32,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:32,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:32,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:32,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:33,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:33,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256984992] [2022-01-31 17:01:33,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1256984992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:33,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:33,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:01:33,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206464015] [2022-01-31 17:01:33,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:33,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:01:33,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:01:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:01:33,034 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:33,709 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2022-01-31 17:01:33,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:01:33,709 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:01:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:33,710 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:01:33,710 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:01:33,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:01:33,712 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:33,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 55 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:01:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-31 17:01:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-01-31 17:01:33,729 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 95 [2022-01-31 17:01:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:33,729 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-01-31 17:01:33,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-01-31 17:01:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:01:33,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:33,730 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:33,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:01:33,730 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash 712907011, now seen corresponding path program 36 times [2022-01-31 17:01:33,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:33,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925251666] [2022-01-31 17:01:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:33,733 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:33,733 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:33,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:33,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:34,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:34,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925251666] [2022-01-31 17:01:34,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925251666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:34,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:34,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:01:34,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363992268] [2022-01-31 17:01:34,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:34,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:01:34,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:34,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:01:34,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:01:34,219 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:34,853 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2022-01-31 17:01:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:01:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 17:01:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:34,855 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:01:34,855 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:01:34,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:01:34,856 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:34,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 45 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:01:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-01-31 17:01:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.102803738317757) internal successors, (118), 107 states have internal predecessors, (118), 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 17:01:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2022-01-31 17:01:34,867 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 97 [2022-01-31 17:01:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:34,867 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2022-01-31 17:01:34,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2022-01-31 17:01:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:01:34,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:34,868 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:34,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:01:34,869 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash 933103137, now seen corresponding path program 37 times [2022-01-31 17:01:34,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:34,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094074764] [2022-01-31 17:01:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:34,872 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:34,872 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:34,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:34,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:35,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094074764] [2022-01-31 17:01:35,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094074764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:35,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:35,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:01:35,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112757422] [2022-01-31 17:01:35,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:35,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:01:35,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:01:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:01:35,226 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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 17:01:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:35,760 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2022-01-31 17:01:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:01:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:01:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:35,761 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:01:35,761 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 17:01:35,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:01:35,762 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:35,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 50 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 17:01:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-31 17:01:35,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 109 states have internal predecessors, (120), 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 17:01:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-01-31 17:01:35,790 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 99 [2022-01-31 17:01:35,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:35,790 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-01-31 17:01:35,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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 17:01:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-01-31 17:01:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:01:35,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:35,791 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:35,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:01:35,791 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2088182719, now seen corresponding path program 38 times [2022-01-31 17:01:35,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:35,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891751232] [2022-01-31 17:01:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:35,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:35,794 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:35,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:35,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:36,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:36,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891751232] [2022-01-31 17:01:36,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891751232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:36,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:36,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:01:36,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008507440] [2022-01-31 17:01:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:36,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:01:36,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:01:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:01:36,287 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:36,771 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2022-01-31 17:01:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:01:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 17:01:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:36,775 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:01:36,775 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:01:36,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:01:36,779 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:36,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 55 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:01:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-01-31 17:01:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 111 states have internal predecessors, (122), 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 17:01:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2022-01-31 17:01:36,792 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 101 [2022-01-31 17:01:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:36,792 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2022-01-31 17:01:36,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 40 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2022-01-31 17:01:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:01:36,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:36,808 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:36,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:01:36,808 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash -276868643, now seen corresponding path program 39 times [2022-01-31 17:01:36,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:36,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000360485] [2022-01-31 17:01:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:36,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:36,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:36,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:36,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:37,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:37,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000360485] [2022-01-31 17:01:37,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000360485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:37,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:37,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:01:37,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588127495] [2022-01-31 17:01:37,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:37,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:01:37,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:01:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:01:37,278 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:37,954 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2022-01-31 17:01:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:01:37,954 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 17:01:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:37,955 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:01:37,955 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:01:37,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:01:37,967 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:37,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 60 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:01:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-01-31 17:01:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 113 states have internal predecessors, (124), 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 17:01:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2022-01-31 17:01:37,982 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 103 [2022-01-31 17:01:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:37,983 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2022-01-31 17:01:37,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:37,983 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2022-01-31 17:01:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:01:37,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:37,983 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:01:37,984 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1053527941, now seen corresponding path program 40 times [2022-01-31 17:01:37,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:37,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130150836] [2022-01-31 17:01:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:37,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:37,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:38,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:38,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:38,421 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130150836] [2022-01-31 17:01:38,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130150836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:38,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:38,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:01:38,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690580351] [2022-01-31 17:01:38,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:01:38,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:01:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:01:38,423 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 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 17:01:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:39,184 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2022-01-31 17:01:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:01:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 17:01:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:39,185 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:01:39,185 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 17:01:39,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:01:39,186 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:39,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 45 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 17:01:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-01-31 17:01:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-01-31 17:01:39,200 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 105 [2022-01-31 17:01:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:39,200 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-01-31 17:01:39,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 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 17:01:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-01-31 17:01:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:01:39,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:39,200 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:39,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:01:39,201 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash -98803815, now seen corresponding path program 41 times [2022-01-31 17:01:39,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:39,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504118813] [2022-01-31 17:01:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:39,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:39,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:39,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:39,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:39,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:39,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:39,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504118813] [2022-01-31 17:01:39,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504118813] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:39,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:39,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:01:39,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506989503] [2022-01-31 17:01:39,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:39,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:01:39,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:01:39,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:01:39,814 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:40,598 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2022-01-31 17:01:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:01:40,599 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:01:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:40,599 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:01:40,599 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:01:40,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:01:40,601 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:40,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 45 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:01:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-01-31 17:01:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 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 17:01:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2022-01-31 17:01:40,634 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2022-01-31 17:01:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:40,634 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2022-01-31 17:01:40,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2022-01-31 17:01:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:01:40,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:40,639 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:40,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:01:40,639 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1731920073, now seen corresponding path program 42 times [2022-01-31 17:01:40,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164748989] [2022-01-31 17:01:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:40,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:40,641 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:40,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:40,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:41,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:41,318 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 17:01:41,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164748989] [2022-01-31 17:01:41,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [164748989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:41,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:41,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:01:41,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664028668] [2022-01-31 17:01:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:41,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:01:41,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:01:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:01:41,320 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 44 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:41,876 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2022-01-31 17:01:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:01:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 44 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 17:01:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:41,877 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:01:41,877 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:01:41,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:01:41,878 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:41,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 55 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:01:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-01-31 17:01:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 119 states have internal predecessors, (130), 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 17:01:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-01-31 17:01:41,899 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 109 [2022-01-31 17:01:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:41,899 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-01-31 17:01:41,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 44 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-01-31 17:01:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:01:41,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:41,900 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:41,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:01:41,900 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash 801386325, now seen corresponding path program 43 times [2022-01-31 17:01:41,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:41,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245847438] [2022-01-31 17:01:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:41,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:41,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:41,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:41,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:42,624 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 17:01:42,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:42,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245847438] [2022-01-31 17:01:42,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245847438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:42,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:42,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:01:42,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853480748] [2022-01-31 17:01:42,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:42,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:01:42,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:01:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:01:42,626 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 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 17:01:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:43,508 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-01-31 17:01:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:01:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:01:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:43,509 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:01:43,509 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:01:43,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:01:43,511 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:43,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 50 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:01:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-01-31 17:01:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 121 states have internal predecessors, (132), 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 17:01:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2022-01-31 17:01:43,531 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 111 [2022-01-31 17:01:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:43,531 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2022-01-31 17:01:43,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 45 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 17:01:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2022-01-31 17:01:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:01:43,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:43,532 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:43,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:01:43,532 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash 62377971, now seen corresponding path program 44 times [2022-01-31 17:01:43,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:43,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044335573] [2022-01-31 17:01:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:43,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:43,535 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:43,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:43,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:44,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:44,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044335573] [2022-01-31 17:01:44,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044335573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:44,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:44,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:01:44,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754447779] [2022-01-31 17:01:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:44,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:01:44,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:01:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:01:44,246 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:45,057 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2022-01-31 17:01:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:01:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 17:01:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:45,058 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:01:45,058 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:01:45,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:01:45,059 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:45,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 65 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:01:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-31 17:01:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 123 states have (on average 1.089430894308943) internal successors, (134), 123 states have internal predecessors, (134), 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 17:01:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-01-31 17:01:45,078 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 113 [2022-01-31 17:01:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:45,078 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-01-31 17:01:45,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 46 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-01-31 17:01:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:01:45,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:45,079 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:45,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:01:45,104 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1455046383, now seen corresponding path program 45 times [2022-01-31 17:01:45,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240506335] [2022-01-31 17:01:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:45,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:45,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:45,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:45,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:45,624 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 17:01:45,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240506335] [2022-01-31 17:01:45,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [240506335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:45,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:45,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:01:45,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598970301] [2022-01-31 17:01:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:45,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:01:45,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:01:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:01:45,625 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:46,277 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2022-01-31 17:01:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:01:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:01:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:46,291 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:01:46,291 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:01:46,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:01:46,292 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:46,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 70 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:01:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-01-31 17:01:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2022-01-31 17:01:46,342 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 115 [2022-01-31 17:01:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:46,342 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2022-01-31 17:01:46,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2022-01-31 17:01:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:01:46,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:46,343 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:46,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:01:46,343 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash 589030063, now seen corresponding path program 46 times [2022-01-31 17:01:46,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:46,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288838558] [2022-01-31 17:01:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:46,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:46,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:46,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:46,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:46,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288838558] [2022-01-31 17:01:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [288838558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:46,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:46,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:01:46,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055794884] [2022-01-31 17:01:46,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:46,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:01:46,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:01:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:01:46,876 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 48 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 17:01:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:47,611 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-01-31 17:01:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:01:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 48 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 17:01:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:47,612 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:01:47,612 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:01:47,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:01:47,618 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:47,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:01:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-01-31 17:01:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 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 17:01:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-01-31 17:01:47,665 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 117 [2022-01-31 17:01:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:47,665 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-01-31 17:01:47,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 48 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 17:01:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-01-31 17:01:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:01:47,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:47,667 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:47,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:01:47,667 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:47,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2146440397, now seen corresponding path program 47 times [2022-01-31 17:01:47,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:47,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98771990] [2022-01-31 17:01:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:47,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:47,670 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:47,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:47,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:48,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98771990] [2022-01-31 17:01:48,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [98771990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:48,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:48,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:01:48,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000204558] [2022-01-31 17:01:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:48,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:01:48,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:01:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:01:48,486 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:49,495 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2022-01-31 17:01:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:01:49,496 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:01:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:49,496 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:01:49,496 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:01:49,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:01:49,498 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:49,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 65 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:01:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-01-31 17:01:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 129 states have internal predecessors, (140), 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 17:01:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2022-01-31 17:01:49,515 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 119 [2022-01-31 17:01:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:49,515 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2022-01-31 17:01:49,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2022-01-31 17:01:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:01:49,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:49,516 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:49,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:01:49,516 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash -125814933, now seen corresponding path program 48 times [2022-01-31 17:01:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:49,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926083906] [2022-01-31 17:01:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:49,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:49,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:49,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:49,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:50,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926083906] [2022-01-31 17:01:50,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [926083906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:50,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:50,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:01:50,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151835997] [2022-01-31 17:01:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:50,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:01:50,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:01:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:01:50,344 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:51,447 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2022-01-31 17:01:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:01:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 17:01:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:51,448 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:01:51,448 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:01:51,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:01:51,450 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 120 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:51,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 45 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:01:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-01-31 17:01:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 131 states have (on average 1.083969465648855) internal successors, (142), 131 states have internal predecessors, (142), 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 17:01:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2022-01-31 17:01:51,470 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 121 [2022-01-31 17:01:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:51,470 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2022-01-31 17:01:51,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 50 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2022-01-31 17:01:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:01:51,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:51,471 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:51,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:01:51,471 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1919800695, now seen corresponding path program 49 times [2022-01-31 17:01:51,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:51,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906020500] [2022-01-31 17:01:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:51,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:51,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:51,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:51,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:52,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:52,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906020500] [2022-01-31 17:01:52,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [906020500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:52,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:52,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:01:52,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767806747] [2022-01-31 17:01:52,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:52,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:01:52,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:01:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:01:52,376 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 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 17:01:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:53,468 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2022-01-31 17:01:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:01:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:01:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:53,469 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:01:53,469 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 17:01:53,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:01:53,471 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:53,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 50 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 17:01:53,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-01-31 17:01:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 133 states have internal predecessors, (144), 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 17:01:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2022-01-31 17:01:53,490 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 123 [2022-01-31 17:01:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:53,490 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2022-01-31 17:01:53,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 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 17:01:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2022-01-31 17:01:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:01:53,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:53,490 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:53,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:01:53,491 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 636735015, now seen corresponding path program 50 times [2022-01-31 17:01:53,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230326780] [2022-01-31 17:01:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:53,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:53,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:53,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:53,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:54,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:54,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230326780] [2022-01-31 17:01:54,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230326780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:54,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:54,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:01:54,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881694366] [2022-01-31 17:01:54,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:54,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:01:54,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:01:54,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:01:54,442 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:55,587 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2022-01-31 17:01:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:01:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 17:01:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:55,588 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:01:55,588 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:01:55,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:01:55,589 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:55,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 65 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:01:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-01-31 17:01:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 135 states have (on average 1.0814814814814815) internal successors, (146), 135 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:01:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2022-01-31 17:01:55,608 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 125 [2022-01-31 17:01:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:55,608 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2022-01-31 17:01:55,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.169811320754717) internal successors, (115), 52 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2022-01-31 17:01:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:01:55,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:55,609 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:55,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:01:55,609 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash 746259013, now seen corresponding path program 51 times [2022-01-31 17:01:55,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:55,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143507906] [2022-01-31 17:01:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:55,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:55,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:55,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:55,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:56,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:56,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143507906] [2022-01-31 17:01:56,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143507906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:56,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:56,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:01:56,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987765374] [2022-01-31 17:01:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:56,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:01:56,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:01:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:01:56,326 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:57,238 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2022-01-31 17:01:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:01:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 17:01:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:57,239 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:01:57,239 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:01:57,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:01:57,248 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:57,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 60 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:01:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-01-31 17:01:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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 17:01:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2022-01-31 17:01:57,269 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 127 [2022-01-31 17:01:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:57,269 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2022-01-31 17:01:57,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 53 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:01:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2022-01-31 17:01:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:01:57,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:57,270 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:57,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:01:57,270 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:57,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1375361309, now seen corresponding path program 52 times [2022-01-31 17:01:57,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:57,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573079075] [2022-01-31 17:01:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:57,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:57,272 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:57,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:57,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:58,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:58,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573079075] [2022-01-31 17:01:58,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [573079075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:58,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:58,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:01:58,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213320643] [2022-01-31 17:01:58,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:58,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:01:58,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:01:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:01:58,270 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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 17:01:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:01:59,109 INFO L93 Difference]: Finished difference Result 180 states and 200 transitions. [2022-01-31 17:01:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:01:59,109 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 17:01:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:01:59,110 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:01:59,110 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:01:59,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:01:59,112 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 128 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:01:59,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 45 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:01:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:01:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-01-31 17:01:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 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 17:01:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2022-01-31 17:01:59,150 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 129 [2022-01-31 17:01:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:01:59,150 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2022-01-31 17:01:59,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 54 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 17:01:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2022-01-31 17:01:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:01:59,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:01:59,151 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:01:59,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:01:59,151 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:01:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:01:59,151 INFO L85 PathProgramCache]: Analyzing trace with hash -143025151, now seen corresponding path program 53 times [2022-01-31 17:01:59,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:01:59,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104614991] [2022-01-31 17:01:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:01:59,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:01:59,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:01:59,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:01:59,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:01:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:01:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:01:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:01:59,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:01:59,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104614991] [2022-01-31 17:01:59,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104614991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:01:59,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:01:59,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:01:59,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656938338] [2022-01-31 17:01:59,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:01:59,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:01:59,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:01:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:01:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:01:59,938 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:00,761 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2022-01-31 17:02:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:02:00,761 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:02:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:00,771 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:02:00,771 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 17:02:00,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:02:00,779 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:00,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 45 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 17:02:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-01-31 17:02:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 141 states have internal predecessors, (152), 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 17:02:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2022-01-31 17:02:00,804 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 131 [2022-01-31 17:02:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:00,804 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2022-01-31 17:02:00,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 55 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2022-01-31 17:02:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:02:00,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:00,805 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:00,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:02:00,805 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1278951009, now seen corresponding path program 54 times [2022-01-31 17:02:00,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:00,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514976841] [2022-01-31 17:02:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:00,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:00,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:00,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:00,809 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:01,871 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 17:02:01,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:01,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514976841] [2022-01-31 17:02:01,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514976841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:01,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:01,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:02:01,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908566713] [2022-01-31 17:02:01,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:01,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:02:01,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:01,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:02:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:02:01,873 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:02,850 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2022-01-31 17:02:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:02:02,850 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 17:02:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:02,853 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:02:02,853 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:02:02,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:02:02,855 