/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/standard_copyInitSum_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:26:04,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:26:04,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:26:04,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:26:04,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:26:04,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:26:04,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:26:04,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:26:04,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:26:04,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:26:04,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:26:04,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:26:04,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:26:04,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:26:04,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:26:04,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:26:05,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:26:05,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:26:05,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:26:05,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:26:05,014 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 17:26:05,024 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:26:05,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:26:05,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:26:05,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:26:05,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:26:05,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:26:05,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:26:05,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:26:05,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:26:05,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:26:05,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:26:05,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:26:05,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:26:05,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:26:05,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:26:05,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:26:05,028 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:26:05,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:26:05,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:26:05,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:26:05,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:26:05,201 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:26:05,204 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:26:05,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2022-01-31 17:26:05,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e30236c82/a3087f1e5ca447068c30e60a71df72f8/FLAG6ad6dcc91 [2022-01-31 17:26:05,560 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:26:05,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum_ground.i [2022-01-31 17:26:05,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e30236c82/a3087f1e5ca447068c30e60a71df72f8/FLAG6ad6dcc91 [2022-01-31 17:26:06,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e30236c82/a3087f1e5ca447068c30e60a71df72f8 [2022-01-31 17:26:06,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:26:06,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:26:06,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:26:06,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:26:06,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:26:06,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18163618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06, skipping insertion in model container [2022-01-31 17:26:06,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:26:06,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:26:06,110 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/standard_copyInitSum_ground.i[860,873] [2022-01-31 17:26:06,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:26:06,139 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:26:06,146 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/standard_copyInitSum_ground.i[860,873] [2022-01-31 17:26:06,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:26:06,161 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:26:06,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06 WrapperNode [2022-01-31 17:26:06,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:26:06,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:26:06,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:26:06,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:26:06,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:26:06,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:26:06,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:26:06,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:26:06,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (1/1) ... [2022-01-31 17:26:06,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:26:06,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:26:06,267 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 17:26:06,269 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 17:26:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:26:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:26:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:26:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:26:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:26:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:26:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:26:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:26:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:26:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:26:06,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:26:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:26:06,339 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:26:06,340 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:26:06,415 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:26:06,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:26:06,419 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 17:26:06,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:26:06 BoogieIcfgContainer [2022-01-31 17:26:06,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:26:06,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:26:06,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:26:06,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:26:06,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:26:06" (1/3) ... [2022-01-31 17:26:06,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637a2a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:26:06, skipping insertion in model container [2022-01-31 17:26:06,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:06" (2/3) ... [2022-01-31 17:26:06,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637a2a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:26:06, skipping insertion in model container [2022-01-31 17:26:06,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:26:06" (3/3) ... [2022-01-31 17:26:06,425 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum_ground.i [2022-01-31 17:26:06,429 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:26:06,429 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:26:06,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:26:06,469 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 17:26:06,469 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:26:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 17:26:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 17:26:06,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:06,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:06,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1203830831, now seen corresponding path program 1 times [2022-01-31 17:26:06,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:06,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850874183] [2022-01-31 17:26:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:06,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:06,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:06,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850874183] [2022-01-31 17:26:06,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [850874183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:06,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:06,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:26:06,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522415464] [2022-01-31 17:26:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:06,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:26:06,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:26:06,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:26:06,680 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:06,737 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-01-31 17:26:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:26:06,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 17:26:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:06,743 INFO L225 Difference]: With dead ends: 51 [2022-01-31 17:26:06,743 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 17:26:06,744 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 17:26:06,747 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 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 17:26:06,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:26:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 17:26:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 17:26:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 17:26:06,783 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-01-31 17:26:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:06,783 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 17:26:06,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 17:26:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 17:26:06,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:06,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:06,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:26:06,784 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash -351167801, now seen corresponding path program 1 times [2022-01-31 17:26:06,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676466015] [2022-01-31 17:26:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:06,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:06,787 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:06,830 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:06,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676466015] [2022-01-31 17:26:06,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [676466015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:06,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:06,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:26:06,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807929632] [2022-01-31 17:26:06,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:26:06,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:26:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:26:06,832 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:06,900 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-01-31 17:26:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:26:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 17:26:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:06,901 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:26:06,901 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 17:26:06,901 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 17:26:06,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:06,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:26:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 17:26:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-31 17:26:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 17:26:06,908 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-01-31 17:26:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:06,908 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 17:26:06,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 17:26:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 17:26:06,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:06,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:06,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:26:06,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash -776685865, now seen corresponding path program 1 times [2022-01-31 17:26:06,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:06,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335190832] [2022-01-31 17:26:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:06,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:06,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:06,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:06,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:06,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335190832] [2022-01-31 17:26:06,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [335190832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:06,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:06,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:26:06,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765495545] [2022-01-31 17:26:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:06,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:26:06,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:26:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:26:06,995 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:07,083 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-01-31 17:26:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:26:07,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 17:26:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:07,084 INFO L225 Difference]: With dead ends: 53 [2022-01-31 17:26:07,084 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:26:07,085 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 17:26:07,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:07,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:26:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 17:26:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:07,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 17:26:07,092 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2022-01-31 17:26:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:07,092 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 17:26:07,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 17:26:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:26:07,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:07,093 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] [2022-01-31 17:26:07,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:26:07,093 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash -183493953, now seen corresponding path program 2 times [2022-01-31 17:26:07,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:07,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017533017] [2022-01-31 17:26:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:07,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:07,095 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:07,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:07,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:07,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:07,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017533017] [2022-01-31 17:26:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017533017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:07,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:07,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:26:07,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870962684] [2022-01-31 17:26:07,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:26:07,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:26:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:26:07,205 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 17:26:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:07,291 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-01-31 17:26:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:26:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 27 [2022-01-31 17:26:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:07,293 INFO L225 Difference]: With dead ends: 62 [2022-01-31 17:26:07,293 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 17:26:07,295 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 17:26:07,299 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:07,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 17:26:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-01-31 17:26:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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 17:26:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-01-31 17:26:07,305 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2022-01-31 17:26:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:07,305 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-01-31 17:26:07,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 17:26:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-01-31 17:26:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 17:26:07,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:07,306 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] [2022-01-31 17:26:07,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:26:07,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1279098417, now seen corresponding path program 3 times [2022-01-31 17:26:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:07,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734988114] [2022-01-31 17:26:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:07,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:07,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:07,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:07,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,374 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 17:26:07,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:07,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734988114] [2022-01-31 17:26:07,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734988114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:07,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:07,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:26:07,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147656523] [2022-01-31 17:26:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:26:07,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:26:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:26:07,376 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:07,471 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2022-01-31 17:26:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:26:07,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 17:26:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:07,473 INFO L225 Difference]: With dead ends: 71 [2022-01-31 17:26:07,474 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 17:26:07,474 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 17:26:07,475 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:07,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 17:26:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-01-31 17:26:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-01-31 17:26:07,481 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2022-01-31 17:26:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:07,481 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-01-31 17:26:07,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-01-31 17:26:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 17:26:07,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:07,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:07,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:26:07,483 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1920744777, now seen corresponding path program 4 times [2022-01-31 17:26:07,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435971539] [2022-01-31 17:26:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:07,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:07,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:07,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:07,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,562 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 17:26:07,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435971539] [2022-01-31 17:26:07,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435971539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:07,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:07,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:26:07,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90414424] [2022-01-31 17:26:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:07,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:26:07,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:26:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:26:07,564 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:07,711 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-01-31 17:26:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:26:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 17:26:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:07,714 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:26:07,714 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 17:26:07,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:26:07,717 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:07,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 38 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 17:26:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-01-31 17:26:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-01-31 17:26:07,736 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2022-01-31 17:26:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:07,736 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-01-31 17:26:07,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-01-31 17:26:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 17:26:07,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:07,738 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:07,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:26:07,739 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1111274695, now seen corresponding path program 5 times [2022-01-31 17:26:07,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:07,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605497327] [2022-01-31 17:26:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:07,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:07,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:07,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:07,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:07,835 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:07,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605497327] [2022-01-31 17:26:07,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605497327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:07,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:07,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:26:07,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979886212] [2022-01-31 17:26:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:07,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:26:07,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:07,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:26:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:26:07,837 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 17:26:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:07,948 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-01-31 17:26:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:26:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 42 [2022-01-31 17:26:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:07,951 INFO L225 Difference]: With dead ends: 89 [2022-01-31 17:26:07,952 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:26:07,952 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 17:26:07,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:07,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 38 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:26:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-01-31 17:26:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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 17:26:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-31 17:26:07,972 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2022-01-31 17:26:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:07,973 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-31 17:26:07,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 17:26:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-31 17:26:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:26:07,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:07,978 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:07,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:26:07,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1135832401, now seen corresponding path program 6 times [2022-01-31 17:26:07,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:07,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039061269] [2022-01-31 17:26:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:07,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:07,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:07,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:07,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:08,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039061269] [2022-01-31 17:26:08,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039061269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:08,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:08,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:26:08,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669433677] [2022-01-31 17:26:08,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:08,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:26:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:26:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:26:08,057 