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:02,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 55 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:02:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-01-31 17:02:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.0769230769230769) internal successors, (154), 143 states have internal predecessors, (154), 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 17:02:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 159 transitions. [2022-01-31 17:02:02,897 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 159 transitions. Word has length 133 [2022-01-31 17:02:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:02,898 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 159 transitions. [2022-01-31 17:02:02,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 56 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 159 transitions. [2022-01-31 17:02:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:02:02,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:02,898 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:02,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:02:02,899 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1982007363, now seen corresponding path program 55 times [2022-01-31 17:02:02,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:02,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257405628] [2022-01-31 17:02:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:02,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:02,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:02,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:02,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:03,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:03,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257405628] [2022-01-31 17:02:03,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257405628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:03,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:03,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:02:03,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462641691] [2022-01-31 17:02:03,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:03,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:02:03,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:02:03,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:02:03,619 INFO L87 Difference]: Start difference. First operand 149 states and 159 transitions. Second operand has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 57 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 17:02:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:04,657 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2022-01-31 17:02:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:02:04,657 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 57 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:02:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:04,658 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:02:04,658 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:02:04,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:02:04,659 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:04,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 40 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:02:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-01-31 17:02:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.0758620689655172) internal successors, (156), 145 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2022-01-31 17:02:04,681 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 135 [2022-01-31 17:02:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:04,681 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2022-01-31 17:02:04,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 57 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 17:02:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2022-01-31 17:02:04,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:02:04,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:04,682 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:04,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:02:04,682 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 985669211, now seen corresponding path program 56 times [2022-01-31 17:02:04,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:04,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099444060] [2022-01-31 17:02:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:04,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:04,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:04,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:04,686 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:05,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:05,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099444060] [2022-01-31 17:02:05,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099444060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:05,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:05,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:02:05,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934417735] [2022-01-31 17:02:05,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:05,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:02:05,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:02:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:02:05,600 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:06,912 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2022-01-31 17:02:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:02:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 17:02:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:06,913 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:02:06,913 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:02:06,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:02:06,915 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:06,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 50 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:02:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-01-31 17:02:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 147 states have internal predecessors, (158), 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 17:02:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2022-01-31 17:02:06,944 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 137 [2022-01-31 17:02:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:06,944 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2022-01-31 17:02:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 58 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2022-01-31 17:02:06,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:02:06,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:06,952 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:06,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:02:06,952 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:06,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1064572281, now seen corresponding path program 57 times [2022-01-31 17:02:06,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:06,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391439702] [2022-01-31 17:02:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:06,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:06,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:06,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:06,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:08,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:08,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:08,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391439702] [2022-01-31 17:02:08,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1391439702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:08,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:08,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:02:08,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311393696] [2022-01-31 17:02:08,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:08,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:02:08,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:08,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:02:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:02:08,124 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:09,519 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2022-01-31 17:02:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:02:09,519 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:02:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:09,520 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:02:09,520 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 17:02:09,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:02:09,522 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:09,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 50 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:09,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 17:02:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-01-31 17:02:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.0738255033557047) internal successors, (160), 149 states have internal predecessors, (160), 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 17:02:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2022-01-31 17:02:09,545 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 139 [2022-01-31 17:02:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:09,545 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2022-01-31 17:02:09,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2022-01-31 17:02:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:02:09,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:09,546 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:09,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:02:09,546 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash -418988777, now seen corresponding path program 58 times [2022-01-31 17:02:09,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:09,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590124810] [2022-01-31 17:02:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:09,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:09,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:09,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:09,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:10,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:10,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590124810] [2022-01-31 17:02:10,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [590124810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:10,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:10,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:02:10,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453239740] [2022-01-31 17:02:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:10,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:02:10,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:02:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:02:10,709 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 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 17:02:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:11,656 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2022-01-31 17:02:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:02:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 17:02:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:11,657 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:02:11,657 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:02:11,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:02:11,659 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:11,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 55 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:02:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-01-31 17:02:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.0728476821192052) internal successors, (162), 151 states have internal predecessors, (162), 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 17:02:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 167 transitions. [2022-01-31 17:02:11,684 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 167 transitions. Word has length 141 [2022-01-31 17:02:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:11,684 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 167 transitions. [2022-01-31 17:02:11,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 60 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 17:02:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 167 transitions. [2022-01-31 17:02:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:02:11,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:11,686 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:11,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:02:11,686 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash -192023243, now seen corresponding path program 59 times [2022-01-31 17:02:11,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:11,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070036361] [2022-01-31 17:02:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:11,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:11,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:11,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:11,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:12,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070036361] [2022-01-31 17:02:12,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2070036361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:12,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:12,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:02:12,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391842863] [2022-01-31 17:02:12,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:12,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:02:12,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:02:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:02:12,870 INFO L87 Difference]: Start difference. First operand 157 states and 167 transitions. Second operand has 62 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 61 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:13,955 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2022-01-31 17:02:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:02:13,955 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 61 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:02:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:13,956 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:02:13,956 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:02:13,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:02:13,957 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 142 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:13,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 50 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:02:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-01-31 17:02:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 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 17:02:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2022-01-31 17:02:13,983 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 143 [2022-01-31 17:02:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:13,983 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2022-01-31 17:02:13,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 61 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2022-01-31 17:02:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:02:13,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:13,984 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:13,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:02:13,984 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1121477165, now seen corresponding path program 60 times [2022-01-31 17:02:13,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:13,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340822812] [2022-01-31 17:02:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:13,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:13,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:13,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:13,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:14,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:14,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340822812] [2022-01-31 17:02:14,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340822812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:14,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:14,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:02:14,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210572895] [2022-01-31 17:02:14,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:14,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:02:14,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:02:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:02:14,855 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 62 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:16,066 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-01-31 17:02:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:02:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 62 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 17:02:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:16,067 INFO L225 Difference]: With dead ends: 196 [2022-01-31 17:02:16,067 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:02:16,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:02:16,069 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:16,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 40 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:02:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-01-31 17:02:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.070967741935484) internal successors, (166), 155 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2022-01-31 17:02:16,094 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 145 [2022-01-31 17:02:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:16,095 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2022-01-31 17:02:16,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 62 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2022-01-31 17:02:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:02:16,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:16,095 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:16,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:02:16,096 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -973498639, now seen corresponding path program 61 times [2022-01-31 17:02:16,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:16,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580403630] [2022-01-31 17:02:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:16,098 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:16,098 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:16,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:16,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:17,355 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 17:02:17,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:17,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580403630] [2022-01-31 17:02:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [580403630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:17,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:02:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437429862] [2022-01-31 17:02:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:02:17,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:02:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:02:17,357 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand has 64 states, 64 states have (on average 2.140625) internal successors, (137), 63 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 17:02:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:18,327 INFO L93 Difference]: Finished difference Result 198 states and 218 transitions. [2022-01-31 17:02:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:02:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.140625) internal successors, (137), 63 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:02:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:18,344 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:02:18,344 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 17:02:18,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:02:18,346 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:18,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 17:02:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-01-31 17:02:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 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 17:02:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2022-01-31 17:02:18,386 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 147 [2022-01-31 17:02:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:18,386 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2022-01-31 17:02:18,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.140625) internal successors, (137), 63 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 17:02:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2022-01-31 17:02:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:02:18,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:18,387 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:18,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:02:18,387 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash -500055921, now seen corresponding path program 62 times [2022-01-31 17:02:18,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:18,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386118934] [2022-01-31 17:02:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:18,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:18,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:18,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:18,391 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:19,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:19,392 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 17:02:19,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:19,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386118934] [2022-01-31 17:02:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [386118934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:19,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:19,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:02:19,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871430603] [2022-01-31 17:02:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:19,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:02:19,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:02:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:02:19,394 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 64 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:20,409 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2022-01-31 17:02:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:02:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 64 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 17:02:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:20,410 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:02:20,410 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 17:02:20,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:02:20,411 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:20,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 55 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 17:02:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-01-31 17:02:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 159 states have (on average 1.069182389937107) internal successors, (170), 159 states have internal predecessors, (170), 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 17:02:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 175 transitions. [2022-01-31 17:02:20,439 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 175 transitions. Word has length 149 [2022-01-31 17:02:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:20,439 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 175 transitions. [2022-01-31 17:02:20,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 64 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 175 transitions. [2022-01-31 17:02:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:02:20,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:20,440 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:20,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:02:20,440 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -788137299, now seen corresponding path program 63 times [2022-01-31 17:02:20,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:20,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758342327] [2022-01-31 17:02:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:20,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:20,442 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:20,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:20,444 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:21,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758342327] [2022-01-31 17:02:21,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758342327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:21,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:21,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:02:21,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643377166] [2022-01-31 17:02:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:21,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:02:21,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:02:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:02:21,834 INFO L87 Difference]: Start difference. First operand 165 states and 175 transitions. Second operand has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:23,458 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2022-01-31 17:02:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:02:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 17:02:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:23,459 INFO L225 Difference]: With dead ends: 202 [2022-01-31 17:02:23,459 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:02:23,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:02:23,461 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:23,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 65 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:02:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-01-31 17:02:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.0683229813664596) internal successors, (172), 161 states have internal predecessors, (172), 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 17:02:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 177 transitions. [2022-01-31 17:02:23,489 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 177 transitions. Word has length 151 [2022-01-31 17:02:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 177 transitions. [2022-01-31 17:02:23,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 65 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 177 transitions. [2022-01-31 17:02:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:02:23,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:23,490 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:23,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:02:23,490 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1538532683, now seen corresponding path program 64 times [2022-01-31 17:02:23,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:23,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465558604] [2022-01-31 17:02:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:23,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:23,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:23,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:23,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:24,857 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465558604] [2022-01-31 17:02:24,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465558604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:24,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:24,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:02:24,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960331706] [2022-01-31 17:02:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:24,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:02:24,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:02:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:02:24,858 INFO L87 Difference]: Start difference. First operand 167 states and 177 transitions. Second operand has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 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 17:02:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:26,609 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2022-01-31 17:02:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:02:26,609 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 17:02:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:26,609 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:02:26,610 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 17:02:26,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:02:26,611 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 152 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:26,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 60 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 17:02:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-01-31 17:02:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.0674846625766872) internal successors, (174), 163 states have internal predecessors, (174), 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 17:02:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2022-01-31 17:02:26,639 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 153 [2022-01-31 17:02:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:26,640 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2022-01-31 17:02:26,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 66 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 17:02:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2022-01-31 17:02:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:02:26,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:26,640 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:26,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:02:26,640 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -209575831, now seen corresponding path program 65 times [2022-01-31 17:02:26,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257975237] [2022-01-31 17:02:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:26,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:26,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:26,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:26,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:27,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:27,939 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 17:02:27,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257975237] [2022-01-31 17:02:27,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [257975237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:27,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:27,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:02:27,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044558328] [2022-01-31 17:02:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:27,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:02:27,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:02:27,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:02:27,940 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 68 states, 68 states have (on average 2.1323529411764706) internal successors, (145), 67 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:29,057 INFO L93 Difference]: Finished difference Result 206 states and 226 transitions. [2022-01-31 17:02:29,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:02:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1323529411764706) internal successors, (145), 67 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:02:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:29,058 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:02:29,058 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 17:02:29,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:02:29,060 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:29,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 45 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 17:02:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-01-31 17:02:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.0666666666666667) internal successors, (176), 165 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2022-01-31 17:02:29,112 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 155 [2022-01-31 17:02:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:29,112 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2022-01-31 17:02:29,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1323529411764706) internal successors, (145), 67 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2022-01-31 17:02:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:02:29,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:29,113 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:29,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:02:29,113 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash -809645049, now seen corresponding path program 66 times [2022-01-31 17:02:29,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:29,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704356045] [2022-01-31 17:02:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:29,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:29,115 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:29,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:29,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:30,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704356045] [2022-01-31 17:02:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704356045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:30,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:30,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:02:30,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657962057] [2022-01-31 17:02:30,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:30,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:02:30,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:30,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:02:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:02:30,015 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 68 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:31,505 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2022-01-31 17:02:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:02:31,506 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 68 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 17:02:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:31,506 INFO L225 Difference]: With dead ends: 208 [2022-01-31 17:02:31,506 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:02:31,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:02:31,508 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:31,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 55 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:02:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-01-31 17:02:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 167 states have internal predecessors, (178), 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 17:02:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 183 transitions. [2022-01-31 17:02:31,574 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 183 transitions. Word has length 157 [2022-01-31 17:02:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:31,574 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 183 transitions. [2022-01-31 17:02:31,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.130434782608696) internal successors, (147), 68 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 183 transitions. [2022-01-31 17:02:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:02:31,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:31,575 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:31,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:02:31,575 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1950545883, now seen corresponding path program 67 times [2022-01-31 17:02:31,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:31,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817892686] [2022-01-31 17:02:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:31,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:31,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:31,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:31,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:32,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:32,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817892686] [2022-01-31 17:02:32,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [817892686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:32,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:32,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:02:32,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637640377] [2022-01-31 17:02:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:02:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:02:32,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:02:32,780 INFO L87 Difference]: Start difference. First operand 173 states and 183 transitions. Second operand has 70 states, 70 states have (on average 2.1285714285714286) internal successors, (149), 69 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 17:02:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:33,998 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2022-01-31 17:02:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:02:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1285714285714286) internal successors, (149), 69 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:02:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:33,999 INFO L225 Difference]: With dead ends: 210 [2022-01-31 17:02:34,000 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 17:02:34,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:02:34,002 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:34,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 60 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 17:02:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-01-31 17:02:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.0650887573964498) internal successors, (180), 169 states have internal predecessors, (180), 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 17:02:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 185 transitions. [2022-01-31 17:02:34,050 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 185 transitions. Word has length 159 [2022-01-31 17:02:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:34,050 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 185 transitions. [2022-01-31 17:02:34,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1285714285714286) internal successors, (149), 69 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 17:02:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 185 transitions. [2022-01-31 17:02:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:02:34,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:34,066 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:34,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:02:34,067 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1155380419, now seen corresponding path program 68 times [2022-01-31 17:02:34,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:34,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366841819] [2022-01-31 17:02:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:34,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:34,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:34,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:34,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:35,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366841819] [2022-01-31 17:02:35,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366841819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:35,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:35,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:02:35,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454367613] [2022-01-31 17:02:35,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:35,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:02:35,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:02:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:02:35,612 INFO L87 Difference]: Start difference. First operand 175 states and 185 transitions. Second operand has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:37,308 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2022-01-31 17:02:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:02:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 17:02:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:37,309 INFO L225 Difference]: With dead ends: 212 [2022-01-31 17:02:37,309 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:02:37,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:02:37,310 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:37,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 55 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:02:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-01-31 17:02:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 171 states have (on average 1.064327485380117) internal successors, (182), 171 states have internal predecessors, (182), 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 17:02:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 187 transitions. [2022-01-31 17:02:37,343 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 187 transitions. Word has length 161 [2022-01-31 17:02:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:37,343 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 187 transitions. [2022-01-31 17:02:37,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 70 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 187 transitions. [2022-01-31 17:02:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:02:37,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:37,344 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:37,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:02:37,344 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash 948285921, now seen corresponding path program 69 times [2022-01-31 17:02:37,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:37,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229439211] [2022-01-31 17:02:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:37,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:37,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:37,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:37,348 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:38,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229439211] [2022-01-31 17:02:38,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229439211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:38,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:02:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336723171] [2022-01-31 17:02:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:02:38,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:02:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:02:38,899 INFO L87 Difference]: Start difference. First operand 177 states and 187 transitions. Second operand has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:40,563 INFO L93 Difference]: Finished difference Result 214 states and 234 transitions. [2022-01-31 17:02:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:02:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:02:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:40,564 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:02:40,564 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 17:02:40,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:02:40,566 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:40,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 60 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 17:02:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-01-31 17:02:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.0635838150289016) internal successors, (184), 173 states have internal predecessors, (184), 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 17:02:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 189 transitions. [2022-01-31 17:02:40,600 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 189 transitions. Word has length 163 [2022-01-31 17:02:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:40,600 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 189 transitions. [2022-01-31 17:02:40,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.125) internal successors, (153), 71 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 189 transitions. [2022-01-31 17:02:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:02:40,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:40,601 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:40,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:02:40,601 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash -501031041, now seen corresponding path program 70 times [2022-01-31 17:02:40,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:40,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200145855] [2022-01-31 17:02:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:40,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:40,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:40,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:40,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:41,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:41,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:41,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200145855] [2022-01-31 17:02:41,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200145855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:41,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:41,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:02:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377321201] [2022-01-31 17:02:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:41,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:02:41,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:02:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:02:41,721 INFO L87 Difference]: Start difference. First operand 179 states and 189 transitions. Second operand has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 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 17:02:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:43,378 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2022-01-31 17:02:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:02:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 17:02:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:43,379 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:02:43,379 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 17:02:43,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:02:43,380 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:43,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 60 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 17:02:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-01-31 17:02:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.062857142857143) internal successors, (186), 175 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2022-01-31 17:02:43,415 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 165 [2022-01-31 17:02:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:43,415 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2022-01-31 17:02:43,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 72 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 17:02:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2022-01-31 17:02:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:02:43,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:43,416 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:43,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:02:43,416 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1725227619, now seen corresponding path program 71 times [2022-01-31 17:02:43,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207167130] [2022-01-31 17:02:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:43,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:43,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:43,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:43,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:44,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:44,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207167130] [2022-01-31 17:02:44,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [207167130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:44,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:44,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:02:44,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233197148] [2022-01-31 17:02:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:44,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:02:44,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:02:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:02:44,891 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:46,783 INFO L93 Difference]: Finished difference Result 218 states and 238 transitions. [2022-01-31 17:02:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:02:46,783 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:02:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:46,784 INFO L225 Difference]: With dead ends: 218 [2022-01-31 17:02:46,784 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:02:46,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:02:46,786 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 166 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:46,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 70 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:02:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-01-31 17:02:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.0621468926553672) internal successors, (188), 177 states have internal predecessors, (188), 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 17:02:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 193 transitions. [2022-01-31 17:02:46,822 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 193 transitions. Word has length 167 [2022-01-31 17:02:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:46,822 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 193 transitions. [2022-01-31 17:02:46,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 73 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 193 transitions. [2022-01-31 17:02:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:02:46,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:46,823 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:46,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:02:46,823 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1357099973, now seen corresponding path program 72 times [2022-01-31 17:02:46,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168840654] [2022-01-31 17:02:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:46,827 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:46,827 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:46,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:46,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:48,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:48,163 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 17:02:48,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168840654] [2022-01-31 17:02:48,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168840654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:48,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:48,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:02:48,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292551302] [2022-01-31 17:02:48,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:48,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:02:48,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:02:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:02:48,165 INFO L87 Difference]: Start difference. First operand 183 states and 193 transitions. Second operand has 75 states, 75 states have (on average 2.12) internal successors, (159), 74 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:50,055 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2022-01-31 17:02:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:02:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.12) internal successors, (159), 74 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 17:02:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:50,056 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:02:50,056 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 17:02:50,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:02:50,057 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 168 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:50,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 75 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:02:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 17:02:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-01-31 17:02:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 179 states have (on average 1.0614525139664805) internal successors, (190), 179 states have internal predecessors, (190), 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 17:02:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2022-01-31 17:02:50,094 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 169 [2022-01-31 