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 17:26:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:08,180 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-01-31 17:26:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:26:08,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 47 [2022-01-31 17:26:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:08,181 INFO L225 Difference]: With dead ends: 98 [2022-01-31 17:26:08,181 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 17:26:08,182 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 17:26:08,182 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:08,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 38 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 17:26:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-01-31 17:26:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-01-31 17:26:08,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2022-01-31 17:26:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:08,188 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-01-31 17:26:08,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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 17:26:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-01-31 17:26:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 17:26:08,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:08,189 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:26:08,189 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1274236863, now seen corresponding path program 7 times [2022-01-31 17:26:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:08,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415926549] [2022-01-31 17:26:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:08,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:08,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:08,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:08,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:08,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415926549] [2022-01-31 17:26:08,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415926549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:08,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:08,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:26:08,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060515659] [2022-01-31 17:26:08,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:08,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:26:08,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:26:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:26:08,262 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:08,393 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2022-01-31 17:26:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:26:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 17:26:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:08,393 INFO L225 Difference]: With dead ends: 107 [2022-01-31 17:26:08,394 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:26:08,396 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 17:26:08,398 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:08,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 38 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:26:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-01-31 17:26:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 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 17:26:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-01-31 17:26:08,410 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2022-01-31 17:26:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:08,410 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-01-31 17:26:08,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-01-31 17:26:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:26:08,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:08,411 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:08,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:26:08,411 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2001373863, now seen corresponding path program 8 times [2022-01-31 17:26:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:08,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366142530] [2022-01-31 17:26:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:08,413 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:08,413 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:08,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:08,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,532 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 17:26:08,533 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366142530] [2022-01-31 17:26:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366142530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:08,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:08,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:26:08,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880449298] [2022-01-31 17:26:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:26:08,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:26:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:26:08,534 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:26:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:08,688 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-01-31 17:26:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:26:08,689 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 57 [2022-01-31 17:26:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:08,689 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:26:08,689 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 17:26:08,690 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 17:26:08,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:08,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 33 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 17:26:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-01-31 17:26:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-01-31 17:26:08,695 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2022-01-31 17:26:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:08,695 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-01-31 17:26:08,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 17:26:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-01-31 17:26:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 17:26:08,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:08,696 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:08,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:26:08,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1581886793, now seen corresponding path program 9 times [2022-01-31 17:26:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450264079] [2022-01-31 17:26:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:08,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:08,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:08,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:08,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:08,794 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:08,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450264079] [2022-01-31 17:26:08,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1450264079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:08,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:08,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:26:08,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370723831] [2022-01-31 17:26:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:26:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:26:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:26:08,795 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:08,992 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-01-31 17:26:08,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:26:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 17:26:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:08,993 INFO L225 Difference]: With dead ends: 125 [2022-01-31 17:26:08,993 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:26:08,994 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 17:26:08,994 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:08,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 28 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:26:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-01-31 17:26:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 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 17:26:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-01-31 17:26:08,999 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2022-01-31 17:26:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:08,999 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-01-31 17:26:08,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-01-31 17:26:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:26:08,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:08,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:09,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:26:09,000 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 576563871, now seen corresponding path program 10 times [2022-01-31 17:26:09,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342888230] [2022-01-31 17:26:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:09,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:09,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:09,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:09,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:09,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:09,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342888230] [2022-01-31 17:26:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342888230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:09,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:09,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:26:09,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728919141] [2022-01-31 17:26:09,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:09,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:26:09,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:26:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:26:09,093 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 17:26:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:09,270 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2022-01-31 17:26:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:26:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 67 [2022-01-31 17:26:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:09,271 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:26:09,271 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:26:09,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:26:09,272 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:09,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 38 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:26:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-01-31 17:26:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-01-31 17:26:09,277 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2022-01-31 17:26:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:09,277 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-01-31 17:26:09,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 17:26:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-01-31 17:26:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 17:26:09,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:09,278 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:09,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:26:09,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:09,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1772765777, now seen corresponding path program 11 times [2022-01-31 17:26:09,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:09,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129838964] [2022-01-31 17:26:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:09,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:09,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:09,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:09,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,378 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 17:26:09,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:09,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129838964] [2022-01-31 17:26:09,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129838964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:09,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:09,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:26:09,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014283506] [2022-01-31 17:26:09,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:26:09,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:26:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:26:09,379 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:09,574 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2022-01-31 17:26:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:26:09,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 17:26:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:09,575 INFO L225 Difference]: With dead ends: 143 [2022-01-31 17:26:09,575 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 17:26:09,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:26:09,576 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:09,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 43 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 17:26:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-01-31 17:26:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 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 17:26:09,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-01-31 17:26:09,581 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2022-01-31 17:26:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:09,582 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-01-31 17:26:09,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-01-31 17:26:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:26:09,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:09,582 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:09,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:26:09,582 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash 258339479, now seen corresponding path program 12 times [2022-01-31 17:26:09,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:09,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971820254] [2022-01-31 17:26:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:09,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:09,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:09,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:09,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:09,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:09,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971820254] [2022-01-31 17:26:09,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1971820254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:09,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:09,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:26:09,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803187658] [2022-01-31 17:26:09,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:09,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:26:09,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:26:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:26:09,693 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:26:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:09,912 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2022-01-31 17:26:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:26:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 77 [2022-01-31 17:26:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:09,913 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:26:09,913 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 17:26:09,913 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 17:26:09,913 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:09,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 38 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 17:26:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-01-31 17:26:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-01-31 17:26:09,919 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2022-01-31 17:26:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:09,920 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-01-31 17:26:09,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:26:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-01-31 17:26:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:26:09,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:09,920 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:09,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:26:09,920 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2124517543, now seen corresponding path program 13 times [2022-01-31 17:26:09,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415691519] [2022-01-31 17:26:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:09,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:09,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:09,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:09,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:10,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:10,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:10,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415691519] [2022-01-31 17:26:10,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [415691519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:10,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:10,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:26:10,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239501726] [2022-01-31 17:26:10,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:10,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:26:10,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:26:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:26:10,037 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:10,276 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2022-01-31 17:26:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:26:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 17:26:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:10,276 INFO L225 Difference]: With dead ends: 161 [2022-01-31 17:26:10,276 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:26:10,277 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 17:26:10,277 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:10,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 43 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:26:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-01-31 17:26:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 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 17:26:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-01-31 17:26:10,284 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2022-01-31 17:26:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:10,284 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-01-31 17:26:10,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-01-31 17:26:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:26:10,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:10,285 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:10,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:26:10,285 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash -29138289, now seen corresponding path program 14 times [2022-01-31 17:26:10,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:10,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911482794] [2022-01-31 17:26:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:10,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:10,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:10,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:10,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:10,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:10,431 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 17:26:10,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:10,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911482794] [2022-01-31 17:26:10,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [911482794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:10,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:10,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:26:10,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094458858] [2022-01-31 17:26:10,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:10,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:26:10,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:10,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:26:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:26:10,432 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 17:26:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:10,694 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2022-01-31 17:26:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:26:10,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 87 [2022-01-31 17:26:10,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:10,695 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:26:10,695 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:26:10,696 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 17:26:10,696 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:10,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 43 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:26:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-01-31 17:26:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-01-31 17:26:10,703 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2022-01-31 17:26:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:10,703 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-01-31 17:26:10,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 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 17:26:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-01-31 17:26:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 17:26:10,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:10,704 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:10,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:26:10,704 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash 829016991, now seen corresponding path program 15 times [2022-01-31 17:26:10,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:10,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490083907] [2022-01-31 17:26:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:10,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:10,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:10,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:10,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:10,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:10,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:10,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490083907] [2022-01-31 17:26:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490083907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:10,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:10,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:26:10,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257814889] [2022-01-31 17:26:10,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:10,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:26:10,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:26:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:26:10,860 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:11,136 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2022-01-31 17:26:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:26:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 17:26:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:11,137 INFO L225 Difference]: With dead ends: 179 [2022-01-31 17:26:11,137 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:26:11,138 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 17:26:11,138 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:11,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 53 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:26:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-01-31 17:26:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 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 17:26:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-01-31 17:26:11,145 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2022-01-31 17:26:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:11,145 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-01-31 17:26:11,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-01-31 17:26:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:26:11,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:11,146 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:11,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:26:11,146 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1663698297, now seen corresponding path program 16 times [2022-01-31 17:26:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:11,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032115850] [2022-01-31 17:26:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:11,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:11,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:11,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:11,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:11,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032115850] [2022-01-31 17:26:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032115850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:11,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:11,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:26:11,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181646434] [2022-01-31 17:26:11,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:11,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:26:11,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:26:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:26:11,318 