17:02:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:50,094 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2022-01-31 17:02:50,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.12) internal successors, (159), 74 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2022-01-31 17:02:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:02:50,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:50,095 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:50,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:02:50,095 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 226249561, now seen corresponding path program 73 times [2022-01-31 17:02:50,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:50,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861894280] [2022-01-31 17:02:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:50,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:50,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:50,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:50,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:51,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861894280] [2022-01-31 17:02:51,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [861894280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:51,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:51,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:02:51,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677097885] [2022-01-31 17:02:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:51,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:02:51,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:02:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:02:51,247 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 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 17:02:52,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:52,687 INFO L93 Difference]: Finished difference Result 222 states and 242 transitions. [2022-01-31 17:02:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:02:52,688 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:02:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:52,688 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:02:52,688 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 17:02:52,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:02:52,691 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:52,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 65 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 17:02:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-01-31 17:02:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 181 states have internal predecessors, (192), 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 17:02:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 197 transitions. [2022-01-31 17:02:52,744 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 197 transitions. Word has length 171 [2022-01-31 17:02:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:52,744 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 197 transitions. [2022-01-31 17:02:52,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 75 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 17:02:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 197 transitions. [2022-01-31 17:02:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:02:52,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:52,745 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:52,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:02:52,746 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1406728951, now seen corresponding path program 74 times [2022-01-31 17:02:52,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348309561] [2022-01-31 17:02:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:52,747 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:52,747 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:52,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:52,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:02:53,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348309561] [2022-01-31 17:02:53,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [348309561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:53,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:53,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:02:53,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991977675] [2022-01-31 17:02:53,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:53,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:02:53,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:02:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:02:53,845 INFO L87 Difference]: Start difference. First operand 187 states and 197 transitions. Second operand has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 76 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:55,443 INFO L93 Difference]: Finished difference Result 224 states and 244 transitions. [2022-01-31 17:02:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:02:55,443 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 76 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 17:02:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:55,444 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:02:55,444 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 17:02:55,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:02:55,446 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 172 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:55,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 65 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 17:02:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-01-31 17:02:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.0601092896174864) internal successors, (194), 183 states have internal predecessors, (194), 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 17:02:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 199 transitions. [2022-01-31 17:02:55,485 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 199 transitions. Word has length 173 [2022-01-31 17:02:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:55,485 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 199 transitions. [2022-01-31 17:02:55,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.116883116883117) internal successors, (163), 76 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 199 transitions. [2022-01-31 17:02:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:02:55,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:55,486 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:55,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:02:55,486 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1976056597, now seen corresponding path program 75 times [2022-01-31 17:02:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:55,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921762818] [2022-01-31 17:02:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:55,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:55,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:55,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:55,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:57,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:02:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:02:57,376 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 17:02:57,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:02:57,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921762818] [2022-01-31 17:02:57,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921762818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:02:57,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:02:57,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:02:57,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548491310] [2022-01-31 17:02:57,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:02:57,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:02:57,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:02:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:02:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:02:57,378 INFO L87 Difference]: Start difference. First operand 189 states and 199 transitions. Second operand has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:02:58,851 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2022-01-31 17:02:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:02:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:02:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:02:58,852 INFO L225 Difference]: With dead ends: 226 [2022-01-31 17:02:58,852 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 17:02:58,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:02:58,853 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 174 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:02:58,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:02:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 17:02:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2022-01-31 17:02:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.0594594594594595) internal successors, (196), 185 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:02:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2022-01-31 17:02:58,891 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 175 [2022-01-31 17:02:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:02:58,892 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2022-01-31 17:02:58,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 77 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:02:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2022-01-31 17:02:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:02:58,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:02:58,892 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:02:58,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:02:58,893 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:02:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:02:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -655889485, now seen corresponding path program 76 times [2022-01-31 17:02:58,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:02:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923559657] [2022-01-31 17:02:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:02:58,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:02:58,894 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:02:58,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:02:58,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:02:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:00,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923559657] [2022-01-31 17:03:00,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923559657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:00,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:00,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:03:00,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10707908] [2022-01-31 17:03:00,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:00,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:03:00,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:03:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:03:00,014 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 79 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 78 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 17:03:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:01,501 INFO L93 Difference]: Finished difference Result 228 states and 248 transitions. [2022-01-31 17:03:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:03:01,502 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 78 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 17:03:01,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:01,502 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:03:01,502 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 17:03:01,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:03:01,503 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 176 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:01,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 45 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:03:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 17:03:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-01-31 17:03:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 187 states have (on average 1.0588235294117647) internal successors, (198), 187 states have internal predecessors, (198), 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 17:03:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2022-01-31 17:03:01,544 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 177 [2022-01-31 17:03:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:01,544 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2022-01-31 17:03:01,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 78 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 17:03:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2022-01-31 17:03:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:03:01,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:01,545 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:01,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:03:01,545 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash -220336943, now seen corresponding path program 77 times [2022-01-31 17:03:01,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949110210] [2022-01-31 17:03:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:01,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:01,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:01,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:01,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:02,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949110210] [2022-01-31 17:03:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949110210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:02,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:02,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:03:02,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244646561] [2022-01-31 17:03:02,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:02,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:03:02,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:03:02,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:03:02,864 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:05,267 INFO L93 Difference]: Finished difference Result 230 states and 250 transitions. [2022-01-31 17:03:05,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:03:05,267 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:03:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:05,268 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:03:05,268 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 17:03:05,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:03:05,270 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:05,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 55 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 17:03:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-01-31 17:03:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.0582010582010581) internal successors, (200), 189 states have internal predecessors, (200), 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 17:03:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 205 transitions. [2022-01-31 17:03:05,311 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 205 transitions. Word has length 179 [2022-01-31 17:03:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:05,311 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 205 transitions. [2022-01-31 17:03:05,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1125) internal successors, (169), 79 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 205 transitions. [2022-01-31 17:03:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:03:05,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:05,312 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:05,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:03:05,312 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1733828207, now seen corresponding path program 78 times [2022-01-31 17:03:05,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:05,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257745205] [2022-01-31 17:03:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:05,314 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:05,314 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:05,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:05,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:07,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:07,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:07,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257745205] [2022-01-31 17:03:07,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257745205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:07,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:07,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:03:07,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696993688] [2022-01-31 17:03:07,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:07,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:03:07,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:03:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:03:07,162 INFO L87 Difference]: Start difference. First operand 195 states and 205 transitions. Second operand has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:09,324 INFO L93 Difference]: Finished difference Result 232 states and 252 transitions. [2022-01-31 17:03:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:03:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 17:03:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:09,325 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:03:09,325 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:03:09,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:03:09,328 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 180 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:09,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 50 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:03:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-01-31 17:03:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 191 states have (on average 1.057591623036649) internal successors, (202), 191 states have internal predecessors, (202), 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 17:03:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 207 transitions. [2022-01-31 17:03:09,399 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 207 transitions. Word has length 181 [2022-01-31 17:03:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:09,399 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 207 transitions. [2022-01-31 17:03:09,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.111111111111111) internal successors, (171), 80 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 207 transitions. [2022-01-31 17:03:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:03:09,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:09,400 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:09,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:03:09,400 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1509138291, now seen corresponding path program 79 times [2022-01-31 17:03:09,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:09,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638882050] [2022-01-31 17:03:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:09,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:09,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:09,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:09,406 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:11,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:11,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638882050] [2022-01-31 17:03:11,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1638882050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:11,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:11,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:03:11,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912530683] [2022-01-31 17:03:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:11,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:03:11,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:03:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:03:11,471 INFO L87 Difference]: Start difference. First operand 197 states and 207 transitions. Second operand has 82 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 81 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 17:03:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:13,998 INFO L93 Difference]: Finished difference Result 234 states and 254 transitions. [2022-01-31 17:03:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:03:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 81 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:03:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:13,999 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:03:13,999 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 17:03:14,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:03:14,001 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:14,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 50 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 17:03:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-01-31 17:03:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.0569948186528497) internal successors, (204), 193 states have internal predecessors, (204), 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 17:03:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2022-01-31 17:03:14,044 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 183 [2022-01-31 17:03:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:14,044 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2022-01-31 17:03:14,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 81 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 17:03:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2022-01-31 17:03:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:03:14,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:14,060 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:14,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:03:14,061 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash 146314027, now seen corresponding path program 80 times [2022-01-31 17:03:14,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:14,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576732863] [2022-01-31 17:03:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:14,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:14,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:14,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:14,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:15,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:15,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576732863] [2022-01-31 17:03:15,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576732863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:15,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:15,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:03:15,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637976068] [2022-01-31 17:03:15,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:15,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:03:15,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:15,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:03:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:03:15,878 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:17,856 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-01-31 17:03:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:03:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 17:03:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:17,857 INFO L225 Difference]: With dead ends: 236 [2022-01-31 17:03:17,857 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 17:03:17,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:03:17,859 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 184 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:17,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 85 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 17:03:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-01-31 17:03:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 195 states have (on average 1.0564102564102564) internal successors, (206), 195 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2022-01-31 17:03:17,903 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 185 [2022-01-31 17:03:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2022-01-31 17:03:17,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.108433734939759) internal successors, (175), 82 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2022-01-31 17:03:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:03:17,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:17,905 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:03:17,905 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1898092105, now seen corresponding path program 81 times [2022-01-31 17:03:17,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:17,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999009516] [2022-01-31 17:03:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:17,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:17,907 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:17,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:17,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:19,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999009516] [2022-01-31 17:03:19,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999009516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:19,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:19,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:03:19,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182628285] [2022-01-31 17:03:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:19,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:03:19,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:03:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:03:19,213 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:20,886 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2022-01-31 17:03:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:03:20,887 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:03:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:20,887 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:03:20,887 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 17:03:20,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:03:20,889 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:20,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 70 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:03:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 17:03:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-01-31 17:03:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 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 17:03:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 213 transitions. [2022-01-31 17:03:20,940 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 213 transitions. Word has length 187 [2022-01-31 17:03:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:20,941 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 213 transitions. [2022-01-31 17:03:20,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 213 transitions. [2022-01-31 17:03:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:03:20,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:20,942 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:20,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:03:20,942 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1729645031, now seen corresponding path program 82 times [2022-01-31 17:03:20,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:20,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472310808] [2022-01-31 17:03:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:20,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:20,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:20,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:20,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:23,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:23,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:23,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472310808] [2022-01-31 17:03:23,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472310808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:23,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:23,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:03:23,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590501081] [2022-01-31 17:03:23,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:23,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:03:23,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:03:23,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:03:23,194 INFO L87 Difference]: Start difference. First operand 203 states and 213 transitions. Second operand has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 84 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 17:03:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:25,167 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2022-01-31 17:03:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:03:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 84 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 17:03:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:25,168 INFO L225 Difference]: With dead ends: 240 [2022-01-31 17:03:25,169 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 17:03:25,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:03:25,170 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 188 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:25,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 60 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 17:03:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-31 17:03:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.0552763819095476) internal successors, (210), 199 states have internal predecessors, (210), 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 17:03:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2022-01-31 17:03:25,219 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 189 [2022-01-31 17:03:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:25,219 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2022-01-31 17:03:25,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 84 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 17:03:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2022-01-31 17:03:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:03:25,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:25,220 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:25,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:03:25,220 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1234203131, now seen corresponding path program 83 times [2022-01-31 17:03:25,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:25,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149202557] [2022-01-31 17:03:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:25,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:25,222 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:25,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:25,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:26,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149202557] [2022-01-31 17:03:26,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149202557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:26,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:26,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:03:26,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060064464] [2022-01-31 17:03:26,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:26,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:03:26,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:03:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:03:26,782 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:28,491 INFO L93 Difference]: Finished difference Result 242 states and 262 transitions. [2022-01-31 17:03:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:03:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:03:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:28,492 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:03:28,492 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:03:28,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:03:28,493 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:28,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 45 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:03:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:03:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-01-31 17:03:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.054726368159204) internal successors, (212), 201 states have internal predecessors, (212), 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 17:03:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 217 transitions. [2022-01-31 17:03:28,541 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 217 transitions. Word has length 191 [2022-01-31 17:03:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:28,542 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 217 transitions. [2022-01-31 17:03:28,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.104651162790698) internal successors, (181), 85 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 217 transitions. [2022-01-31 17:03:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:03:28,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:28,543 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:28,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:03:28,543 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1928969565, now seen corresponding path program 84 times [2022-01-31 17:03:28,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153071465] [2022-01-31 17:03:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:28,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:28,545 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:28,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:28,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:30,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153071465] [2022-01-31 17:03:30,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153071465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:30,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:30,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:03:30,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81154248] [2022-01-31 17:03:30,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:30,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:03:30,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:03:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:03:30,501 INFO L87 Difference]: Start difference. First operand 207 states and 217 transitions. Second operand has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 86 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:32,279 INFO L93 Difference]: Finished difference Result 244 states and 264 transitions. [2022-01-31 17:03:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:03:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 86 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 17:03:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:32,280 INFO L225 Difference]: With dead ends: 244 [2022-01-31 17:03:32,280 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 17:03:32,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:03:32,282 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 192 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:32,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 45 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:03:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 17:03:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-01-31 17:03:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 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 17:03:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 219 transitions. [2022-01-31 17:03:32,330 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 219 transitions. Word has length 193 [2022-01-31 17:03:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:32,330 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 219 transitions. [2022-01-31 17:03:32,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.103448275862069) internal successors, (183), 86 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 219 transitions. [2022-01-31 17:03:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:03:32,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:32,331 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:32,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:03:32,331 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash 415385537, now seen corresponding path program 85 times [2022-01-31 17:03:32,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272741025] [2022-01-31 17:03:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:32,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:32,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:32,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:32,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:34,231 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272741025] [2022-01-31 17:03:34,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [272741025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:34,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:34,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:03:34,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970031723] [2022-01-31 17:03:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:34,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:03:34,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:03:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:03:34,233 INFO L87 Difference]: Start difference. First operand 209 states and 219 transitions. Second operand has 88 states, 88 states have (on average 2.102272727272727) internal successors, (185), 87 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 17:03:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:37,208 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2022-01-31 17:03:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:03:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.102272727272727) internal successors, (185), 87 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:03:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:37,209 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:03:37,209 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 17:03:37,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:03:37,210 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 194 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:37,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 80 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 17:03:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 17:03:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.053658536585366) internal successors, (216), 205 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 221 transitions. [2022-01-31 17:03:37,260 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 221 transitions. Word has length 195 [2022-01-31 17:03:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:37,260 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 221 transitions. [2022-01-31 17:03:37,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.102272727272727) internal successors, (185), 87 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 17:03:37,261 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 221 transitions. [2022-01-31 17:03:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:03:37,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:37,261 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:37,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:03:37,261 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1517191841, now seen corresponding path program 86 times [2022-01-31 17:03:37,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054759794] [2022-01-31 17:03:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:37,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:37,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:37,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:37,267 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:39,059 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:39,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054759794] [2022-01-31 17:03:39,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054759794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:39,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:39,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:03:39,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042399127] [2022-01-31 17:03:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:39,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:03:39,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:03:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:03:39,061 INFO L87 Difference]: Start difference. First operand 211 states and 221 transitions. Second operand has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:41,579 INFO L93 Difference]: Finished difference Result 248 states and 268 transitions. [2022-01-31 17:03:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:03:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 17:03:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:41,580 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:03:41,580 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 17:03:41,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:03:41,582 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 196 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:41,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 55 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 17:03:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-01-31 17:03:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 207 states have (on average 1.0531400966183575) internal successors, (218), 207 states have internal predecessors, (218), 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 17:03:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 223 transitions. [2022-01-31 17:03:41,633 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 223 transitions. Word has length 197 [2022-01-31 17:03:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:41,633 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 223 transitions. [2022-01-31 17:03:41,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 88 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 223 transitions. [2022-01-31 17:03:41,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:03:41,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:41,634 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:41,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:03:41,634 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 996787069, now seen corresponding path program 87 times [2022-01-31 17:03:41,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694099077] [2022-01-31 17:03:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:41,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:41,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:41,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:41,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:43,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:43,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694099077] [2022-01-31 17:03:43,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694099077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:43,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:43,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:03:43,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724852203] [2022-01-31 17:03:43,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:43,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:03:43,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:43,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:03:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:03:43,103 INFO L87 Difference]: Start difference. First operand 213 states and 223 transitions. Second operand has 90 states, 90 states have (on average 2.1) internal successors, (189), 89 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:45,024 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2022-01-31 17:03:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:03:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 89 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:03:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:45,025 INFO L225 Difference]: With dead ends: 250 [2022-01-31 17:03:45,025 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:03:45,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:03:45,027 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 198 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:45,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 60 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:03:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-01-31 17:03:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 209 states have (on average 1.0526315789473684) internal successors, (220), 209 states have internal predecessors, (220), 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 17:03:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 225 transitions. [2022-01-31 17:03:45,103 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 225 transitions. Word has length 199 [2022-01-31 17:03:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:45,103 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 225 transitions. [2022-01-31 17:03:45,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1) internal successors, (189), 89 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 225 transitions. [2022-01-31 17:03:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:03:45,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:45,104 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:45,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:03:45,104 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:45,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1136068069, now seen corresponding path program 88 times [2022-01-31 17:03:45,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521938680] [2022-01-31 17:03:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:45,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:45,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:45,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:45,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:46,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:46,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521938680] [2022-01-31 17:03:46,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [521938680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:46,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:46,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:03:46,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657289618] [2022-01-31 17:03:46,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:46,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:03:46,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:46,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:03:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:03:46,574 INFO L87 Difference]: Start difference. First operand 215 states and 225 transitions. Second operand has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 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 17:03:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:48,910 INFO L93 Difference]: Finished difference Result 252 states and 272 transitions. [2022-01-31 17:03:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:03:48,911 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 17:03:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:48,912 INFO L225 Difference]: With dead ends: 252 [2022-01-31 17:03:48,912 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 17:03:48,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:03:48,915 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:48,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 70 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 17:03:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-01-31 17:03:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 211 states have (on average 1.052132701421801) internal successors, (222), 211 states have internal predecessors, (222), 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 17:03:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 227 transitions. [2022-01-31 17:03:48,992 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 227 transitions. Word has length 201 [2022-01-31 17:03:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:48,992 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 227 transitions. [2022-01-31 17:03:48,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.098901098901099) internal successors, (191), 90 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 17:03:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 227 transitions. [2022-01-31 17:03:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:03:48,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:48,993 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:03:48,993 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2110455495, now seen corresponding path program 89 times [2022-01-31 17:03:48,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:48,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361186740] [2022-01-31 17:03:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:48,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:48,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:48,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:48,999 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:51,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:51,583 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361186740] [2022-01-31 17:03:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361186740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:51,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:03:51,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876555371] [2022-01-31 17:03:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:51,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:03:51,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:03:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:03:51,585 INFO L87 Difference]: Start difference. First operand 217 states and 227 transitions. Second operand has 92 states, 92 states have (on average 2.097826086956522) internal successors, (193), 91 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:54,040 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2022-01-31 17:03:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:03:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.097826086956522) internal successors, (193), 91 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:03:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:54,041 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:03:54,041 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 17:03:54,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:03:54,044 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:54,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 75 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 17:03:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-01-31 17:03:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.051643192488263) internal successors, (224), 213 states have internal predecessors, (224), 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 17:03:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 229 transitions. [2022-01-31 17:03:54,114 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 229 transitions. Word has length 203 [2022-01-31 17:03:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 229 transitions. [2022-01-31 17:03:54,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.097826086956522) internal successors, (193), 91 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 229 transitions. [2022-01-31 17:03:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:03:54,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:54,115 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:54,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:03:54,115 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2101065943, now seen corresponding path program 90 times [2022-01-31 17:03:54,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:54,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981458640] [2022-01-31 17:03:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:54,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:54,117 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:54,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:54,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:56,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:03:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:03:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:03:56,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:03:56,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981458640] [2022-01-31 17:03:56,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981458640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:03:56,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:03:56,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:03:56,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293715631] [2022-01-31 17:03:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:03:56,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:03:56,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:03:56,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:03:56,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:03:56,670 INFO L87 Difference]: Start difference. First operand 219 states