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 17:26:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:11,611 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2022-01-31 17:26:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:26:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 97 [2022-01-31 17:26:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:11,612 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:26:11,612 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:26:11,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:26:11,613 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 120 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:11,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 48 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:26:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-01-31 17:26:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-01-31 17:26:11,621 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2022-01-31 17:26:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:11,621 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-01-31 17:26:11,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 17:26:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-01-31 17:26:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 17:26:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:11,623 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:11,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:26:11,623 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2021757289, now seen corresponding path program 17 times [2022-01-31 17:26:11,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023538716] [2022-01-31 17:26:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:11,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:11,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:11,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:11,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:11,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:11,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:11,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023538716] [2022-01-31 17:26:11,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023538716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:11,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:11,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:26:11,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058658817] [2022-01-31 17:26:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:11,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:26:11,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:26:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:26:11,813 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:12,143 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2022-01-31 17:26:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:26:12,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 17:26:12,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:12,144 INFO L225 Difference]: With dead ends: 197 [2022-01-31 17:26:12,144 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:26:12,145 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 17:26:12,145 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:12,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 48 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:26:12,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-01-31 17:26:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 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 17:26:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-01-31 17:26:12,153 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 102 [2022-01-31 17:26:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:12,153 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-01-31 17:26:12,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-01-31 17:26:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:26:12,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:12,154 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:12,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:26:12,154 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash 117291647, now seen corresponding path program 18 times [2022-01-31 17:26:12,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:12,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30565958] [2022-01-31 17:26:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:12,156 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:12,156 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:12,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:12,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:12,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:12,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:12,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30565958] [2022-01-31 17:26:12,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30565958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:12,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:12,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:26:12,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955741356] [2022-01-31 17:26:12,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:12,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:26:12,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:26:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:26:12,350 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 17:26:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:12,692 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2022-01-31 17:26:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:26:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 107 [2022-01-31 17:26:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:12,693 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:26:12,693 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:26:12,693 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 17:26:12,694 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 206 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:12,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 33 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:26:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:26:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-01-31 17:26:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-01-31 17:26:12,702 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2022-01-31 17:26:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:12,702 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-01-31 17:26:12,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 17:26:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-01-31 17:26:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 17:26:12,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:12,703 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:12,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:26:12,703 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash -609257073, now seen corresponding path program 19 times [2022-01-31 17:26:12,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:12,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579274521] [2022-01-31 17:26:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:12,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:12,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:12,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:12,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:12,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:12,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:12,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579274521] [2022-01-31 17:26:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579274521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:12,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:12,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:26:12,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539576263] [2022-01-31 17:26:12,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:12,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:26:12,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:26:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:26:12,932 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:13,319 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2022-01-31 17:26:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:26:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 17:26:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:13,320 INFO L225 Difference]: With dead ends: 215 [2022-01-31 17:26:13,320 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 17:26:13,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:26:13,321 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:13,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 48 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 17:26:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-01-31 17:26:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 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 17:26:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-01-31 17:26:13,330 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 112 [2022-01-31 17:26:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-01-31 17:26:13,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-01-31 17:26:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:26:13,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:13,331 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:13,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:26:13,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1184539255, now seen corresponding path program 20 times [2022-01-31 17:26:13,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351602757] [2022-01-31 17:26:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:13,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:13,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:13,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:13,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:13,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:13,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:13,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351602757] [2022-01-31 17:26:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [351602757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:13,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:13,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:26:13,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223980126] [2022-01-31 17:26:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:13,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:26:13,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:26:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:26:13,554 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 17:26:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:13,962 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2022-01-31 17:26:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:26:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 117 [2022-01-31 17:26:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:13,965 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:26:13,965 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 17:26:13,966 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 17:26:13,966 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:13,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 48 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 17:26:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-01-31 17:26:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-01-31 17:26:13,976 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 117 [2022-01-31 17:26:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:13,976 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-01-31 17:26:13,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 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 17:26:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-01-31 17:26:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 17:26:13,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:13,976 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:13,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:26:13,977 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:13,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1966281593, now seen corresponding path program 21 times [2022-01-31 17:26:13,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:13,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192590129] [2022-01-31 17:26:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:13,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:13,979 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:13,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:13,980 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:14,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:14,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192590129] [2022-01-31 17:26:14,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1192590129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:14,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:14,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:26:14,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137873738] [2022-01-31 17:26:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:14,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:26:14,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:14,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:26:14,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:26:14,223 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:14,686 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2022-01-31 17:26:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:26:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 17:26:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:14,687 INFO L225 Difference]: With dead ends: 233 [2022-01-31 17:26:14,687 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:26:14,688 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 17:26:14,689 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 176 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:14,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 38 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:26:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2022-01-31 17:26:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 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 17:26:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-01-31 17:26:14,699 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 122 [2022-01-31 17:26:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:14,699 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-01-31 17:26:14,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-01-31 17:26:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:26:14,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:14,700 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:14,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:26:14,700 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:14,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash -745754001, now seen corresponding path program 22 times [2022-01-31 17:26:14,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:14,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608994321] [2022-01-31 17:26:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:14,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:14,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:14,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:14,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:14,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:14,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:14,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608994321] [2022-01-31 17:26:14,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608994321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:14,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:14,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:26:14,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689766745] [2022-01-31 17:26:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:14,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:26:14,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:26:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:26:14,940 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 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 17:26:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:15,375 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2022-01-31 17:26:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:26:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 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 127 [2022-01-31 17:26:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:15,376 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:26:15,376 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:26:15,377 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 17:26:15,377 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:15,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 48 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:26:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-01-31 17:26:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-01-31 17:26:15,388 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 127 [2022-01-31 17:26:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:15,388 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-01-31 17:26:15,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 25 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 17:26:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-01-31 17:26:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 17:26:15,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:15,389 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:15,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:26:15,389 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1940309887, now seen corresponding path program 23 times [2022-01-31 17:26:15,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:15,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577889675] [2022-01-31 17:26:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:15,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:15,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:15,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:15,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:15,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:15,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577889675] [2022-01-31 17:26:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [577889675] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:15,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:15,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:26:15,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011243424] [2022-01-31 17:26:15,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:15,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:26:15,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:26:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:26:15,656 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:16,115 INFO L93 Difference]: Finished difference Result 251 states and 259 transitions. [2022-01-31 17:26:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:26:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-01-31 17:26:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:16,118 INFO L225 Difference]: With dead ends: 251 [2022-01-31 17:26:16,119 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:26:16,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:26:16,121 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:16,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 43 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:26:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-01-31 17:26:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 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 17:26:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-01-31 17:26:16,141 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 132 [2022-01-31 17:26:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:16,142 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-01-31 17:26:16,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-01-31 17:26:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:26:16,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:16,143 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:16,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:26:16,143 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 330558055, now seen corresponding path program 24 times [2022-01-31 17:26:16,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215518900] [2022-01-31 17:26:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:16,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:16,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:16,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:16,146 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:16,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:16,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:16,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215518900] [2022-01-31 17:26:16,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [215518900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:16,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:16,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:26:16,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694216981] [2022-01-31 17:26:16,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:16,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:26:16,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:26:16,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:26:16,438 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 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 17:26:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:16,935 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2022-01-31 17:26:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:26:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 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 137 [2022-01-31 17:26:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:16,936 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:26:16,936 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:26:16,937 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 17:26:16,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:16,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 48 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:26:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-01-31 17:26:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.0283687943262412) internal successors, (145), 141 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-01-31 17:26:16,953 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 137 [2022-01-31 17:26:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:16,953 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-01-31 17:26:16,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 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 17:26:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-01-31 17:26:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 17:26:16,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:16,954 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:16,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:26:16,954 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1997343351, now seen corresponding path program 25 times [2022-01-31 17:26:16,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56840275] [2022-01-31 17:26:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:16,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:16,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:16,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:16,958 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:17,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:17,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:17,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56840275] [2022-01-31 17:26:17,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [56840275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:17,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:17,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:26:17,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164923456] [2022-01-31 17:26:17,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:17,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:26:17,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:26:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:26:17,255 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:17,763 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2022-01-31 17:26:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:26:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 17:26:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:17,763 INFO L225 Difference]: With dead ends: 269 [2022-01-31 17:26:17,764 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:26:17,764 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 17:26:17,765 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 256 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:17,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 33 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:26:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-01-31 17:26:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 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 17:26:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-01-31 17:26:17,780 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 142 [2022-01-31 17:26:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:17,780 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-01-31 17:26:17,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-01-31 17:26:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:26:17,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:17,781 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:17,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:26:17,781 