and 229 transitions. Second operand has 93 states, 93 states have (on average 2.096774193548387) internal successors, (195), 92 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:03:58,725 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2022-01-31 17:03:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:03:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.096774193548387) internal successors, (195), 92 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 17:03:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:03:58,726 INFO L225 Difference]: With dead ends: 256 [2022-01-31 17:03:58,726 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 17:03:58,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:03:58,728 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 204 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:03:58,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 65 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:03:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 17:03:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-01-31 17:03:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.0511627906976744) internal successors, (226), 215 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:03:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 231 transitions. [2022-01-31 17:03:58,784 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 231 transitions. Word has length 205 [2022-01-31 17:03:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:03:58,785 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 231 transitions. [2022-01-31 17:03:58,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.096774193548387) internal successors, (195), 92 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:03:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 231 transitions. [2022-01-31 17:03:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:03:58,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:03:58,785 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:03:58,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:03:58,786 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:03:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:03:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -780992267, now seen corresponding path program 91 times [2022-01-31 17:03:58,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:03:58,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592812361] [2022-01-31 17:03:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:03:58,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:03:58,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:03:58,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:03:58,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:03:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:00,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:00,432 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:00,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592812361] [2022-01-31 17:04:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592812361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:00,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:04:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301855458] [2022-01-31 17:04:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:04:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:04:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:04:00,435 INFO L87 Difference]: Start difference. First operand 221 states and 231 transitions. Second operand has 94 states, 94 states have (on average 2.095744680851064) internal successors, (197), 93 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 17:04:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:02,553 INFO L93 Difference]: Finished difference Result 258 states and 278 transitions. [2022-01-31 17:04:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:04:02,553 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.095744680851064) internal successors, (197), 93 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:04:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:02,554 INFO L225 Difference]: With dead ends: 258 [2022-01-31 17:04:02,554 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 17:04:02,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:04:02,557 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:02,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 65 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:04:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 17:04:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-01-31 17:04:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.0506912442396312) internal successors, (228), 217 states have internal predecessors, (228), 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 17:04:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 233 transitions. [2022-01-31 17:04:02,616 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 233 transitions. Word has length 207 [2022-01-31 17:04:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:02,616 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 233 transitions. [2022-01-31 17:04:02,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.095744680851064) internal successors, (197), 93 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 17:04:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 233 transitions. [2022-01-31 17:04:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:04:02,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:02,617 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:04:02,618 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash -185026157, now seen corresponding path program 92 times [2022-01-31 17:04:02,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536774083] [2022-01-31 17:04:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:02,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:02,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:02,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:02,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:04,283 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 17:04:04,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536774083] [2022-01-31 17:04:04,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1536774083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:04,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:04,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:04:04,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547039212] [2022-01-31 17:04:04,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:04,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:04:04,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:04:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:04:04,286 INFO L87 Difference]: Start difference. First operand 223 states and 233 transitions. Second operand has 95 states, 95 states have (on average 2.094736842105263) internal successors, (199), 94 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:06,386 INFO L93 Difference]: Finished difference Result 260 states and 280 transitions. [2022-01-31 17:04:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:04:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.094736842105263) internal successors, (199), 94 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 17:04:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:06,387 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:04:06,387 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 17:04:06,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:04:06,390 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 208 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:06,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 55 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:04:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 17:04:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-01-31 17:04:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 219 states have (on average 1.0502283105022832) internal successors, (230), 219 states have internal predecessors, (230), 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 17:04:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 235 transitions. [2022-01-31 17:04:06,544 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 235 transitions. Word has length 209 [2022-01-31 17:04:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:06,544 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 235 transitions. [2022-01-31 17:04:06,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.094736842105263) internal successors, (199), 94 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 235 transitions. [2022-01-31 17:04:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:04:06,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:06,545 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:06,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:04:06,545 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1307755185, now seen corresponding path program 93 times [2022-01-31 17:04:06,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:06,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548500604] [2022-01-31 17:04:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:06,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:06,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:06,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:06,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:08,387 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548500604] [2022-01-31 17:04:08,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548500604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:08,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:08,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:04:08,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405826333] [2022-01-31 17:04:08,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:08,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:04:08,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:04:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:04:08,390 INFO L87 Difference]: Start difference. First operand 225 states and 235 transitions. Second operand has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:10,536 INFO L93 Difference]: Finished difference Result 262 states and 282 transitions. [2022-01-31 17:04:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:04:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:04:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:10,537 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:04:10,537 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 17:04:10,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:04:10,542 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 210 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:10,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 55 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:04:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 17:04:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-01-31 17:04:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.0497737556561086) internal successors, (232), 221 states have internal predecessors, (232), 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 17:04:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 237 transitions. [2022-01-31 17:04:10,627 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 237 transitions. Word has length 211 [2022-01-31 17:04:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:10,627 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 237 transitions. [2022-01-31 17:04:10,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.09375) internal successors, (201), 95 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 237 transitions. [2022-01-31 17:04:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:04:10,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:10,628 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:10,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:04:10,628 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1351547983, now seen corresponding path program 94 times [2022-01-31 17:04:10,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:10,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667614214] [2022-01-31 17:04:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:10,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:10,630 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:10,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:10,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:12,320 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 17:04:12,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:12,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667614214] [2022-01-31 17:04:12,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [667614214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:12,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:12,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:04:12,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4286390] [2022-01-31 17:04:12,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:12,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:04:12,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:04:12,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:04:12,323 INFO L87 Difference]: Start difference. First operand 227 states and 237 transitions. Second operand has 97 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 96 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 17:04:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:15,648 INFO L93 Difference]: Finished difference Result 264 states and 284 transitions. [2022-01-31 17:04:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:04:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 96 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 17:04:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:15,649 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:04:15,649 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 17:04:15,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:04:15,652 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:15,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 75 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 17:04:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-01-31 17:04:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.0493273542600896) internal successors, (234), 223 states have internal predecessors, (234), 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 17:04:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 239 transitions. [2022-01-31 17:04:15,736 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 239 transitions. Word has length 213 [2022-01-31 17:04:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:15,736 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 239 transitions. [2022-01-31 17:04:15,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 96 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 17:04:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 239 transitions. [2022-01-31 17:04:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:04:15,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:15,737 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:15,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:04:15,737 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 486753901, now seen corresponding path program 95 times [2022-01-31 17:04:15,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:15,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065123684] [2022-01-31 17:04:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:15,739 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:15,739 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:15,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:15,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:17,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:17,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065123684] [2022-01-31 17:04:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065123684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:17,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:04:17,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144664543] [2022-01-31 17:04:17,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:17,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:04:17,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:04:17,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:04:17,729 INFO L87 Difference]: Start difference. First operand 229 states and 239 transitions. Second operand has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:19,975 INFO L93 Difference]: Finished difference Result 266 states and 286 transitions. [2022-01-31 17:04:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:04:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:04:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:19,980 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:04:19,980 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 17:04:19,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:04:19,982 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 214 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:19,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 40 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:04:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 17:04:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-01-31 17:04:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.048888888888889) internal successors, (236), 225 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 241 transitions. [2022-01-31 17:04:20,049 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 241 transitions. Word has length 215 [2022-01-31 17:04:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:20,050 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 241 transitions. [2022-01-31 17:04:20,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 241 transitions. [2022-01-31 17:04:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:04:20,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:20,051 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:20,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:04:20,051 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1651670773, now seen corresponding path program 96 times [2022-01-31 17:04:20,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868415726] [2022-01-31 17:04:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:20,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:20,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:20,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:20,057 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:22,101 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868415726] [2022-01-31 17:04:22,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1868415726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:22,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:22,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:04:22,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629770436] [2022-01-31 17:04:22,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:22,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:04:22,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:04:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:04:22,103 INFO L87 Difference]: Start difference. First operand 231 states and 241 transitions. Second operand has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:24,634 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2022-01-31 17:04:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:04:24,634 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 17:04:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:24,635 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:04:24,635 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 17:04:24,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:04:24,637 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:24,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 50 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 17:04:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-01-31 17:04:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 227 states have (on average 1.0484581497797356) internal successors, (238), 227 states have internal predecessors, (238), 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 17:04:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 243 transitions. [2022-01-31 17:04:24,699 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 243 transitions. Word has length 217 [2022-01-31 17:04:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:24,699 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 243 transitions. [2022-01-31 17:04:24,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.090909090909091) internal successors, (207), 98 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 243 transitions. [2022-01-31 17:04:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:04:24,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:24,700 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:24,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:04:24,700 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 611552297, now seen corresponding path program 97 times [2022-01-31 17:04:24,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:24,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753233474] [2022-01-31 17:04:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:24,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:24,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:24,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:24,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:27,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:27,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:27,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753233474] [2022-01-31 17:04:27,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [753233474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:27,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:27,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:04:27,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614130892] [2022-01-31 17:04:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:27,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:04:27,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:04:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:04:27,045 INFO L87 Difference]: Start difference. First operand 233 states and 243 transitions. Second operand has 100 states, 100 states have (on average 2.09) internal successors, (209), 99 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 17:04:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:30,108 INFO L93 Difference]: Finished difference Result 270 states and 290 transitions. [2022-01-31 17:04:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:04:30,108 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.09) internal successors, (209), 99 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:04:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:30,109 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:04:30,109 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 17:04:30,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:04:30,111 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:30,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 60 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 17:04:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-01-31 17:04:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.0480349344978166) internal successors, (240), 229 states have internal predecessors, (240), 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 17:04:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 245 transitions. [2022-01-31 17:04:30,177 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 245 transitions. Word has length 219 [2022-01-31 17:04:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:30,177 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 245 transitions. [2022-01-31 17:04:30,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.09) internal successors, (209), 99 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 17:04:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 245 transitions. [2022-01-31 17:04:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:04:30,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:30,178 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:30,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:04:30,178 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1979496505, now seen corresponding path program 98 times [2022-01-31 17:04:30,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:30,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079862029] [2022-01-31 17:04:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:30,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:30,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:30,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:30,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:32,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:32,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079862029] [2022-01-31 17:04:32,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079862029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:32,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:32,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:04:32,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253228932] [2022-01-31 17:04:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:32,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:04:32,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:32,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:04:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:04:32,335 INFO L87 Difference]: Start difference. First operand 235 states and 245 transitions. Second operand has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:35,381 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2022-01-31 17:04:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:04:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 17:04:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:35,382 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:04:35,382 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 17:04:35,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:04:35,387 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 220 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:35,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 55 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 17:04:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-01-31 17:04:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 231 states have (on average 1.0476190476190477) internal successors, (242), 231 states have internal predecessors, (242), 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 17:04:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 247 transitions. [2022-01-31 17:04:35,452 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 247 transitions. Word has length 221 [2022-01-31 17:04:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:35,452 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 247 transitions. [2022-01-31 17:04:35,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.089108910891089) internal successors, (211), 100 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 247 transitions. [2022-01-31 17:04:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:04:35,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:35,453 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:35,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:04:35,454 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash -896363547, now seen corresponding path program 99 times [2022-01-31 17:04:35,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:35,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814879005] [2022-01-31 17:04:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:35,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:35,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:35,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:35,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:37,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:37,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814879005] [2022-01-31 17:04:37,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [814879005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:37,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:37,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:04:37,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822547864] [2022-01-31 17:04:37,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:37,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:04:37,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:04:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:04:37,337 INFO L87 Difference]: Start difference. First operand 237 states and 247 transitions. Second operand has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 101 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:39,730 INFO L93 Difference]: Finished difference Result 274 states and 294 transitions. [2022-01-31 17:04:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:04:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 101 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:04:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:39,743 INFO L225 Difference]: With dead ends: 274 [2022-01-31 17:04:39,743 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:04:39,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:04:39,746 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:39,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 50 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:04:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:04:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-31 17:04:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.0472103004291846) internal successors, (244), 233 states have internal predecessors, (244), 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 17:04:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 249 transitions. [2022-01-31 17:04:39,811 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 249 transitions. Word has length 223 [2022-01-31 17:04:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:39,812 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 249 transitions. [2022-01-31 17:04:39,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 101 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 249 transitions. [2022-01-31 17:04:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:04:39,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:39,812 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:39,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:04:39,813 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash 612323459, now seen corresponding path program 100 times [2022-01-31 17:04:39,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:39,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758071801] [2022-01-31 17:04:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:39,814 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:39,814 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:39,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:39,819 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:42,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:42,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:42,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758071801] [2022-01-31 17:04:42,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758071801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:42,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:42,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:04:42,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178565854] [2022-01-31 17:04:42,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:42,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:04:42,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:42,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:04:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:04:42,306 INFO L87 Difference]: Start difference. First operand 239 states and 249 transitions. Second operand has 103 states, 103 states have (on average 2.087378640776699) internal successors, (215), 102 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 17:04:44,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:44,737 INFO L93 Difference]: Finished difference Result 276 states and 296 transitions. [2022-01-31 17:04:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:04:44,737 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.087378640776699) internal successors, (215), 102 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 225 [2022-01-31 17:04:44,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:44,737 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:04:44,738 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 17:04:44,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:04:44,740 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 224 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:44,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 60 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 17:04:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-01-31 17:04:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.0468085106382978) internal successors, (246), 235 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:04:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 251 transitions. [2022-01-31 17:04:44,818 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 251 transitions. Word has length 225 [2022-01-31 17:04:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:44,818 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 251 transitions. [2022-01-31 17:04:44,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.087378640776699) internal successors, (215), 102 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 17:04:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 251 transitions. [2022-01-31 17:04:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:04:44,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:44,819 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:44,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:04:44,819 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1238409823, now seen corresponding path program 101 times [2022-01-31 17:04:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338066473] [2022-01-31 17:04:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:44,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:44,821 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:44,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:44,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:46,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:46,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338066473] [2022-01-31 17:04:46,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [338066473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:46,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:46,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:04:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888613045] [2022-01-31 17:04:46,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:46,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:04:46,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:04:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:04:46,800 INFO L87 Difference]: Start difference. First operand 241 states and 251 transitions. Second operand has 104 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 103 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:49,258 INFO L93 Difference]: Finished difference Result 278 states and 298 transitions. [2022-01-31 17:04:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:04:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 103 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:04:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:49,259 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:04:49,259 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 17:04:49,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:04:49,261 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:49,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 50 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:04:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 17:04:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-01-31 17:04:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.0464135021097047) internal successors, (248), 237 states have internal predecessors, (248), 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 17:04:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 253 transitions. [2022-01-31 17:04:49,330 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 253 transitions. Word has length 227 [2022-01-31 17:04:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:49,331 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 253 transitions. [2022-01-31 17:04:49,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 103 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 253 transitions. [2022-01-31 17:04:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:04:49,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:49,333 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:49,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:04:49,333 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1676633281, now seen corresponding path program 102 times [2022-01-31 17:04:49,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474943848] [2022-01-31 17:04:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:49,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:49,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:49,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:49,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:04:52,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:52,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474943848] [2022-01-31 17:04:52,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474943848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:52,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:52,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:04:52,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188085697] [2022-01-31 17:04:52,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:52,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:04:52,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:04:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:04:52,673 INFO L87 Difference]: Start difference. First operand 243 states and 253 transitions. Second operand has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:04:56,056 INFO L93 Difference]: Finished difference Result 280 states and 300 transitions. [2022-01-31 17:04:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:04:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-01-31 17:04:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:04:56,057 INFO L225 Difference]: With dead ends: 280 [2022-01-31 17:04:56,057 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 17:04:56,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:04:56,060 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 228 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:04:56,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 50 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:04:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 17:04:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-01-31 17:04:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.0460251046025104) internal successors, (250), 239 states have internal predecessors, (250), 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 17:04:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2022-01-31 17:04:56,132 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 229 [2022-01-31 17:04:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:04:56,132 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2022-01-31 17:04:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.085714285714286) internal successors, (219), 104 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:04:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2022-01-31 17:04:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:04:56,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:04:56,133 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:04:56,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:04:56,133 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:04:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:04:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1902581411, now seen corresponding path program 103 times [2022-01-31 17:04:56,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:04:56,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253892395] [2022-01-31 17:04:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:04:56,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:04:56,135 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:04:56,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:04:56,140 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:04:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:04:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:04:59,318 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 17:04:59,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:04:59,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253892395] [2022-01-31 17:04:59,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [253892395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:04:59,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:04:59,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:04:59,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554384849] [2022-01-31 17:04:59,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:04:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:04:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:04:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:04:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:04:59,321 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 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 17:05:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:02,527 INFO L93 Difference]: Finished difference Result 282 states and 302 transitions. [2022-01-31 17:05:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:05:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 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 231 [2022-01-31 17:05:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:02,528 INFO L225 Difference]: With dead ends: 282 [2022-01-31 17:05:02,528 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 17:05:02,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:05:02,531 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:02,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 55 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 17:05:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-01-31 17:05:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.045643153526971) internal successors, (252), 241 states have internal predecessors, (252), 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 17:05:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 257 transitions. [2022-01-31 17:05:02,602 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 257 transitions. Word has length 231 [2022-01-31 17:05:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:02,602 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 257 transitions. [2022-01-31 17:05:02,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 105 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 17:05:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 257 transitions. [2022-01-31 17:05:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:05:02,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:02,603 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:02,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:05:02,603 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash 4597755, now seen corresponding path program 104 times [2022-01-31 17:05:02,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:02,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843474005] [2022-01-31 17:05:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:02,611 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:02,611 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:02,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:02,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:04,989 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 17:05:04,989 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:04,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843474005] [2022-01-31 17:05:04,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [843474005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:04,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:04,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:05:04,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363382065] [2022-01-31 17:05:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:04,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:05:04,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:05:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:05:04,992 INFO L87 Difference]: Start difference. First operand 247 states and 257 transitions. Second operand has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 106 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:08,459 INFO L93 Difference]: Finished difference Result 284 states and 304 transitions. [2022-01-31 17:05:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:05:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 106 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 17:05:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:08,460 INFO L225 Difference]: With dead ends: 284 [2022-01-31 17:05:08,460 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 17:05:08,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:05:08,463 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 232 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:08,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 55 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 17:05:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-01-31 17:05:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 243 states have (on average 1.045267489711934) internal successors, (254), 243 states have internal predecessors, (254), 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 17:05:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 259 transitions. [2022-01-31 17:05:08,557 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 259 transitions. Word has length 233 [2022-01-31 17:05:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:08,558 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 259 transitions. [2022-01-31 17:05:08,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 106 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 259 transitions. [2022-01-31 17:05:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:05:08,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:08,559 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:08,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:05:08,559 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1147259111, now seen corresponding path program 105 times [2022-01-31 17:05:08,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:08,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374738689] [2022-01-31 17:05:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:08,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:08,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:08,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:08,566 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:10,975 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 17:05:10,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:10,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374738689] [2022-01-31 17:05:10,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374738689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:10,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:10,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:05:10,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045186686] [2022-01-31 17:05:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:10,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:05:10,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:05:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:05:10,980 INFO L87 Difference]: Start difference. First operand 249 states and 259 transitions. Second operand has 108 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 107 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:13,750 INFO L93 Difference]: Finished difference Result 286 states and 306 transitions. [2022-01-31 17:05:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:05:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 107 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:05:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:13,751 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:05:13,751 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 17:05:13,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:05:13,753 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 234 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:13,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 45 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:05:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 17:05:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2022-01-31 17:05:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 245 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 261 transitions. [2022-01-31 17:05:13,834 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 261 transitions. Word has length 235 [2022-01-31 17:05:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:13,834 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 261 transitions. [2022-01-31 17:05:13,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 107 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 261 transitions. [2022-01-31 17:05:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:05:13,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:13,835 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:13,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:05:13,835 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 19855031, now seen corresponding path program 106 times [2022-01-31 17:05:13,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:13,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093431648] [2022-01-31 17:05:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:13,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:13,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:13,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:13,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:16,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:16,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093431648] [2022-01-31 17:05:16,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093431648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:16,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:16,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:05:16,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068395032] [2022-01-31 17:05:16,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:16,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:05:16,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:16,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:05:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:05:16,201 INFO L87 Difference]: Start difference. First operand 251 states and 261 transitions. Second operand has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 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 17:05:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:18,935 INFO L93 Difference]: Finished difference Result 288 states and 308 transitions. [2022-01-31 17:05:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:05:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 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 237 [2022-01-31 17:05:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:18,936 INFO L225 Difference]: With dead ends: 288 [2022-01-31 17:05:18,936 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 17:05:18,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:05:18,938 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 236 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:18,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 80 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 17:05:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-01-31 17:05:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 247 states have (on average 1.0445344129554657) internal successors, (258), 247 states have internal predecessors, (258), 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 17:05:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 263 transitions. [2022-01-31 17:05:19,011 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 263 transitions. Word has length 237 [2022-01-31 17:05:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:19,012 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 263 transitions. [2022-01-31 17:05:19,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 108 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 17:05:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 263 transitions. [2022-01-31 17:05:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:05:19,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:19,012 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:19,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:05:19,013 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash 630081237, now seen corresponding path program 107 times [2022-01-31 17:05:19,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:19,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257775475] [2022-01-31 17:05:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:19,014 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:19,014 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:19,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:19,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:21,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:21,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:21,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257775475] [2022-01-31 17:05:21,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [257775475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:21,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:21,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:05:21,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366707293] [2022-01-31 17:05:21,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:21,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:05:21,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:05:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:05:21,809 INFO L87 Difference]: Start difference. First operand 253 states and 263 transitions. Second operand has 110 states, 110 states have (on average 2.081818181818182) internal successors, (229), 109 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:24,838 INFO L93 Difference]: Finished difference Result 290 states and 310 transitions. [2022-01-31 17:05:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:05:24,838 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.081818181818182) internal successors, (229), 109 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:05:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:24,839 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:05:24,839 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 17:05:24,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:05:24,841 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 238 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:24,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 65 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 17:05:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-01-31 17:05:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.0441767068273093) internal successors, (260), 249 states have internal predecessors, (260), 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 17:05:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 265 transitions. [2022-01-31 17:05:24,917 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 265 transitions. Word has length 239 [2022-01-31 17:05:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:24,917 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 265 transitions. [2022-01-31 17:05:24,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.081818181818182) internal successors, (229), 109 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 265 transitions. [2022-01-31 17:05:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:05:24,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:24,918 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:24,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:05:24,918 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1353054349, now seen corresponding path program 108 times [2022-01-31 17:05:24,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:24,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089715610] [2022-01-31 17:05:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:24,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:24,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:24,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:24,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:27,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:27,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:27,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089715610] [2022-01-31 17:05:27,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089715610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:27,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:27,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:05:27,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443401678] [2022-01-31 17:05:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:27,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:05:27,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:05:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:05:27,147 INFO L87 Difference]: Start difference. First operand 255 states and 265 transitions. Second operand has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:30,237 INFO L93 Difference]: Finished difference Result 292 states and 312 transitions. [2022-01-31 17:05:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:05:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 17:05:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:30,238 INFO L225 Difference]: With dead ends: 292 [2022-01-31 17:05:30,238 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:05:30,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:05:30,242 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 240 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:30,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 75 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:05:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-01-31 17:05:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.043824701195219) internal successors, (262), 251 states have internal predecessors, (262), 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 17:05:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 267 transitions. [2022-01-31 17:05:30,331 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 267 transitions. Word has length 241 [2022-01-31 17:05:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:30,331 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 267 transitions. [2022-01-31 17:05:30,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.081081081081081) internal successors, (231), 110 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 267 transitions. [2022-01-31 17:05:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:05:30,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:30,332 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:30,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:05:30,332 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -180873071, now seen corresponding path program 109 times [2022-01-31 17:05:30,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:30,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92456672] [2022-01-31 17:05:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:30,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:30,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:30,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:30,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:33,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:33,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:33,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92456672] [2022-01-31 17:05:33,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92456672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:33,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:33,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:05:33,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830306003] [2022-01-31 17:05:33,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:33,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:05:33,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:05:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:05:33,208 INFO L87 Difference]: Start difference. First operand 257 states and 267 transitions. Second operand has 112 states, 112 states have (on average 2.080357142857143) internal successors, (233), 111 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 17:05:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:36,898 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2022-01-31 17:05:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:05:36,898 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.080357142857143) internal successors, (233), 111 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 243 [2022-01-31 17:05:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:36,898 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:05:36,899 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 17:05:36,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:05:36,901 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 242 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:36,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 55 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 17:05:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-01-31 17:05:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.0434782608695652) internal successors, (264), 253 states have internal predecessors, (264), 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 17:05:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 269 transitions. [2022-01-31 17:05:36,981 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 269 transitions. Word has length 243 [2022-01-31 17:05:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:36,981 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 269 transitions. [2022-01-31 17:05:36,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.080357142857143) internal successors, (233), 111 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 17:05:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 269 transitions. [2022-01-31 17:05:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:05:36,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:36,982 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:36,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:05:36,982 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1003903535, now seen corresponding path program 110 times [2022-01-31 17:05:36,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:36,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838170994] [2022-01-31 17:05:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:36,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:36,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:36,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:36,990 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:40,457 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 17:05:40,458 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838170994] [2022-01-31 17:05:40,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838170994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:40,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:40,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:05:40,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477488627] [2022-01-31 17:05:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:40,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:05:40,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:05:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:05:40,460 INFO L87 Difference]: Start difference. First operand 259 states and 269 transitions. Second operand has 113 states, 113 states have (on average 2.079646017699115) internal successors, (235), 112 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:43,910 INFO L93 Difference]: Finished difference Result 296 states and 316 transitions. [2022-01-31 17:05:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:05:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.079646017699115) internal successors, (235), 112 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 17:05:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:43,911 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:05:43,911 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 17:05:43,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:05:43,915 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:43,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 75 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 17:05:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-01-31 17:05:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.0431372549019609) internal successors, (266), 255 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:05:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 271 transitions. [2022-01-31 17:05:43,994 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 271 transitions. Word has length 245 [2022-01-31 17:05:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:43,994 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 271 transitions. [2022-01-31 17:05:43,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.079646017699115) internal successors, (235), 112 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 271 transitions. [2022-01-31 17:05:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:05:43,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:43,995 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:43,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:05:43,995 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1407888461, now seen corresponding path program 111 times [2022-01-31 17:05:43,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:43,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735291392] [2022-01-31 17:05:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:43,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:43,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:43,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:44,003 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:47,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:47,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:47,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735291392] [2022-01-31 17:05:47,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [735291392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:47,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:47,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:05:47,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107672832] [2022-01-31 17:05:47,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:47,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:05:47,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:05:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:05:47,914 INFO L87 Difference]: Start difference. First operand 261 states and 271 transitions. Second operand has 114 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 113 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:51,896 INFO L93 Difference]: Finished difference Result 298 states and 318 transitions. [2022-01-31 17:05:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:05:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 113 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:05:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:51,897 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:05:51,897 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:05:51,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:05:51,899 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 246 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:51,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 65 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:05:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2022-01-31 17:05:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.0428015564202335) internal successors, (268), 257 states have internal predecessors, (268), 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 17:05:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 273 transitions. [2022-01-31 17:05:51,980 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 273 transitions. Word has length 247 [2022-01-31 17:05:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:51,980 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 273 transitions. [2022-01-31 17:05:51,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 113 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:05:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 273 transitions. [2022-01-31 17:05:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:05:51,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:51,981 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:51,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:05:51,982 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1204621589, now seen corresponding path program 112 times [2022-01-31 17:05:51,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:51,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439932372] [2022-01-31 17:05:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:51,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:51,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:51,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:51,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:05:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:05:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:05:55,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:05:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439932372] [2022-01-31 17:05:55,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1439932372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:05:55,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:05:55,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:05:55,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481876582] [2022-01-31 17:05:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:05:55,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:05:55,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:05:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:05:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:05:55,628 INFO L87 Difference]: Start difference. First operand 263 states and 273 transitions. Second operand has 115 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 114 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 17:05:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:05:59,118 INFO L93 Difference]: Finished difference Result 300 states and 320 transitions. [2022-01-31 17:05:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:05:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 114 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 249 [2022-01-31 17:05:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:05:59,119 INFO L225 Difference]: With dead ends: 300 [2022-01-31 17:05:59,119 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 17:05:59,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:05:59,122 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 248 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:05:59,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 50 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:05:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 17:05:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-01-31 17:05:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 259 states have (on average 1.0424710424710424) internal successors, (270), 259 states have internal predecessors, (270), 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 17:05:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 275 transitions. [2022-01-31 17:05:59,205 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 275 transitions. Word has length 249 [2022-01-31 17:05:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:05:59,205 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 275 transitions. [2022-01-31 17:05:59,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 114 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 17:05:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 275 transitions. [2022-01-31 17:05:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:05:59,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:05:59,206 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:05:59,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:05:59,206 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:05:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:05:59,207 INFO L85 PathProgramCache]: Analyzing trace with hash 729088521, now seen corresponding path program 113 times [2022-01-31 17:05:59,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:05:59,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701214452] [2022-01-31 17:05:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:05:59,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:05:59,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:05:59,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:05:59,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:05:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:01,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:01,924 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 17:06:01,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:01,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701214452] [2022-01-31 17:06:01,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701214452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:01,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:01,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:06:01,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666297479] [2022-01-31 17:06:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:01,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:06:01,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:06:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:06:01,928 INFO L87 Difference]: Start difference. First operand 265 states and 275 transitions. Second operand has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:05,392 INFO L93 Difference]: Finished difference Result 302 states and 322 transitions. [2022-01-31 17:06:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:06:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:06:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:05,394 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:06:05,394 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 17:06:05,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:06:05,397 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 250 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:05,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 70 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:05,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 17:06:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-01-31 17:06:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.0421455938697317) internal successors, (272), 261 states have internal predecessors, (272), 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 17:06:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 277 transitions. [2022-01-31 17:06:05,482 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 277 transitions. Word has length 251 [2022-01-31 17:06:05,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:05,482 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 277 transitions. [2022-01-31 17:06:05,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0775862068965516) internal successors, (241), 115 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 277 transitions. [2022-01-31 17:06:05,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:06:05,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:05,483 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:05,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:06:05,483 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -696334937, now seen corresponding path program 114 times [2022-01-31 17:06:05,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:05,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919818084] [2022-01-31 17:06:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:05,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:05,484 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:05,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:05,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:09,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:09,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919818084] [2022-01-31 17:06:09,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919818084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:09,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:09,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:06:09,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678335754] [2022-01-31 17:06:09,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:09,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:06:09,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:06:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:06:09,598 INFO L87 Difference]: Start difference. First operand 267 states and 277 transitions. Second operand has 117 states, 117 states have (on average 2.076923076923077) internal successors, (243), 116 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:14,172 INFO L93 Difference]: Finished difference Result 304 states and 324 transitions. [2022-01-31 17:06:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:06:14,172 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.076923076923077) internal successors, (243), 116 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-01-31 17:06:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:14,173 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:06:14,173 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 17:06:14,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:06:14,177 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 252 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:14,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 50 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 17:06:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2022-01-31 17:06:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 263 states have (on average 1.0418250950570342) internal successors, (274), 263 states have internal predecessors, (274), 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 17:06:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 279 transitions. [2022-01-31 17:06:14,267 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 279 transitions. Word has length 253 [2022-01-31 17:06:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:14,267 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 279 transitions. [2022-01-31 17:06:14,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.076923076923077) internal successors, (243), 116 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 279 transitions. [2022-01-31 17:06:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:06:14,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:14,268 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:14,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:06:14,268 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash -433710651, now seen corresponding path program 115 times [2022-01-31 17:06:14,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:14,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873513809] [2022-01-31 17:06:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:14,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:14,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:14,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:14,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:16,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873513809] [2022-01-31 17:06:16,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [873513809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:16,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:16,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:06:16,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757828070] [2022-01-31 17:06:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:06:16,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:06:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:06:16,925 INFO L87 Difference]: Start difference. First operand 269 states and 279 transitions. Second operand has 118 states, 118 states have (on average 2.0762711864406778) internal successors, (245), 117 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 17:06:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:20,049 INFO L93 Difference]: Finished difference Result 306 states and 326 transitions. [2022-01-31 17:06:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:06:20,049 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0762711864406778) internal successors, (245), 117 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 255 [2022-01-31 17:06:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:20,050 INFO L225 Difference]: With dead ends: 306 [2022-01-31 17:06:20,050 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 17:06:20,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:06:20,054 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 254 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:20,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 50 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 17:06:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-01-31 17:06:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.0415094339622641) internal successors, (276), 265 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 281 transitions. [2022-01-31 17:06:20,140 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 281 transitions. Word has length 255 [2022-01-31 17:06:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:20,140 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 281 transitions. [2022-01-31 17:06:20,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0762711864406778) internal successors, (245), 117 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 17:06:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 281 transitions. [2022-01-31 17:06:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:06:20,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:20,141 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:06:20,141 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1454842269, now seen corresponding path program 116 times [2022-01-31 17:06:20,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:20,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340482592] [2022-01-31 17:06:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:20,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:20,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:20,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:20,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:23,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:23,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:23,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340482592] [2022-01-31 17:06:23,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340482592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:23,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:23,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:06:23,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805795422] [2022-01-31 17:06:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:06:23,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:06:23,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:06:23,700 INFO L87 Difference]: Start difference. First operand 271 states and 281 transitions. Second operand has 119 states, 119 states have (on average 2.0756302521008405) internal successors, (247), 118 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:27,442 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2022-01-31 17:06:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:06:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0756302521008405) internal successors, (247), 118 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 17:06:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:27,443 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:06:27,443 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 17:06:27,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:06:27,446 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 256 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:27,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 60 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 17:06:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2022-01-31 17:06:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 267 states have (on average 1.0411985018726593) internal successors, (278), 267 states have internal predecessors, (278), 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 17:06:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 283 transitions. [2022-01-31 17:06:27,557 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 283 transitions. Word has length 257 [2022-01-31 17:06:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:27,557 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 283 transitions. [2022-01-31 17:06:27,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0756302521008405) internal successors, (247), 118 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 283 transitions. [2022-01-31 17:06:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:06:27,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:27,558 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:27,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:06:27,558 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash 785183617, now seen corresponding path program 117 times [2022-01-31 17:06:27,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:27,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171530228] [2022-01-31 17:06:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:27,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:27,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:27,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:27,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:30,341 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171530228] [2022-01-31 17:06:30,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [171530228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:30,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:06:30,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284899500] [2022-01-31 17:06:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:30,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:06:30,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:06:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:06:30,344 INFO L87 Difference]: Start difference. First operand 273 states and 283 transitions. Second operand has 120 states, 120 states have (on average 2.075) internal successors, (249), 119 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:34,079 INFO L93 Difference]: Finished difference Result 310 states and 330 transitions. [2022-01-31 17:06:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:06:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.075) internal successors, (249), 119 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:06:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:34,080 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:06:34,080 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 17:06:34,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:06:34,084 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:34,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 60 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 17:06:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-01-31 17:06:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 269 states have internal predecessors, (280), 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 17:06:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 285 transitions. [2022-01-31 17:06:34,176 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 285 transitions. Word has length 259 [2022-01-31 17:06:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:34,177 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 285 transitions. [2022-01-31 17:06:34,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.075) internal successors, (249), 119 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 285 transitions. [2022-01-31 17:06:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:06:34,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:34,178 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:34,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:06:34,178 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:34,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1671444767, now seen corresponding path program 118 times [2022-01-31 17:06:34,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:34,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551724815] [2022-01-31 17:06:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:34,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:34,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:34,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:34,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:37,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:37,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551724815] [2022-01-31 17:06:37,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [551724815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:37,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:37,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:06:37,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059841021] [2022-01-31 17:06:37,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:37,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:06:37,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:37,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:06:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:06:37,055 INFO L87 Difference]: Start difference. First operand 275 states and 285 transitions. Second operand has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 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 17:06:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:40,685 INFO L93 Difference]: Finished difference Result 312 states and 332 transitions. [2022-01-31 17:06:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:06:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 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 261 [2022-01-31 17:06:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:40,686 INFO L225 Difference]: With dead ends: 312 [2022-01-31 17:06:40,686 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 17:06:40,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:06:40,689 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 260 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:40,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 80 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 17:06:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-01-31 17:06:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.040590405904059) internal successors, (282), 271 states have internal predecessors, (282), 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 17:06:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 287 transitions. [2022-01-31 17:06:40,790 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 287 transitions. Word has length 261 [2022-01-31 17:06:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:40,790 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 287 transitions. [2022-01-31 17:06:40,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.074380165289256) internal successors, (251), 120 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 17:06:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 287 transitions. [2022-01-31 17:06:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:06:40,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:40,791 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:40,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:06:40,791 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1330081987, now seen corresponding path program 119 times [2022-01-31 17:06:40,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:40,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071910339] [2022-01-31 17:06:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:40,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:40,792 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:40,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:40,799 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:44,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:44,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071910339] [2022-01-31 17:06:44,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071910339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:44,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:44,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:06:44,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914333278] [2022-01-31 17:06:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:44,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:06:44,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:44,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:06:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:06:44,356 INFO L87 Difference]: Start difference. First operand 277 states and 287 transitions. Second operand has 122 states, 122 states have (on average 2.0737704918032787) internal successors, (253), 121 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:47,965 INFO L93 Difference]: Finished difference Result 314 states and 334 transitions. [2022-01-31 17:06:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:06:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0737704918032787) internal successors, (253), 121 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:06:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:47,966 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:06:47,966 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 17:06:47,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:06:47,969 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 262 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:47,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 65 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 17:06:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2022-01-31 17:06:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.0402930402930404) internal successors, (284), 273 states have internal predecessors, (284), 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 17:06:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 289 transitions. [2022-01-31 17:06:48,063 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 289 transitions. Word has length 263 [2022-01-31 17:06:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:48,064 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 289 transitions. [2022-01-31 17:06:48,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0737704918032787) internal successors, (253), 121 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 289 transitions. [2022-01-31 17:06:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:06:48,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:48,064 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:48,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:06:48,065 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 420730331, now seen corresponding path program 120 times [2022-01-31 17:06:48,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:48,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566626234] [2022-01-31 17:06:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:48,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:48,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:48,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:48,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:50,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566626234] [2022-01-31 17:06:50,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566626234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:50,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:50,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:06:50,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246501912] [2022-01-31 17:06:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:50,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:06:50,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:06:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:06:50,951 INFO L87 Difference]: Start difference. First operand 279 states and 289 transitions. Second operand has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 122 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:06:54,736 INFO L93 Difference]: Finished difference Result 316 states and 336 transitions. [2022-01-31 17:06:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:06:54,737 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 122 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 17:06:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:06:54,737 INFO L225 Difference]: With dead ends: 316 [2022-01-31 17:06:54,737 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 17:06:54,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:06:54,739 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:06:54,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 60 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:06:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 17:06:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-01-31 17:06:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 275 states have (on average 1.04) internal successors, (286), 275 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:06:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 291 transitions. [2022-01-31 17:06:54,837 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 291 transitions. Word has length 265 [2022-01-31 17:06:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:06:54,837 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 291 transitions. [2022-01-31 17:06:54,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.073170731707317) internal successors, (255), 122 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:06:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 291 transitions. [2022-01-31 17:06:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:06:54,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:06:54,838 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:06:54,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:06:54,839 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:06:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:06:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -675812103, now seen corresponding path program 121 times [2022-01-31 17:06:54,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:06:54,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319449090] [2022-01-31 17:06:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:06:54,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:06:54,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:06:54,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:06:54,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:06:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:57,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:06:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:06:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:06:57,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:06:57,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319449090] [2022-01-31 17:06:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [319449090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:06:57,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:06:57,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:06:57,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003234122] [2022-01-31 17:06:57,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:06:57,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:06:57,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:06:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:06:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:06:57,816 INFO L87 Difference]: Start difference. First operand 281 states and 291 transitions. Second operand has 124 states, 124 states have (on average 2.0725806451612905) internal successors, (257), 123 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 17:07:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:01,801 INFO L93 Difference]: Finished difference Result 318 states and 338 transitions. [2022-01-31 17:07:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:07:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0725806451612905) internal successors, (257), 123 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 267 [2022-01-31 17:07:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:01,802 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:07:01,802 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 17:07:01,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:07:01,806 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:01,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 60 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 17:07:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-01-31 17:07:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.03971119133574) internal successors, (288), 277 states have internal predecessors, (288), 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 17:07:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 293 transitions. [2022-01-31 17:07:01,918 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 293 transitions. Word has length 267 [2022-01-31 17:07:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:01,918 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 293 transitions. [2022-01-31 17:07:01,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0725806451612905) internal successors, (257), 123 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 17:07:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 293 transitions. [2022-01-31 17:07:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:07:01,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:01,919 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:01,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:07:01,920 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2108863639, now seen corresponding path program 122 times [2022-01-31 17:07:01,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:01,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472296907] [2022-01-31 17:07:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:01,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:01,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:01,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:01,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:05,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:05,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472296907] [2022-01-31 17:07:05,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472296907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:05,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:05,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:07:05,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091387931] [2022-01-31 17:07:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:05,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:07:05,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:07:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:07:05,386 INFO L87 Difference]: Start difference. First operand 283 states and 293 transitions. Second operand has 125 states, 125 states have (on average 2.072) internal successors, (259), 124 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:09,278 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2022-01-31 17:07:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:07:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.072) internal successors, (259), 124 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 17:07:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:09,279 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:07:09,279 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 17:07:09,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:07:09,284 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:09,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 40 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 17:07:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2022-01-31 17:07:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 279 states have (on average 1.039426523297491) internal successors, (290), 279 states have internal predecessors, (290), 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 17:07:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 295 transitions. [2022-01-31 17:07:09,406 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 295 transitions. Word has length 269 [2022-01-31 17:07:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:09,406 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 295 transitions. [2022-01-31 17:07:09,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.072) internal successors, (259), 124 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:09,407 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 295 transitions. [2022-01-31 17:07:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:07:09,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:09,408 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:09,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:07:09,408 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1877341003, now seen corresponding path program 123 times [2022-01-31 17:07:09,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857334519] [2022-01-31 17:07:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:09,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:09,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:09,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:09,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:12,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:12,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857334519] [2022-01-31 17:07:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857334519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:12,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:12,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:07:12,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504592306] [2022-01-31 17:07:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:12,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:07:12,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:07:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:07:12,410 INFO L87 Difference]: Start difference. First operand 285 states and 295 transitions. Second operand has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:16,234 INFO L93 Difference]: Finished difference Result 322 states and 342 