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash -621786529, now seen corresponding path program 26 times [2022-01-31 17:26:17,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354077904] [2022-01-31 17:26:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:17,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:17,783 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:17,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:17,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:18,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354077904] [2022-01-31 17:26:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354077904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:18,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:18,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:26:18,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721065604] [2022-01-31 17:26:18,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:26:18,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:26:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:26:18,067 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 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 17:26:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:18,605 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2022-01-31 17:26:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:26:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 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 147 [2022-01-31 17:26:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:18,606 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:26:18,606 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:26:18,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:26:18,608 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 224 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:18,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 53 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:26:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-01-31 17:26:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-01-31 17:26:18,620 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 147 [2022-01-31 17:26:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:18,620 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-01-31 17:26:18,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 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 17:26:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-01-31 17:26:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 17:26:18,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:18,622 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:18,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:26:18,622 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash -137382545, now seen corresponding path program 27 times [2022-01-31 17:26:18,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:18,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908980748] [2022-01-31 17:26:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:18,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:18,623 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:18,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:18,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:18,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:18,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908980748] [2022-01-31 17:26:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1908980748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:18,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:18,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:26:18,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460351361] [2022-01-31 17:26:18,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:18,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:26:18,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:26:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:26:18,961 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:19,492 INFO L93 Difference]: Finished difference Result 287 states and 295 transitions. [2022-01-31 17:26:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:26:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 17:26:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:19,493 INFO L225 Difference]: With dead ends: 287 [2022-01-31 17:26:19,493 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 17:26:19,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:26:19,495 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 230 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:19,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 43 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 17:26:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2022-01-31 17:26:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 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 17:26:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-01-31 17:26:19,507 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2022-01-31 17:26:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:19,508 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-01-31 17:26:19,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-01-31 17:26:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:26:19,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:19,508 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:19,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:26:19,509 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -350105001, now seen corresponding path program 28 times [2022-01-31 17:26:19,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:19,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741153686] [2022-01-31 17:26:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:19,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:19,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:19,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:19,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:19,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741153686] [2022-01-31 17:26:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [741153686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:19,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:19,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:26:19,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544639360] [2022-01-31 17:26:19,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:19,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:26:19,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:26:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:26:19,882 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 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 17:26:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:20,461 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2022-01-31 17:26:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:26:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 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 157 [2022-01-31 17:26:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:20,462 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:26:20,462 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 17:26:20,463 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 17:26:20,463 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 250 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:20,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 48 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 17:26:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2022-01-31 17:26:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-01-31 17:26:20,477 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 157 [2022-01-31 17:26:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:20,477 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-01-31 17:26:20,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 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 17:26:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-01-31 17:26:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 17:26:20,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:20,478 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:20,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:26:20,478 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1522452583, now seen corresponding path program 29 times [2022-01-31 17:26:20,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:20,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970572399] [2022-01-31 17:26:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:20,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:20,479 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:20,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:20,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:20,837 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 17:26:20,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970572399] [2022-01-31 17:26:20,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [970572399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:20,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:20,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:26:20,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227889745] [2022-01-31 17:26:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:20,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:26:20,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:26:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:26:20,838 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:21,482 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2022-01-31 17:26:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:26:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 17:26:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:21,483 INFO L225 Difference]: With dead ends: 305 [2022-01-31 17:26:21,483 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:26:21,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:26:21,484 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 332 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:21,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 38 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:26:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-01-31 17:26:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 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 17:26:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-01-31 17:26:21,498 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 162 [2022-01-31 17:26:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:21,498 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-01-31 17:26:21,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-01-31 17:26:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:26:21,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:21,498 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:21,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:26:21,499 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:21,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1948811855, now seen corresponding path program 30 times [2022-01-31 17:26:21,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:21,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000814634] [2022-01-31 17:26:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:21,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:21,500 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:21,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:21,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:21,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:21,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000814634] [2022-01-31 17:26:21,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000814634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:21,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:21,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:26:21,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109499130] [2022-01-31 17:26:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:21,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:26:21,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:26:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:26:21,880 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 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 17:26:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:22,564 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2022-01-31 17:26:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:26:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 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 167 [2022-01-31 17:26:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:22,565 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:26:22,566 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:26:22,567 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 17:26:22,567 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 266 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:22,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 43 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:26:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-01-31 