transitions. [2022-01-31 17:07:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:07:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:07:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:16,235 INFO L225 Difference]: With dead ends: 322 [2022-01-31 17:07:16,235 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:07:16,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:07:16,239 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 270 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:16,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 65 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:16,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:07:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-01-31 17:07:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.0391459074733096) internal successors, (292), 281 states have internal predecessors, (292), 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 17:07:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 297 transitions. [2022-01-31 17:07:16,356 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 297 transitions. Word has length 271 [2022-01-31 17:07:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:16,356 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 297 transitions. [2022-01-31 17:07:16,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0714285714285716) internal successors, (261), 125 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 297 transitions. [2022-01-31 17:07:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:07:16,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:16,357 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:16,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:07:16,357 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1509173933, now seen corresponding path program 124 times [2022-01-31 17:07:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:16,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919152494] [2022-01-31 17:07:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:16,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:16,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:16,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:16,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:19,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:19,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:19,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919152494] [2022-01-31 17:07:19,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919152494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:19,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:19,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:07:19,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163293993] [2022-01-31 17:07:19,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:19,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:07:19,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:19,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:07:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:07:19,434 INFO L87 Difference]: Start difference. First operand 287 states and 297 transitions. Second operand has 127 states, 127 states have (on average 2.0708661417322833) internal successors, (263), 126 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 17:07:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:23,434 INFO L93 Difference]: Finished difference Result 324 states and 344 transitions. [2022-01-31 17:07:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:07:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0708661417322833) internal successors, (263), 126 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 273 [2022-01-31 17:07:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:23,435 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:07:23,435 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 17:07:23,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:07:23,439 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 272 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:23,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 60 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 17:07:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-01-31 17:07:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 283 states have (on average 1.03886925795053) internal successors, (294), 283 states have internal predecessors, (294), 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 17:07:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 299 transitions. [2022-01-31 17:07:23,562 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 299 transitions. Word has length 273 [2022-01-31 17:07:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 299 transitions. [2022-01-31 17:07:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0708661417322833) internal successors, (263), 126 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 17:07:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 299 transitions. [2022-01-31 17:07:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:07:23,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:23,563 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:23,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:07:23,563 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash 112062065, now seen corresponding path program 125 times [2022-01-31 17:07:23,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:23,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507347844] [2022-01-31 17:07:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:23,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:23,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:23,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:23,572 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:28,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:28,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:28,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507347844] [2022-01-31 17:07:28,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507347844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:28,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:28,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:07:28,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161113488] [2022-01-31 17:07:28,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:28,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:07:28,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:07:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:07:28,417 INFO L87 Difference]: Start difference. First operand 289 states and 299 transitions. Second operand has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 127 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:32,396 INFO L93 Difference]: Finished difference Result 326 states and 346 transitions. [2022-01-31 17:07:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:07:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 127 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:07:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:32,397 INFO L225 Difference]: With dead ends: 326 [2022-01-31 17:07:32,397 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 17:07:32,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:07:32,401 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 274 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:32,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 65 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 17:07:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-01-31 17:07:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.03859649122807) internal successors, (296), 285 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:07:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 301 transitions. [2022-01-31 17:07:32,516 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 301 transitions. Word has length 275 [2022-01-31 17:07:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:32,516 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 301 transitions. [2022-01-31 17:07:32,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 127 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 301 transitions. [2022-01-31 17:07:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:07:32,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:32,517 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:32,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:07:32,517 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash -953272305, now seen corresponding path program 126 times [2022-01-31 17:07:32,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895928397] [2022-01-31 17:07:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:32,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:32,519 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:32,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:32,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:35,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:35,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:35,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895928397] [2022-01-31 17:07:35,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1895928397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:35,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:35,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:07:35,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905000377] [2022-01-31 17:07:35,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:35,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:07:35,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:07:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:07:35,661 INFO L87 Difference]: Start difference. First operand 291 states and 301 transitions. Second operand has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 128 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:39,730 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-01-31 17:07:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:07:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 128 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-01-31 17:07:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:39,730 INFO L225 Difference]: With dead ends: 328 [2022-01-31 17:07:39,731 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 17:07:39,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:07:39,735 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 276 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:39,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 50 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 17:07:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2022-01-31 17:07:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 287 states have (on average 1.038327526132404) internal successors, (298), 287 states have internal predecessors, (298), 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 17:07:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 303 transitions. [2022-01-31 17:07:39,863 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 303 transitions. Word has length 277 [2022-01-31 17:07:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:39,863 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 303 transitions. [2022-01-31 17:07:39,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0697674418604652) internal successors, (267), 128 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 303 transitions. [2022-01-31 17:07:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:07:39,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:39,864 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:39,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:07:39,864 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1757581869, now seen corresponding path program 127 times [2022-01-31 17:07:39,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:39,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246719607] [2022-01-31 17:07:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:39,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:39,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:39,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:39,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:43,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:43,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:43,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246719607] [2022-01-31 17:07:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [246719607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:43,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:43,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:07:43,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633026728] [2022-01-31 17:07:43,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:07:43,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:07:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:07:43,114 INFO L87 Difference]: Start difference. First operand 293 states and 303 transitions. Second operand has 130 states, 130 states have (on average 2.0692307692307694) internal successors, (269), 129 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 17:07:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:47,232 INFO L93 Difference]: Finished difference Result 330 states and 350 transitions. [2022-01-31 17:07:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:07:47,233 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0692307692307694) internal successors, (269), 129 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 279 [2022-01-31 17:07:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:47,233 INFO L225 Difference]: With dead ends: 330 [2022-01-31 17:07:47,233 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:07:47,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:07:47,236 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:47,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 55 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:07:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-01-31 17:07:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.0380622837370241) internal successors, (300), 289 states have internal predecessors, (300), 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 17:07:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 305 transitions. [2022-01-31 17:07:47,344 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 305 transitions. Word has length 279 [2022-01-31 17:07:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:47,344 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 305 transitions. [2022-01-31 17:07:47,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0692307692307694) internal successors, (269), 129 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 17:07:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 305 transitions. [2022-01-31 17:07:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:07:47,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:47,345 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:47,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:07:47,345 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash -156705589, now seen corresponding path program 128 times [2022-01-31 17:07:47,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:47,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436755694] [2022-01-31 17:07:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:47,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:47,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:47,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:47,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:50,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:50,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436755694] [2022-01-31 17:07:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436755694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:50,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:50,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:07:50,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385536400] [2022-01-31 17:07:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:50,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:07:50,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:07:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:07:50,594 INFO L87 Difference]: Start difference. First operand 295 states and 305 transitions. Second operand has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:07:54,918 INFO L93 Difference]: Finished difference Result 332 states and 352 transitions. [2022-01-31 17:07:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:07:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 17:07:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:07:54,919 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:07:54,919 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 17:07:54,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:07:54,922 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:07:54,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 60 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:07:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 17:07:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-01-31 17:07:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.0378006872852235) internal successors, (302), 291 states have internal predecessors, (302), 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 17:07:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 307 transitions. [2022-01-31 17:07:55,039 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 307 transitions. Word has length 281 [2022-01-31 17:07:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:07:55,040 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 307 transitions. [2022-01-31 17:07:55,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.068702290076336) internal successors, (271), 130 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:07:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 307 transitions. [2022-01-31 17:07:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:07:55,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:07:55,041 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:07:55,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:07:55,041 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:07:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:07:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1540950039, now seen corresponding path program 129 times [2022-01-31 17:07:55,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:07:55,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622193510] [2022-01-31 17:07:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:07:55,042 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:07:55,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:07:55,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:07:55,050 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:07:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:07:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:07:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:07:58,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:07:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622193510] [2022-01-31 17:07:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1622193510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:07:58,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:07:58,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:07:58,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303163384] [2022-01-31 17:07:58,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:07:58,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:07:58,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:07:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:07:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:07:58,350 INFO L87 Difference]: Start difference. First operand 297 states and 307 transitions. Second operand has 132 states, 132 states have (on average 2.0681818181818183) internal successors, (273), 131 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:02,780 INFO L93 Difference]: Finished difference Result 334 states and 354 transitions. [2022-01-31 17:08:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:08:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0681818181818183) internal successors, (273), 131 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:08:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:02,781 INFO L225 Difference]: With dead ends: 334 [2022-01-31 17:08:02,781 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 17:08:02,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:08:02,785 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 282 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:02,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 65 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 17:08:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-01-31 17:08:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 293 states have (on average 1.0375426621160408) internal successors, (304), 293 states have internal predecessors, (304), 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 17:08:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 309 transitions. [2022-01-31 17:08:02,896 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 309 transitions. Word has length 283 [2022-01-31 17:08:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:02,896 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 309 transitions. [2022-01-31 17:08:02,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0681818181818183) internal successors, (273), 131 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 309 transitions. [2022-01-31 17:08:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:08:02,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:02,898 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:02,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:08:02,898 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:02,898 INFO L85 PathProgramCache]: Analyzing trace with hash -360004729, now seen corresponding path program 130 times [2022-01-31 17:08:02,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:02,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200581227] [2022-01-31 17:08:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:02,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:02,899 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:02,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:02,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:06,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:06,362 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:06,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200581227] [2022-01-31 17:08:06,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200581227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:06,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:06,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:08:06,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426735331] [2022-01-31 17:08:06,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:06,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:08:06,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:08:06,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:08:06,366 INFO L87 Difference]: Start difference. First operand 299 states and 309 transitions. Second operand has 133 states, 133 states have (on average 2.0676691729323307) internal successors, (275), 132 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 17:08:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:10,698 INFO L93 Difference]: Finished difference Result 336 states and 356 transitions. [2022-01-31 17:08:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:08:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0676691729323307) internal successors, (275), 132 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 285 [2022-01-31 17:08:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:10,699 INFO L225 Difference]: With dead ends: 336 [2022-01-31 17:08:10,700 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 17:08:10,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:08:10,704 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:10,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 50 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 17:08:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-01-31 17:08:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 295 states have (on average 1.0372881355932204) internal successors, (306), 295 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 311 transitions. [2022-01-31 17:08:10,847 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 311 transitions. Word has length 285 [2022-01-31 17:08:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:10,848 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 311 transitions. [2022-01-31 17:08:10,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0676691729323307) internal successors, (275), 132 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 17:08:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 311 transitions. [2022-01-31 17:08:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:08:10,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:10,849 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:10,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:08:10,849 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash 657072037, now seen corresponding path program 131 times [2022-01-31 17:08:10,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:10,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111353700] [2022-01-31 17:08:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:10,850 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:10,850 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:10,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:10,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:14,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:14,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:14,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111353700] [2022-01-31 17:08:14,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111353700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:14,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:14,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:08:14,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663102596] [2022-01-31 17:08:14,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:14,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:08:14,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:08:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:08:14,338 INFO L87 Difference]: Start difference. First operand 301 states and 311 transitions. Second operand has 134 states, 134 states have (on average 2.0671641791044775) internal successors, (277), 133 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:18,761 INFO L93 Difference]: Finished difference Result 338 states and 358 transitions. [2022-01-31 17:08:18,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:08:18,761 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0671641791044775) internal successors, (277), 133 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:08:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:18,762 INFO L225 Difference]: With dead ends: 338 [2022-01-31 17:08:18,762 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:08:18,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:08:18,765 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:18,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 85 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:08:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-01-31 17:08:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.037037037037037) internal successors, (308), 297 states have internal predecessors, (308), 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 17:08:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 313 transitions. [2022-01-31 17:08:18,884 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 313 transitions. Word has length 287 [2022-01-31 17:08:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:18,885 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 313 transitions. [2022-01-31 17:08:18,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0671641791044775) internal successors, (277), 133 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 313 transitions. [2022-01-31 17:08:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 17:08:18,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:18,886 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:18,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:08:18,886 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1184699325, now seen corresponding path program 132 times [2022-01-31 17:08:18,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:18,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856894538] [2022-01-31 17:08:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:18,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:18,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:18,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:18,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:22,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:22,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:22,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856894538] [2022-01-31 17:08:22,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [856894538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:22,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:22,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:08:22,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476676281] [2022-01-31 17:08:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:22,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:08:22,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:08:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:08:22,503 INFO L87 Difference]: Start difference. First operand 303 states and 313 transitions. Second operand has 135 states, 135 states have (on average 2.066666666666667) internal successors, (279), 134 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:26,917 INFO L93 Difference]: Finished difference Result 340 states and 360 transitions. [2022-01-31 17:08:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:08:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.066666666666667) internal successors, (279), 134 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-01-31 17:08:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:26,918 INFO L225 Difference]: With dead ends: 340 [2022-01-31 17:08:26,918 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 17:08:26,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:08:26,922 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 288 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:26,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 50 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 17:08:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2022-01-31 17:08:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 299 states have (on average 1.0367892976588629) internal successors, (310), 299 states have internal predecessors, (310), 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 17:08:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 315 transitions. [2022-01-31 17:08:27,070 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 315 transitions. Word has length 289 [2022-01-31 17:08:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:27,070 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 315 transitions. [2022-01-31 17:08:27,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.066666666666667) internal successors, (279), 134 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 315 transitions. [2022-01-31 17:08:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:08:27,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:27,071 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:27,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:08:27,071 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1600452255, now seen corresponding path program 133 times [2022-01-31 17:08:27,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633139665] [2022-01-31 17:08:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:27,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:27,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:27,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:27,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:31,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:31,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633139665] [2022-01-31 17:08:31,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1633139665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:31,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:31,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:08:31,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883408606] [2022-01-31 17:08:31,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:31,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:08:31,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:31,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:08:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:08:31,432 INFO L87 Difference]: Start difference. First operand 305 states and 315 transitions. Second operand has 136 states, 136 states have (on average 2.0661764705882355) internal successors, (281), 135 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 17:08:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:36,239 INFO L93 Difference]: Finished difference Result 342 states and 362 transitions. [2022-01-31 17:08:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:08:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0661764705882355) internal successors, (281), 135 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 291 [2022-01-31 17:08:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:36,240 INFO L225 Difference]: With dead ends: 342 [2022-01-31 17:08:36,240 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 17:08:36,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:08:36,243 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 290 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:36,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 55 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 17:08:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-01-31 17:08:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.0365448504983388) internal successors, (312), 301 states have internal predecessors, (312), 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 17:08:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 317 transitions. [2022-01-31 17:08:36,372 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 317 transitions. Word has length 291 [2022-01-31 17:08:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:36,373 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 317 transitions. [2022-01-31 17:08:36,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0661764705882355) internal successors, (281), 135 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 17:08:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 317 transitions. [2022-01-31 17:08:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:08:36,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:36,374 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:36,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:08:36,374 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:36,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1707059457, now seen corresponding path program 134 times [2022-01-31 17:08:36,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:36,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395118066] [2022-01-31 17:08:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:36,375 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:36,375 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:36,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:36,383 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:39,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:39,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:39,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395118066] [2022-01-31 17:08:39,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395118066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:39,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:39,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:08:39,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952057231] [2022-01-31 17:08:39,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:39,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:08:39,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:08:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:08:39,919 INFO L87 Difference]: Start difference. First operand 307 states and 317 transitions. Second operand has 137 states, 137 states have (on average 2.065693430656934) internal successors, (283), 136 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:44,458 INFO L93 Difference]: Finished difference Result 344 states and 364 transitions. [2022-01-31 17:08:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:08:44,458 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.065693430656934) internal successors, (283), 136 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 17:08:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:44,459 INFO L225 Difference]: With dead ends: 344 [2022-01-31 17:08:44,459 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:08:44,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:08:44,463 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 292 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:44,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 55 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:08:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2022-01-31 17:08:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 303 states have (on average 1.0363036303630364) internal successors, (314), 303 states have internal predecessors, (314), 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 17:08:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 319 transitions. [2022-01-31 17:08:44,595 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 319 transitions. Word has length 293 [2022-01-31 17:08:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 319 transitions. [2022-01-31 17:08:44,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.065693430656934) internal successors, (283), 136 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 319 transitions. [2022-01-31 17:08:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:08:44,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:44,596 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:44,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:08:44,596 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1077365475, now seen corresponding path program 135 times [2022-01-31 17:08:44,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:44,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350117953] [2022-01-31 17:08:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:44,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:44,598 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:44,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:44,606 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:48,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:48,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:48,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350117953] [2022-01-31 17:08:48,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [350117953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:48,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:48,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:08:48,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061987948] [2022-01-31 17:08:48,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:48,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:08:48,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:08:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:08:48,017 INFO L87 Difference]: Start difference. First operand 309 states and 319 transitions. Second operand has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 137 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:08:52,602 INFO L93 Difference]: Finished difference Result 346 states and 366 transitions. [2022-01-31 17:08:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:08:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 137 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:08:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:08:52,603 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:08:52,603 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 17:08:52,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:08:52,606 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:08:52,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 35 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:08:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 17:08:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-01-31 17:08:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.0360655737704918) internal successors, (316), 305 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:08:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 321 transitions. [2022-01-31 17:08:52,735 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 321 transitions. Word has length 295 [2022-01-31 17:08:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:08:52,736 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 321 transitions. [2022-01-31 17:08:52,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 137 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:08:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 321 transitions. [2022-01-31 17:08:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:08:52,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:08:52,737 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:08:52,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:08:52,737 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:08:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:08:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1531837509, now seen corresponding path program 136 times [2022-01-31 17:08:52,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:08:52,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372038072] [2022-01-31 17:08:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:08:52,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:08:52,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:08:52,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:08:52,748 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:08:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:56,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:08:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:08:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:08:56,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:08:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372038072] [2022-01-31 17:08:56,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [372038072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:08:56,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:08:56,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:08:56,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572883963] [2022-01-31 17:08:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:08:56,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:08:56,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:08:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:08:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:08:56,301 INFO L87 Difference]: Start difference. First operand 311 states and 321 transitions. Second operand has 139 states, 139 states have (on average 2.064748201438849) internal successors, (287), 138 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 17:09:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:01,247 INFO L93 Difference]: Finished difference Result 348 states and 368 transitions. [2022-01-31 17:09:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:09:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.064748201438849) internal successors, (287), 138 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 297 [2022-01-31 17:09:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:01,248 INFO L225 Difference]: With dead ends: 348 [2022-01-31 17:09:01,248 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 17:09:01,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:09:01,250 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 296 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:01,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 65 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:09:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 17:09:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-01-31 17:09:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.0358306188925082) internal successors, (318), 307 states have internal predecessors, (318), 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 17:09:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2022-01-31 17:09:01,369 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 297 [2022-01-31 17:09:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:01,370 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2022-01-31 17:09:01,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.064748201438849) internal successors, (287), 138 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 17:09:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2022-01-31 17:09:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:09:01,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:01,371 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:01,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 17:09:01,371 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -192797991, now seen corresponding path program 137 times [2022-01-31 17:09:01,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:01,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068729553] [2022-01-31 17:09:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:01,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:01,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:01,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:01,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:05,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:05,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:05,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068729553] [2022-01-31 17:09:05,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068729553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:05,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:05,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:09:05,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922899020] [2022-01-31 17:09:05,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:05,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:09:05,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:05,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:09:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:09:05,075 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 140 states, 140 states have (on average 2.0642857142857145) internal successors, (289), 139 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:09,729 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2022-01-31 17:09:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:09:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0642857142857145) internal successors, (289), 139 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:09:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:09,730 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:09:09,730 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 17:09:09,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:09:09,734 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 298 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:09,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 60 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:09:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 17:09:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-01-31 17:09:09,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.035598705501618) internal successors, (320), 309 states have internal predecessors, (320), 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 17:09:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 325 transitions. [2022-01-31 17:09:09,871 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 325 transitions. Word has length 299 [2022-01-31 17:09:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:09,871 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 325 transitions. [2022-01-31 17:09:09,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0642857142857145) internal successors, (289), 139 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 325 transitions. [2022-01-31 17:09:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 17:09:09,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:09,873 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 17:09:09,873 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:09,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1866009993, now seen corresponding path program 138 times [2022-01-31 17:09:09,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:09,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134311171] [2022-01-31 17:09:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:09,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:09,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:09,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:09,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:15,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:15,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134311171] [2022-01-31 17:09:15,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [134311171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:15,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:15,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:09:15,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381721393] [2022-01-31 17:09:15,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:15,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:09:15,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:15,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:09:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:09:15,357 INFO L87 Difference]: Start difference. First operand 315 states and 325 transitions. Second operand has 141 states, 141 states have (on average 2.0638297872340425) internal successors, (291), 140 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:21,116 INFO L93 Difference]: Finished difference Result 352 states and 372 transitions. [2022-01-31 17:09:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:09:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0638297872340425) internal successors, (291), 140 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-01-31 17:09:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:21,117 INFO L225 Difference]: With dead ends: 352 [2022-01-31 17:09:21,117 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 17:09:21,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:09:21,121 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 300 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:21,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 50 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:09:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 17:09:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2022-01-31 17:09:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 311 states have (on average 1.0353697749196142) internal successors, (322), 311 states have internal predecessors, (322), 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 17:09:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 327 transitions. [2022-01-31 17:09:21,264 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 327 transitions. Word has length 301 [2022-01-31 17:09:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 327 transitions. [2022-01-31 17:09:21,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.0638297872340425) internal successors, (291), 140 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 327 transitions. [2022-01-31 17:09:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:09:21,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:21,266 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:21,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 17:09:21,266 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash 789992085, now seen corresponding path program 139 times [2022-01-31 17:09:21,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:21,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297384433] [2022-01-31 17:09:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:21,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:21,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:21,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:21,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:25,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297384433] [2022-01-31 17:09:25,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297384433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:25,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:25,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:09:25,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433701873] [2022-01-31 17:09:25,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:25,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:09:25,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:09:25,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:09:25,962 INFO L87 Difference]: Start difference. First operand 317 states and 327 transitions. Second operand has 142 states, 142 states have (on average 2.063380281690141) internal successors, (293), 141 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 17:09:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:32,280 INFO L93 Difference]: Finished difference Result 354 states and 374 transitions. [2022-01-31 17:09:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:09:32,280 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.063380281690141) internal successors, (293), 141 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 303 [2022-01-31 17:09:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:32,281 INFO L225 Difference]: With dead ends: 354 [2022-01-31 17:09:32,281 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 17:09:32,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:09:32,284 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 302 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:32,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 70 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:09:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 17:09:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2022-01-31 17:09:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 313 states have (on average 1.035143769968051) internal successors, (324), 313 states have internal predecessors, (324), 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 17:09:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 329 transitions. [2022-01-31 17:09:32,409 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 329 transitions. Word has length 303 [2022-01-31 17:09:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:32,409 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 329 transitions. [2022-01-31 17:09:32,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.063380281690141) internal successors, (293), 141 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 17:09:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 329 transitions. [2022-01-31 17:09:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:09:32,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:32,410 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:32,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 17:09:32,411 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1997415219, now seen corresponding path program 140 times [2022-01-31 17:09:32,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:32,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107620893] [2022-01-31 17:09:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:32,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:32,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:32,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:32,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:37,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107620893] [2022-01-31 17:09:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1107620893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:37,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:37,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 17:09:37,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45974824] [2022-01-31 17:09:37,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:37,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 17:09:37,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 17:09:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:09:37,556 INFO L87 Difference]: Start difference. First operand 319 states and 329 transitions. Second operand has 143 states, 143 states have (on average 2.062937062937063) internal successors, (295), 142 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:42,277 INFO L93 Difference]: Finished difference Result 356 states and 376 transitions. [2022-01-31 17:09:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 17:09:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.062937062937063) internal successors, (295), 142 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 17:09:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:42,278 INFO L225 Difference]: With dead ends: 356 [2022-01-31 17:09:42,278 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 17:09:42,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 17:09:42,281 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 304 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:42,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 60 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:09:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 17:09:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2022-01-31 17:09:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 315 states have (on average 1.034920634920635) internal successors, (326), 315 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:09:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 331 transitions. [2022-01-31 17:09:42,410 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 331 transitions. Word has length 305 [2022-01-31 17:09:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:42,410 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 331 transitions. [2022-01-31 17:09:42,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.062937062937063) internal successors, (295), 142 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 331 transitions. [2022-01-31 17:09:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:09:42,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:42,411 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 17:09:42,411 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1605090223, now seen corresponding path program 141 times [2022-01-31 17:09:42,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:42,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230586641] [2022-01-31 17:09:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:42,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:42,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:42,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:42,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:46,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230586641] [2022-01-31 17:09:46,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230586641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:46,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:46,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 17:09:46,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593914124] [2022-01-31 17:09:46,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:46,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 17:09:46,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 17:09:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 17:09:46,089 INFO L87 Difference]: Start difference. First operand 321 states and 331 transitions. Second operand has 144 states, 144 states have (on average 2.0625) internal successors, (297), 143 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:09:50,686 INFO L93 Difference]: Finished difference Result 358 states and 378 transitions. [2022-01-31 17:09:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 17:09:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0625) internal successors, (297), 143 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 17:09:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:09:50,687 INFO L225 Difference]: With dead ends: 358 [2022-01-31 17:09:50,687 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 17:09:50,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 17:09:50,690 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 306 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:09:50,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 45 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:09:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 17:09:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2022-01-31 17:09:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 317 states have (on average 1.0347003154574133) internal successors, (328), 317 states have internal predecessors, (328), 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 17:09:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 333 transitions. [2022-01-31 17:09:50,822 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 333 transitions. Word has length 307 [2022-01-31 17:09:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:09:50,822 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 333 transitions. [2022-01-31 17:09:50,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0625) internal successors, (297), 143 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:09:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 333 transitions. [2022-01-31 17:09:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 17:09:50,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:09:50,823 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:09:50,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 17:09:50,823 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:09:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:09:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1869179409, now seen corresponding path program 142 times [2022-01-31 17:09:50,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:09:50,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473385411] [2022-01-31 17:09:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:09:50,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:09:50,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:09:50,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:09:50,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:09:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:55,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:09:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:09:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:09:55,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:09:55,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473385411] [2022-01-31 17:09:55,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473385411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:09:55,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:09:55,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 17:09:55,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449594201] [2022-01-31 17:09:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:09:55,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 17:09:55,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:09:55,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 17:09:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:09:55,789 INFO L87 Difference]: Start difference. First operand 323 states and 333 transitions. Second operand has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 144 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 17:10:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:01,525 INFO L93 Difference]: Finished difference Result 360 states and 380 transitions. [2022-01-31 17:10:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 17:10:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 144 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 309 [2022-01-31 17:10:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:01,526 INFO L225 Difference]: With dead ends: 360 [2022-01-31 17:10:01,526 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 17:10:01,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 17:10:01,529 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 308 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:01,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 70 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:10:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 17:10:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2022-01-31 17:10:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 319 states have (on average 1.0344827586206897) internal successors, (330), 319 states have internal predecessors, (330), 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 17:10:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 335 transitions. [2022-01-31 17:10:01,669 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 335 transitions. Word has length 309 [2022-01-31 17:10:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:01,669 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 335 transitions. [2022-01-31 17:10:01,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0620689655172413) internal successors, (299), 144 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 17:10:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 335 transitions. [2022-01-31 17:10:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:10:01,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:01,670 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:01,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 17:10:01,670 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2039150605, now seen corresponding path program 143 times [2022-01-31 17:10:01,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:01,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473826974] [2022-01-31 17:10:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:01,672 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:01,672 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:01,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:01,683 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:05,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:05,481 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473826974] [2022-01-31 17:10:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473826974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:05,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 17:10:05,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683886138] [2022-01-31 17:10:05,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:05,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 17:10:05,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 17:10:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 17:10:05,485 INFO L87 Difference]: Start difference. First operand 325 states and 335 transitions. Second operand has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:10,405 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2022-01-31 17:10:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 17:10:10,405 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:10:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:10,406 INFO L225 Difference]: With dead ends: 362 [2022-01-31 17:10:10,406 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:10:10,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 17:10:10,409 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 310 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:10,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 60 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:10:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:10:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2022-01-31 17:10:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 321 states have (on average 1.0342679127725856) internal successors, (332), 321 states have internal predecessors, (332), 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 17:10:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 337 transitions. [2022-01-31 17:10:10,546 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 337 transitions. Word has length 311 [2022-01-31 17:10:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:10,546 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 337 transitions. [2022-01-31 17:10:10,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 145 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 337 transitions. [2022-01-31 17:10:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 17:10:10,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:10,548 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:10,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 17:10:10,548 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash -152089941, now seen corresponding path program 144 times [2022-01-31 17:10:10,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:10,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723907843] [2022-01-31 17:10:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:10,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:10,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:10,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:10,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:16,994 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:16,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723907843] [2022-01-31 17:10:16,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [723907843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:16,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:16,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 17:10:16,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494707393] [2022-01-31 17:10:16,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 17:10:16,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 17:10:16,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:10:16,999 INFO L87 Difference]: Start difference. First operand 327 states and 337 transitions. Second operand has 147 states, 147 states have (on average 2.061224489795918) internal successors, (303), 146 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:23,772 INFO L93 Difference]: Finished difference Result 364 states and 384 transitions. [2022-01-31 17:10:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 17:10:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.061224489795918) internal successors, (303), 146 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-01-31 17:10:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:23,773 INFO L225 Difference]: With dead ends: 364 [2022-01-31 17:10:23,773 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 17:10:23,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10439 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=31755, Invalid=52635, Unknown=0, NotChecked=0, Total=84390 [2022-01-31 17:10:23,776 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 312 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:23,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 65 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 17:10:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2022-01-31 17:10:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 323 states have (on average 1.0340557275541795) internal successors, (334), 323 states have internal predecessors, (334), 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 17:10:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 339 transitions. [2022-01-31 17:10:23,914 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 339 transitions. Word has length 313 [2022-01-31 17:10:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:23,914 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 339 transitions. [2022-01-31 17:10:23,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.061224489795918) internal successors, (303), 146 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 339 transitions. [2022-01-31 17:10:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:10:23,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:23,916 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:23,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 17:10:23,916 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1400279607, now seen corresponding path program 145 times [2022-01-31 17:10:23,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:23,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491436854] [2022-01-31 17:10:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:23,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:23,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:23,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:23,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:27,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:27,860 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 17:10:27,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:27,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491436854] [2022-01-31 17:10:27,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491436854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:27,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:27,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 17:10:27,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972597311] [2022-01-31 17:10:27,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:27,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 17:10:27,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:27,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 17:10:27,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 17:10:27,863 INFO L87 Difference]: Start difference. First operand 329 states and 339 transitions. Second operand has 148 states, 148 states have (on average 2.060810810810811) internal successors, (305), 147 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 17:10:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:33,190 INFO L93 Difference]: Finished difference Result 366 states and 386 transitions. [2022-01-31 17:10:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 17:10:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.060810810810811) internal successors, (305), 147 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 315 [2022-01-31 17:10:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:33,191 INFO L225 Difference]: With dead ends: 366 [2022-01-31 17:10:33,191 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 17:10:33,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=32193, Invalid=53363, Unknown=0, NotChecked=0, Total=85556 [2022-01-31 17:10:33,195 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 314 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:33,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 60 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:10:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 17:10:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2022-01-31 17:10:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.0338461538461539) internal successors, (336), 325 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:10:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 341 transitions. [2022-01-31 17:10:33,330 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 341 transitions. Word has length 315 [2022-01-31 17:10:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:33,330 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 341 transitions. [2022-01-31 17:10:33,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.060810810810811) internal successors, (305), 147 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 17:10:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 341 transitions. [2022-01-31 17:10:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 17:10:33,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:33,331 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:33,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 17:10:33,331 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1680294247, now seen corresponding path program 146 times [2022-01-31 17:10:33,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:33,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265079801] [2022-01-31 17:10:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:33,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:33,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:33,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:33,342 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:38,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:38,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:38,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265079801] [2022-01-31 17:10:38,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265079801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:38,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:38,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 17:10:38,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849396113] [2022-01-31 17:10:38,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:38,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 17:10:38,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 17:10:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:10:38,523 INFO L87 Difference]: Start difference. First operand 331 states and 341 transitions. Second operand has 149 states, 149 states have (on average 2.0604026845637584) internal successors, (307), 148 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:44,127 INFO L93 Difference]: Finished difference Result 368 states and 388 transitions. [2022-01-31 17:10:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 17:10:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0604026845637584) internal successors, (307), 148 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2022-01-31 17:10:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:44,128 INFO L225 Difference]: With dead ends: 368 [2022-01-31 17:10:44,128 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 17:10:44,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10730 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=32634, Invalid=54096, Unknown=0, NotChecked=0, Total=86730 [2022-01-31 17:10:44,132 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 316 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:44,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 55 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:10:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 17:10:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2022-01-31 17:10:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 327 states have (on average 1.033639143730887) internal successors, (338), 327 states have internal predecessors, (338), 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 17:10:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 343 transitions. [2022-01-31 17:10:44,294 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 343 transitions. Word has length 317 [2022-01-31 17:10:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:44,294 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 343 transitions. [2022-01-31 17:10:44,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0604026845637584) internal successors, (307), 148 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 343 transitions. [2022-01-31 17:10:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:10:44,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:44,295 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:44,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 17:10:44,295 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1415666299, now seen corresponding path program 147 times [2022-01-31 17:10:44,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:44,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053991727] [2022-01-31 17:10:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:44,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:44,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:44,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:44,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:48,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:48,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053991727] [2022-01-31 17:10:48,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053991727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:48,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:48,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 17:10:48,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483352730] [2022-01-31 17:10:48,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:48,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 17:10:48,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:48,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 17:10:48,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 17:10:48,453 INFO L87 Difference]: Start difference. First operand 333 states and 343 transitions. Second operand has 150 states, 150 states have (on average 2.06) internal successors, (309), 149 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:10:54,277 INFO L93 Difference]: Finished difference Result 370 states and 390 transitions. [2022-01-31 17:10:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 17:10:54,278 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.06) internal successors, (309), 149 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-01-31 17:10:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:10:54,278 INFO L225 Difference]: With dead ends: 370 [2022-01-31 17:10:54,278 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 17:10:54,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=33078, Invalid=54834, Unknown=0, NotChecked=0, Total=87912 [2022-01-31 17:10:54,282 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 318 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:10:54,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 75 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:10:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 17:10:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2022-01-31 17:10:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.033434650455927) internal successors, (340), 329 states have internal predecessors, (340), 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 17:10:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 345 transitions. [2022-01-31 17:10:54,438 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 345 transitions. Word has length 319 [2022-01-31 17:10:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:10:54,438 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 345 transitions. [2022-01-31 17:10:54,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.06) internal successors, (309), 149 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:10:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 345 transitions. [2022-01-31 17:10:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 17:10:54,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:10:54,439 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:10:54,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 17:10:54,440 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:10:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:10:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -221414877, now seen corresponding path program 148 times [2022-01-31 17:10:54,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:10:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582283542] [2022-01-31 17:10:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:10:54,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:10:54,441 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:10:54,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:10:54,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:10:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:59,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:10:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:10:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:10:59,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:10:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582283542] [2022-01-31 17:10:59,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582283542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:10:59,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:10:59,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 17:10:59,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682905105] [2022-01-31 17:10:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:10:59,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 17:10:59,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:10:59,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 17:10:59,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:10:59,473 INFO L87 Difference]: Start difference. First operand 335 states and 345 transitions. Second operand has 151 states, 151 states have (on average 2.0596026490066226) internal successors, (311), 150 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 17:11:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:04,698 INFO L93 Difference]: Finished difference Result 372 states and 392 transitions. [2022-01-31 17:11:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 17:11:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0596026490066226) internal successors, (311), 150 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 321 [2022-01-31 17:11:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:04,699 INFO L225 Difference]: With dead ends: 372 [2022-01-31 17:11:04,699 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 17:11:04,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11025 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 17:11:04,702 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 320 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:04,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 50 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:11:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 17:11:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2022-01-31 17:11:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 331 states have (on average 1.0332326283987916) internal successors, (342), 331 states have internal predecessors, (342), 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 17:11:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 347 transitions. [2022-01-31 17:11:04,842 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 347 transitions. Word has length 321 [2022-01-31 17:11:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:04,842 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 347 transitions. [2022-01-31 17:11:04,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.0596026490066226) internal successors, (311), 150 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 17:11:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 347 transitions. [2022-01-31 17:11:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:11:04,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:04,843 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:04,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 17:11:04,844 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash 697933633, now seen corresponding path program 149 times [2022-01-31 17:11:04,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:04,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863270052] [2022-01-31 17:11:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:04,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:04,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:04,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:04,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:11,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:11,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:11,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863270052] [2022-01-31 17:11:11,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [863270052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:11,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:11,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 17:11:11,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438274280] [2022-01-31 17:11:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:11,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 17:11:11,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:11,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 17:11:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 17:11:11,397 INFO L87 Difference]: Start difference. First operand 337 states and 347 transitions. Second operand has 152 states, 152 states have (on average 2.0592105263157894) internal successors, (313), 151 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:18,034 INFO L93 Difference]: Finished difference Result 374 states and 394 transitions. [2022-01-31 17:11:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 17:11:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0592105263157894) internal successors, (313), 151 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 17:11:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:18,035 INFO L225 Difference]: With dead ends: 374 [2022-01-31 17:11:18,035 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 17:11:18,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=33975, Invalid=56325, Unknown=0, NotChecked=0, Total=90300 [2022-01-31 17:11:18,039 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 322 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:18,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 55 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 17:11:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 339. [2022-01-31 17:11:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 333 states have (on average 1.033033033033033) internal successors, (344), 333 states have internal predecessors, (344), 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 17:11:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 349 transitions. [2022-01-31 17:11:18,186 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 349 transitions. Word has length 323 [2022-01-31 17:11:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:18,186 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 349 transitions. [2022-01-31 17:11:18,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0592105263157894) internal successors, (313), 151 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 349 transitions. [2022-01-31 17:11:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 17:11:18,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:18,187 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:18,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 17:11:18,187 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -571411233, now seen corresponding path program 150 times [2022-01-31 17:11:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200159571] [2022-01-31 17:11:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:18,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:18,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:18,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:18,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:24,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:24,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200159571] [2022-01-31 17:11:24,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [200159571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:24,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:24,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 17:11:24,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915616618] [2022-01-31 17:11:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:24,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 17:11:24,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 17:11:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:11:24,382 INFO L87 Difference]: Start difference. First operand 339 states and 349 transitions. Second operand has 153 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 152 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:30,976 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2022-01-31 17:11:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 17:11:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 152 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 325 [2022-01-31 17:11:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:30,977 INFO L225 Difference]: With dead ends: 376 [2022-01-31 17:11:30,977 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 17:11:30,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11324 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=34428, Invalid=57078, Unknown=0, NotChecked=0, Total=91506 [2022-01-31 17:11:30,982 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 324 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:30,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 55 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 17:11:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2022-01-31 17:11:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 335 states have (on average 1.0328358208955224) internal successors, (346), 335 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:11:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 351 transitions. [2022-01-31 17:11:31,147 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 351 transitions. Word has length 325 [2022-01-31 17:11:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 351 transitions. [2022-01-31 17:11:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 152 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 351 transitions. [2022-01-31 17:11:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:11:31,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:31,149 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:31,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 17:11:31,149 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -641115395, now seen corresponding path program 151 times [2022-01-31 17:11:31,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:31,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551690085] [2022-01-31 17:11:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:31,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:31,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:31,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:31,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:37,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:37,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:37,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551690085] [2022-01-31 17:11:37,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [551690085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:37,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:37,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 17:11:37,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479855352] [2022-01-31 17:11:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:37,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 17:11:37,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 17:11:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 17:11:37,635 INFO L87 Difference]: Start difference. First operand 341 states and 351 transitions. Second operand has 154 states, 154 states have (on average 2.0584415584415585) internal successors, (317), 153 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 17:11:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:43,746 INFO L93 Difference]: Finished difference Result 378 states and 398 transitions. [2022-01-31 17:11:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 17:11:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0584415584415585) internal successors, (317), 153 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 327 [2022-01-31 17:11:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:43,747 INFO L225 Difference]: With dead ends: 378 [2022-01-31 17:11:43,747 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 17:11:43,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11475 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=34884, Invalid=57836, Unknown=0, NotChecked=0, Total=92720 [2022-01-31 17:11:43,750 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 326 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:43,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 55 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:11:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 17:11:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2022-01-31 17:11:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 337 states have (on average 1.032640949554896) internal successors, (348), 337 states have internal predecessors, (348), 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 17:11:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 353 transitions. [2022-01-31 17:11:43,897 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 353 transitions. Word has length 327 [2022-01-31 17:11:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 353 transitions. [2022-01-31 17:11:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0584415584415585) internal successors, (317), 153 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 17:11:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 353 transitions. [2022-01-31 17:11:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 17:11:43,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:43,898 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 17:11:43,899 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1092661659, now seen corresponding path program 152 times [2022-01-31 17:11:43,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626340184] [2022-01-31 17:11:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:43,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:43,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:43,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:43,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:48,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:11:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:11:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:11:48,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:11:48,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626340184] [2022-01-31 17:11:48,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [626340184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:11:48,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:11:48,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 17:11:48,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525798657] [2022-01-31 17:11:48,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:11:48,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 17:11:48,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:11:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 17:11:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:11:48,356 INFO L87 Difference]: Start difference. First operand 343 states and 353 transitions. Second operand has 155 states, 155 states have (on average 2.0580645161290323) internal successors, (319), 154 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:11:54,751 INFO L93 Difference]: Finished difference Result 380 states and 400 transitions. [2022-01-31 17:11:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 17:11:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.0580645161290323) internal successors, (319), 154 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 329 [2022-01-31 17:11:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:11:54,752 INFO L225 Difference]: With dead ends: 380 [2022-01-31 17:11:54,752 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 17:11:54,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11627 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=35343, Invalid=58599, Unknown=0, NotChecked=0, Total=93942 [2022-01-31 17:11:54,757 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 328 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:11:54,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 85 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:11:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 17:11:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2022-01-31 17:11:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 339 states have (on average 1.0324483775811208) internal successors, (350), 339 states have internal predecessors, (350), 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 17:11:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 355 transitions. [2022-01-31 17:11:54,932 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 355 transitions. Word has length 329 [2022-01-31 17:11:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:11:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 355 transitions. [2022-01-31 17:11:54,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.0580645161290323) internal successors, (319), 154 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:11:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 355 transitions. [2022-01-31 17:11:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:11:54,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:11:54,934 INFO L514 BasicCegarLoop]: trace histogram [152, 152, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:11:54,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 17:11:54,934 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:11:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:11:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 805099705, now seen corresponding path program 153 times [2022-01-31 17:11:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:11:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61386566] [2022-01-31 17:11:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:11:54,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:11:54,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:11:54,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:11:54,946 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:11:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:01,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:01,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61386566] [2022-01-31 17:12:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [61386566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:01,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:01,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 17:12:01,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607885779] [2022-01-31 17:12:01,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:01,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 17:12:01,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 17:12:01,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 17:12:01,107 INFO L87 Difference]: Start difference. First operand 345 states and 355 transitions. Second operand has 156 states, 156 states have (on average 2.0576923076923075) internal successors, (321), 155 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:07,217 INFO L93 Difference]: Finished difference Result 382 states and 402 transitions. [2022-01-31 17:12:07,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 17:12:07,217 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.0576923076923075) internal successors, (321), 155 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:12:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:07,218 INFO L225 Difference]: With dead ends: 382 [2022-01-31 17:12:07,218 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 17:12:07,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11780 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=35805, Invalid=59367, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 17:12:07,222 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 330 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:07,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 55 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:12:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 17:12:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2022-01-31 17:12:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 341 states have (on average 1.032258064516129) internal successors, (352), 341 states have internal predecessors, (352), 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 17:12:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 357 transitions. [2022-01-31 17:12:07,390 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 357 transitions. Word has length 331 [2022-01-31 17:12:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:07,390 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 357 transitions. [2022-01-31 17:12:07,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.0576923076923075) internal successors, (321), 155 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 357 transitions. [2022-01-31 17:12:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 17:12:07,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:07,391 INFO L514 BasicCegarLoop]: trace histogram [153, 153, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 17:12:07,391 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -664031145, now seen corresponding path program 154 times [2022-01-31 17:12:07,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:07,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232283416] [2022-01-31 17:12:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:07,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:07,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:07,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:07,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:12,052 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:12,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232283416] [2022-01-31 17:12:12,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232283416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:12,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:12,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-01-31 17:12:12,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841364981] [2022-01-31 17:12:12,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:12,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-01-31 17:12:12,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:12,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-01-31 17:12:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:12:12,057 INFO L87 Difference]: Start difference. First operand 347 states and 357 transitions. Second operand has 157 states, 157 states have (on average 2.0573248407643314) internal successors, (323), 156 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 17:12:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:17,572 INFO L93 Difference]: Finished difference Result 384 states and 404 transitions. [2022-01-31 17:12:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 17:12:17,572 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.0573248407643314) internal successors, (323), 156 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 333 [2022-01-31 17:12:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:17,573 INFO L225 Difference]: With dead ends: 384 [2022-01-31 17:12:17,573 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 17:12:17,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11934 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=36270, Invalid=60140, Unknown=0, NotChecked=0, Total=96410 [2022-01-31 17:12:17,576 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 332 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:17,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 45 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:12:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 17:12:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2022-01-31 17:12:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 343 states have (on average 1.032069970845481) internal successors, (354), 343 states have internal predecessors, (354), 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 17:12:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 359 transitions. [2022-01-31 17:12:17,729 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 359 transitions. Word has length 333 [2022-01-31 17:12:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:17,729 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 359 transitions. [2022-01-31 17:12:17,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 2.0573248407643314) internal successors, (323), 156 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 17:12:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 359 transitions. [2022-01-31 17:12:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:12:17,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:17,731 INFO L514 BasicCegarLoop]: trace histogram [154, 154, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:17,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 17:12:17,731 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 545462389, now seen corresponding path program 155 times [2022-01-31 17:12:17,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:17,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59576255] [2022-01-31 17:12:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:17,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:17,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:17,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:17,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:22,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:22,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59576255] [2022-01-31 17:12:22,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [59576255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:22,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:22,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 17:12:22,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358428380] [2022-01-31 17:12:22,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:22,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 17:12:22,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 17:12:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 17:12:22,310 INFO L87 Difference]: Start difference. First operand 349 states and 359 transitions. Second operand has 158 states, 158 states have (on average 2.0569620253164556) internal successors, (325), 157 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:27,944 INFO L93 Difference]: Finished difference Result 386 states and 406 transitions. [2022-01-31 17:12:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 17:12:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0569620253164556) internal successors, (325), 157 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 17:12:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:27,945 INFO L225 Difference]: With dead ends: 386 [2022-01-31 17:12:27,945 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 17:12:27,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=36738, Invalid=60918, Unknown=0, NotChecked=0, Total=97656 [2022-01-31 17:12:27,948 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 334 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:27,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 60 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:12:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 17:12:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2022-01-31 17:12:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.0318840579710145) internal successors, (356), 345 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:12:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 361 transitions. [2022-01-31 17:12:28,108 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 361 transitions. Word has length 335 [2022-01-31 17:12:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:28,108 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 361 transitions. [2022-01-31 17:12:28,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0569620253164556) internal successors, (325), 157 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 361 transitions. [2022-01-31 17:12:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-31 17:12:28,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:28,109 INFO L514 BasicCegarLoop]: trace histogram [155, 155, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:28,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 17:12:28,110 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1067388653, now seen corresponding path program 156 times [2022-01-31 17:12:28,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259321812] [2022-01-31 17:12:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:28,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:28,111 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:28,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:28,122 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:33,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:33,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259321812] [2022-01-31 17:12:33,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [259321812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:33,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:33,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 17:12:33,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866746413] [2022-01-31 17:12:33,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:33,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 17:12:33,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 17:12:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:12:33,039 INFO L87 Difference]: Start difference. First operand 351 states and 361 transitions. Second operand has 159 states, 159 states have (on average 2.056603773584906) internal successors, (327), 158 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:38,891 INFO L93 Difference]: Finished difference Result 388 states and 408 transitions. [2022-01-31 17:12:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 17:12:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.056603773584906) internal successors, (327), 158 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 337 [2022-01-31 17:12:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:38,892 INFO L225 Difference]: With dead ends: 388 [2022-01-31 17:12:38,892 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 17:12:38,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12245 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=37209, Invalid=61701, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 17:12:38,897 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 336 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:38,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 40 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:12:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 17:12:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2022-01-31 17:12:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 347 states have (on average 1.031700288184438) internal successors, (358), 347 states have internal predecessors, (358), 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 17:12:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 363 transitions. [2022-01-31 17:12:39,070 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 363 transitions. Word has length 337 [2022-01-31 17:12:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:39,070 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 363 transitions. [2022-01-31 17:12:39,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.056603773584906) internal successors, (327), 158 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:12:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 363 transitions. [2022-01-31 17:12:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:12:39,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:39,072 INFO L514 BasicCegarLoop]: trace histogram [156, 156, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:39,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 17:12:39,072 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash -534046159, now seen corresponding path program 157 times [2022-01-31 17:12:39,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:39,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568085292] [2022-01-31 17:12:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:39,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:39,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:39,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:39,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:44,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:12:44,403 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568085292] [2022-01-31 17:12:44,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568085292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:44,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:44,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-01-31 17:12:44,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613754966] [2022-01-31 17:12:44,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:44,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 17:12:44,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 17:12:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 17:12:44,406 INFO L87 Difference]: Start difference. First operand 353 states and 363 transitions. Second operand has 160 states, 160 states have (on average 2.05625) internal successors, (329), 159 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 17:12:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:12:51,380 INFO L93 Difference]: Finished difference Result 390 states and 410 transitions. [2022-01-31 17:12:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 17:12:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.05625) internal successors, (329), 159 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 339 [2022-01-31 17:12:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:12:51,381 INFO L225 Difference]: With dead ends: 390 [2022-01-31 17:12:51,381 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 17:12:51,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12402 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=37683, Invalid=62489, Unknown=0, NotChecked=0, Total=100172 [2022-01-31 17:12:51,386 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 338 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:12:51,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 60 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:12:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 17:12:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2022-01-31 17:12:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.0315186246418337) internal successors, (360), 349 states have internal predecessors, (360), 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 17:12:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 365 transitions. [2022-01-31 17:12:51,564 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 365 transitions. Word has length 339 [2022-01-31 17:12:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:12:51,564 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 365 transitions. [2022-01-31 17:12:51,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 2.05625) internal successors, (329), 159 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 17:12:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 365 transitions. [2022-01-31 17:12:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 17:12:51,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:12:51,566 INFO L514 BasicCegarLoop]: trace histogram [157, 157, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:12:51,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 17:12:51,566 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:12:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:12:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash 906982351, now seen corresponding path program 158 times [2022-01-31 17:12:51,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:12:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751956445] [2022-01-31 17:12:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:12:51,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:12:51,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:12:51,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:12:51,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:12:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:12:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:12:56,165 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 17:12:56,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:12:56,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751956445] [2022-01-31 17:12:56,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751956445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:12:56,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:12:56,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 17:12:56,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819517238] [2022-01-31 17:12:56,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:12:56,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 17:12:56,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:12:56,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 17:12:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:12:56,170 INFO L87 Difference]: Start difference. First operand 355 states and 365 transitions. Second operand has 161 states, 161 states have (on average 2.0559006211180124) internal successors, (331), 160 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:02,149 INFO L93 Difference]: Finished difference Result 392 states and 412 transitions. [2022-01-31 17:13:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 17:13:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0559006211180124) internal successors, (331), 160 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-01-31 17:13:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:02,151 INFO L225 Difference]: With dead ends: 392 [2022-01-31 17:13:02,151 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 17:13:02,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12560 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2022-01-31 17:13:02,156 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 340 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:02,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 75 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-31 17:13:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2022-01-31 17:13:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 351 states have (on average 1.0313390313390314) internal successors, (362), 351 states have internal predecessors, (362), 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 17:13:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 367 transitions. [2022-01-31 17:13:02,340 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 367 transitions. Word has length 341 [2022-01-31 17:13:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:02,340 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 367 transitions. [2022-01-31 17:13:02,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.0559006211180124) internal successors, (331), 160 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 367 transitions. [2022-01-31 17:13:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 17:13:02,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:02,341 INFO L514 BasicCegarLoop]: trace histogram [158, 158, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:02,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 17:13:02,341 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:02,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1539056147, now seen corresponding path program 159 times [2022-01-31 17:13:02,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:02,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70898874] [2022-01-31 17:13:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:02,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:02,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:02,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:02,355 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:07,057 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70898874] [2022-01-31 17:13:07,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [70898874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:07,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:07,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-01-31 17:13:07,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621439950] [2022-01-31 17:13:07,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:07,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-01-31 17:13:07,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-01-31 17:13:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 17:13:07,062 INFO L87 Difference]: Start difference. First operand 357 states and 367 transitions. Second operand has 162 states, 162 states have (on average 2.0555555555555554) internal successors, (333), 161 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:13,504 INFO L93 Difference]: Finished difference Result 394 states and 414 transitions. [2022-01-31 17:13:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-31 17:13:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.0555555555555554) internal successors, (333), 161 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-01-31 17:13:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:13,505 INFO L225 Difference]: With dead ends: 394 [2022-01-31 17:13:13,505 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 17:13:13,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=38640, Invalid=64080, Unknown=0, NotChecked=0, Total=102720 [2022-01-31 17:13:13,509 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 342 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:13,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 50 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 17:13:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 359. [2022-01-31 17:13:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 353 states have (on average 1.0311614730878187) internal successors, (364), 353 states have internal predecessors, (364), 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 17:13:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 369 transitions. [2022-01-31 17:13:13,696 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 369 transitions. Word has length 343 [2022-01-31 17:13:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:13,696 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 369 transitions. [2022-01-31 17:13:13,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.0555555555555554) internal successors, (333), 161 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 369 transitions. [2022-01-31 17:13:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 17:13:13,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:13,698 INFO L514 BasicCegarLoop]: trace histogram [159, 159, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:13,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 17:13:13,698 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:13,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1460025483, now seen corresponding path program 160 times [2022-01-31 17:13:13,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:13,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651127443] [2022-01-31 17:13:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:13,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:13,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:13,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:13,712 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:18,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:18,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651127443] [2022-01-31 17:13:18,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [651127443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:18,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:18,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-01-31 17:13:18,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415290550] [2022-01-31 17:13:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:18,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-01-31 17:13:18,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-01-31 17:13:18,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:13:18,988 INFO L87 Difference]: Start difference. First operand 359 states and 369 transitions. Second operand has 163 states, 163 states have (on average 2.0552147239263805) internal successors, (335), 162 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 17:13:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:26,673 INFO L93 Difference]: Finished difference Result 396 states and 416 transitions. [2022-01-31 17:13:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 17:13:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.0552147239263805) internal successors, (335), 162 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 345 [2022-01-31 17:13:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:26,674 INFO L225 Difference]: With dead ends: 396 [2022-01-31 17:13:26,674 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 17:13:26,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12879 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=39123, Invalid=64883, Unknown=0, NotChecked=0, Total=104006 [2022-01-31 17:13:26,678 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 344 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:26,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 45 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:13:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 17:13:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2022-01-31 17:13:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.0309859154929577) internal successors, (366), 355 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:13:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 371 transitions. [2022-01-31 17:13:26,858 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 371 transitions. Word has length 345 [2022-01-31 17:13:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:26,859 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 371 transitions. [2022-01-31 17:13:26,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.0552147239263805) internal successors, (335), 162 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 17:13:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 371 transitions. [2022-01-31 17:13:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:13:26,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:26,860 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:26,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 17:13:26,860 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1654416297, now seen corresponding path program 161 times [2022-01-31 17:13:26,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:26,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999057814] [2022-01-31 17:13:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:26,861 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:26,861 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:26,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:26,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:13:32,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:32,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999057814] [2022-01-31 17:13:32,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999057814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:32,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:32,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-01-31 17:13:32,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955059819] [2022-01-31 17:13:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:32,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 17:13:32,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 17:13:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 17:13:32,861 INFO L87 Difference]: Start difference. First operand 361 states and 371 transitions. Second operand has 164 states, 164 states have (on average 2.0548780487804876) internal successors, (337), 163 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:39,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:39,081 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2022-01-31 17:13:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-31 17:13:39,082 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0548780487804876) internal successors, (337), 163 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:13:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:39,082 INFO L225 Difference]: With dead ends: 398 [2022-01-31 17:13:39,082 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 17:13:39,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13040 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=39609, Invalid=65691, Unknown=0, NotChecked=0, Total=105300 [2022-01-31 17:13:39,087 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 346 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:39,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 65 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 17:13:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 363. [2022-01-31 17:13:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 357 states have (on average 1.0308123249299719) internal successors, (368), 357 states have internal predecessors, (368), 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 17:13:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 373 transitions. [2022-01-31 17:13:39,270 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 373 transitions. Word has length 347 [2022-01-31 17:13:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:39,270 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 373 transitions. [2022-01-31 17:13:39,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0548780487804876) internal successors, (337), 163 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 373 transitions. [2022-01-31 17:13:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-01-31 17:13:39,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:39,272 INFO L514 BasicCegarLoop]: trace histogram [161, 161, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:39,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 17:13:39,272 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -514572473, now seen corresponding path program 162 times [2022-01-31 17:13:39,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:39,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762425187] [2022-01-31 17:13:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:39,273 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:39,273 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:39,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:39,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:45,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:13:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:13:45,845 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 17:13:45,845 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:13:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762425187] [2022-01-31 17:13:45,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762425187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:13:45,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:13:45,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 17:13:45,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023592893] [2022-01-31 17:13:45,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:13:45,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 17:13:45,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:13:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 17:13:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:13:45,857 INFO L87 Difference]: Start difference. First operand 363 states and 373 transitions. Second operand has 165 states, 165 states have (on average 2.0545454545454547) internal successors, (339), 164 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:13:52,546 INFO L93 Difference]: Finished difference Result 400 states and 420 transitions. [2022-01-31 17:13:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 17:13:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.0545454545454547) internal successors, (339), 164 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 349 [2022-01-31 17:13:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:13:52,561 INFO L225 Difference]: With dead ends: 400 [2022-01-31 17:13:52,561 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 17:13:52,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13202 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=40098, Invalid=66504, Unknown=0, NotChecked=0, Total=106602 [2022-01-31 17:13:52,567 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 348 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:13:52,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 60 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:13:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 17:13:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2022-01-31 17:13:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 359 states have (on average 1.0306406685236769) internal successors, (370), 359 states have internal predecessors, (370), 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 17:13:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 375 transitions. [2022-01-31 17:13:52,807 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 375 transitions. Word has length 349 [2022-01-31 17:13:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:13:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 375 transitions. [2022-01-31 17:13:52,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.0545454545454547) internal successors, (339), 164 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:13:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 375 transitions. [2022-01-31 17:13:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:13:52,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:13:52,808 INFO L514 BasicCegarLoop]: trace histogram [162, 162, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:13:52,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 17:13:52,808 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:13:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:13:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1853641883, now seen corresponding path program 163 times [2022-01-31 17:13:52,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:13:52,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384538847] [2022-01-31 17:13:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:13:52,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:13:52,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:13:52,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:13:52,824 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:13:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:01,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:01,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:01,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384538847] [2022-01-31 17:14:01,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384538847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:01,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:01,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-01-31 17:14:01,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384535595] [2022-01-31 17:14:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:01,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-01-31 17:14:01,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-01-31 17:14:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 17:14:01,241 INFO L87 Difference]: Start difference. First operand 365 states and 375 transitions. Second operand has 166 states, 166 states have (on average 2.0542168674698793) internal successors, (341), 165 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 17:14:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:09,342 INFO L93 Difference]: Finished difference Result 402 states and 422 transitions. [2022-01-31 17:14:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-31 17:14:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.0542168674698793) internal successors, (341), 165 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 351 [2022-01-31 17:14:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:09,358 INFO L225 Difference]: With dead ends: 402 [2022-01-31 17:14:09,359 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 17:14:09,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13365 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=40590, Invalid=67322, Unknown=0, NotChecked=0, Total=107912 [2022-01-31 17:14:09,362 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 350 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:09,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 70 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:14:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 17:14:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 367. [2022-01-31 17:14:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.0304709141274238) internal successors, (372), 361 states have internal predecessors, (372), 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 17:14:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 377 transitions. [2022-01-31 17:14:09,546 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 377 transitions. Word has length 351 [2022-01-31 17:14:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:09,547 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 377 transitions. [2022-01-31 17:14:09,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 2.0542168674698793) internal successors, (341), 165 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 17:14:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 377 transitions. [2022-01-31 17:14:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 17:14:09,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:09,548 INFO L514 BasicCegarLoop]: trace histogram [163, 163, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:09,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 17:14:09,548 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:09,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:09,548 INFO L85 PathProgramCache]: Analyzing trace with hash -209156093, now seen corresponding path program 164 times [2022-01-31 17:14:09,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:09,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339951945] [2022-01-31 17:14:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:09,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:09,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:09,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:09,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:16,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339951945] [2022-01-31 17:14:16,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [339951945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:16,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:16,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-01-31 17:14:16,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151723170] [2022-01-31 17:14:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:16,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-01-31 17:14:16,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-01-31 17:14:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:14:16,179 INFO L87 Difference]: Start difference. First operand 367 states and 377 transitions. Second operand has 167 states, 167 states have (on average 2.053892215568862) internal successors, (343), 166 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:24,356 INFO L93 Difference]: Finished difference Result 404 states and 424 transitions. [2022-01-31 17:14:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 17:14:24,356 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.053892215568862) internal successors, (343), 166 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-01-31 17:14:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:24,357 INFO L225 Difference]: With dead ends: 404 [2022-01-31 17:14:24,357 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 17:14:24,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13529 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=41085, Invalid=68145, Unknown=0, NotChecked=0, Total=109230 [2022-01-31 17:14:24,361 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 352 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:24,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 50 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:14:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 17:14:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 369. [2022-01-31 17:14:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.0303030303030303) internal successors, (374), 363 states have internal predecessors, (374), 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 17:14:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 379 transitions. [2022-01-31 17:14:24,578 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 379 transitions. Word has length 353 [2022-01-31 17:14:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:24,578 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 379 transitions. [2022-01-31 17:14:24,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.053892215568862) internal successors, (343), 166 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 379 transitions. [2022-01-31 17:14:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:14:24,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:24,580 INFO L514 BasicCegarLoop]: trace histogram [164, 164, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:24,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 17:14:24,580 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -406276831, now seen corresponding path program 165 times [2022-01-31 17:14:24,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933981845] [2022-01-31 17:14:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:24,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:24,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:24,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:24,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:30,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:30,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933981845] [2022-01-31 17:14:30,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [933981845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:30,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:30,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 17:14:30,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231436048] [2022-01-31 17:14:30,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:30,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 17:14:30,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 17:14:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 17:14:30,518 INFO L87 Difference]: Start difference. First operand 369 states and 379 transitions. Second operand has 168 states, 168 states have (on average 2.0535714285714284) internal successors, (345), 167 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:37,247 INFO L93 Difference]: Finished difference Result 406 states and 426 transitions. [2022-01-31 17:14:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-31 17:14:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.0535714285714284) internal successors, (345), 167 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:14:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:37,248 INFO L225 Difference]: With dead ends: 406 [2022-01-31 17:14:37,248 INFO L226 Difference]: Without dead ends: 372 [2022-01-31 17:14:37,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13694 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=41583, Invalid=68973, Unknown=0, NotChecked=0, Total=110556 [2022-01-31 17:14:37,253 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 354 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:37,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 65 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:14:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-31 17:14:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 371. [2022-01-31 17:14:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 365 states have (on average 1.0301369863013699) internal successors, (376), 365 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:14:37,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 381 transitions. [2022-01-31 17:14:37,448 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 381 transitions. Word has length 355 [2022-01-31 17:14:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 381 transitions. [2022-01-31 17:14:37,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 2.0535714285714284) internal successors, (345), 167 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:14:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 381 transitions. [2022-01-31 17:14:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 17:14:37,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:37,449 INFO L514 BasicCegarLoop]: trace histogram [165, 165, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:37,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-01-31 17:14:37,449 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:37,450 INFO L85 PathProgramCache]: Analyzing trace with hash -860745025, now seen corresponding path program 166 times [2022-01-31 17:14:37,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:37,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289726316] [2022-01-31 17:14:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:37,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:37,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:37,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:37,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:45,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:45,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289726316] [2022-01-31 17:14:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [289726316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:45,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:45,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-01-31 17:14:45,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130946092] [2022-01-31 17:14:45,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:45,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 17:14:45,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 17:14:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:14:45,553 INFO L87 Difference]: Start difference. First operand 371 states and 381 transitions. Second operand has 169 states, 169 states have (on average 2.0532544378698225) internal successors, (347), 168 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 17:14:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:14:53,452 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2022-01-31 17:14:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-31 17:14:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0532544378698225) internal successors, (347), 168 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 357 [2022-01-31 17:14:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:14:53,453 INFO L225 Difference]: With dead ends: 408 [2022-01-31 17:14:53,453 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 17:14:53,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13860 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=42084, Invalid=69806, Unknown=0, NotChecked=0, Total=111890 [2022-01-31 17:14:53,457 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 356 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:14:53,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 60 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:14:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 17:14:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2022-01-31 17:14:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 367 states have (on average 1.0299727520435968) internal successors, (378), 367 states have internal predecessors, (378), 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 17:14:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 383 transitions. [2022-01-31 17:14:53,645 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 383 transitions. Word has length 357 [2022-01-31 17:14:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:14:53,645 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 383 transitions. [2022-01-31 17:14:53,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0532544378698225) internal successors, (347), 168 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 17:14:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 383 transitions. [2022-01-31 17:14:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:14:53,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:14:53,646 INFO L514 BasicCegarLoop]: trace histogram [166, 166, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:14:53,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-01-31 17:14:53,646 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:14:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:14:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash 481984733, now seen corresponding path program 167 times [2022-01-31 17:14:53,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:14:53,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168396005] [2022-01-31 17:14:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:14:53,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:14:53,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:14:53,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:14:53,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:14:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:14:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:14:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:14:59,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:14:59,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168396005] [2022-01-31 17:14:59,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168396005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:14:59,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:14:59,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-01-31 17:14:59,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605570349] [2022-01-31 17:14:59,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:14:59,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 17:14:59,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:14:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 17:14:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 17:14:59,691 INFO L87 Difference]: Start difference. First operand 373 states and 383 transitions. Second operand has 170 states, 170 states have (on average 2.052941176470588) internal successors, (349), 169 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:07,218 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2022-01-31 17:15:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-31 17:15:07,218 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.052941176470588) internal successors, (349), 169 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 17:15:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:07,219 INFO L225 Difference]: With dead ends: 410 [2022-01-31 17:15:07,219 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 17:15:07,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14027 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=42588, Invalid=70644, Unknown=0, NotChecked=0, Total=113232 [2022-01-31 17:15:07,224 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 358 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:07,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 65 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:15:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 17:15:07,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 375. [2022-01-31 17:15:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 369 states have (on average 1.029810298102981) internal successors, (380), 369 states have internal predecessors, (380), 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 17:15:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 385 transitions. [2022-01-31 17:15:07,453 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 385 transitions. Word has length 359 [2022-01-31 17:15:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:07,454 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 385 transitions. [2022-01-31 17:15:07,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.052941176470588) internal successors, (349), 169 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 385 transitions. [2022-01-31 17:15:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 17:15:07,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:07,455 INFO L514 BasicCegarLoop]: trace histogram [167, 167, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:07,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-01-31 17:15:07,455 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1939873925, now seen corresponding path program 168 times [2022-01-31 17:15:07,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:07,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841786056] [2022-01-31 17:15:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:07,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:07,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:07,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:07,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:13,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:13,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841786056] [2022-01-31 17:15:13,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841786056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:13,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:13,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-01-31 17:15:13,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29950539] [2022-01-31 17:15:13,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:13,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-01-31 17:15:13,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-01-31 17:15:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:15:13,566 INFO L87 Difference]: Start difference. First operand 375 states and 385 transitions. Second operand has 171 states, 171 states have (on average 2.0526315789473686) internal successors, (351), 170 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:20,856 INFO L93 Difference]: Finished difference Result 412 states and 432 transitions. [2022-01-31 17:15:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-31 17:15:20,856 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.0526315789473686) internal successors, (351), 170 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-01-31 17:15:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:20,857 INFO L225 Difference]: With dead ends: 412 [2022-01-31 17:15:20,857 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 17:15:20,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14195 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=43095, Invalid=71487, Unknown=0, NotChecked=0, Total=114582 [2022-01-31 17:15:20,861 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 360 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:20,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 70 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:15:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 17:15:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 377. [2022-01-31 17:15:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 371 states have (on average 1.0296495956873315) internal successors, (382), 371 states have internal predecessors, (382), 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 17:15:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 387 transitions. [2022-01-31 17:15:21,079 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 387 transitions. Word has length 361 [2022-01-31 17:15:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:21,079 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 387 transitions. [2022-01-31 17:15:21,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 2.0526315789473686) internal successors, (351), 170 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 387 transitions. [2022-01-31 17:15:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:15:21,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:21,081 INFO L514 BasicCegarLoop]: trace histogram [168, 168, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:21,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-01-31 17:15:21,081 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1473769831, now seen corresponding path program 169 times [2022-01-31 17:15:21,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853915071] [2022-01-31 17:15:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:21,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:21,096 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:21,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:21,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:26,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:26,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:26,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853915071] [2022-01-31 17:15:26,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [853915071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:26,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:26,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2022-01-31 17:15:26,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780978884] [2022-01-31 17:15:26,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:26,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-01-31 17:15:26,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-01-31 17:15:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 17:15:26,997 INFO L87 Difference]: Start difference. First operand 377 states and 387 transitions. Second operand has 172 states, 172 states have (on average 2.052325581395349) internal successors, (353), 171 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)