17:26:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-01-31 17:26:22,606 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 167 [2022-01-31 17:26:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:22,607 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-01-31 17:26:22,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 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 17:26:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-01-31 17:26:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 17:26:22,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:22,607 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:22,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:26:22,608 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2035661985, now seen corresponding path program 31 times [2022-01-31 17:26:22,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:22,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423715708] [2022-01-31 17:26:22,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:22,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:22,609 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:22,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:22,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:23,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:23,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423715708] [2022-01-31 17:26:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423715708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:23,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:23,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:26:23,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091087706] [2022-01-31 17:26:23,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:23,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:26:23,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:26:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:26:23,027 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:23,677 INFO L93 Difference]: Finished difference Result 323 states and 331 transitions. [2022-01-31 17:26:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:26:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 17:26:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:23,678 INFO L225 Difference]: With dead ends: 323 [2022-01-31 17:26:23,678 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:26:23,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:26:23,680 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 236 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:23,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 48 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:26:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-01-31 17:26:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 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 17:26:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2022-01-31 17:26:23,706 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 172 [2022-01-31 17:26:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2022-01-31 17:26:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2022-01-31 17:26:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:26:23,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:23,706 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:23,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:26:23,707 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1813751225, now seen corresponding path program 32 times [2022-01-31 17:26:23,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:23,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853174640] [2022-01-31 17:26:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:23,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:23,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:23,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:23,712 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:24,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:24,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853174640] [2022-01-31 17:26:24,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [853174640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:24,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:24,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:26:24,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630192901] [2022-01-31 17:26:24,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:24,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:26:24,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:26:24,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:26:24,136 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 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 17:26:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:24,835 INFO L93 Difference]: Finished difference Result 332 states and 340 transitions. [2022-01-31 17:26:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:26:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 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 177 [2022-01-31 17:26:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:24,836 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:26:24,836 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:26:24,837 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 17:26:24,837 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 53 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:26:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2022-01-31 17:26:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.022099447513812) internal successors, (185), 181 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-01-31 17:26:24,853 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 177 [2022-01-31 17:26:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:24,853 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-01-31 17:26:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 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 17:26:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-01-31 17:26:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 17:26:24,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:24,854 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:24,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:26:24,854 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1684153943, now seen corresponding path program 33 times [2022-01-31 17:26:24,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:24,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343284508] [2022-01-31 17:26:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:24,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:24,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:24,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:24,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:25,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:25,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:25,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343284508] [2022-01-31 17:26:25,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343284508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:25,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:25,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:26:25,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556304352] [2022-01-31 17:26:25,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:25,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:26:25,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:26:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:26:25,302 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:26,010 INFO L93 Difference]: Finished difference Result 341 states and 349 transitions. [2022-01-31 17:26:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:26:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 17:26:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:26,011 INFO L225 Difference]: With dead ends: 341 [2022-01-31 17:26:26,011 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 17:26:26,012 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 17:26:26,012 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 296 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:26,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 38 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 17:26:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2022-01-31 17:26:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 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 17:26:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2022-01-31 17:26:26,029 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 182 [2022-01-31 17:26:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:26,029 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2022-01-31 17:26:26,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 36 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2022-01-31 17:26:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:26:26,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:26,030 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:26,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:26:26,030 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash -701146561, now seen corresponding path program 34 times [2022-01-31 17:26:26,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:26,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659559443] [2022-01-31 17:26:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:26,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:26,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:26,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:26,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:26,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:26,515 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:26,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659559443] [2022-01-31 17:26:26,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659559443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:26,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:26,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:26:26,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922534273] [2022-01-31 17:26:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:26,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:26:26,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:26:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:26:26,516 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 37 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 17:26:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:27,310 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2022-01-31 17:26:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:26:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 37 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 187 [2022-01-31 17:26:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:27,311 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:26:27,311 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:26:27,312 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 17:26:27,313 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 292 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:27,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 58 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:26:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2022-01-31 17:26:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 191 states have (on average 1.0209424083769634) internal successors, (195), 191 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2022-01-31 17:26:27,330 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 187 [2022-01-31 17:26:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:27,330 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2022-01-31 17:26:27,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 37 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 17:26:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2022-01-31 17:26:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 17:26:27,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:27,331 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:27,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:26:27,331 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1589014863, now seen corresponding path program 35 times [2022-01-31 17:26:27,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447368509] [2022-01-31 17:26:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:27,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:27,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:27,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:27,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:27,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:27,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447368509] [2022-01-31 17:26:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [447368509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:27,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:27,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:26:27,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830838465] [2022-01-31 17:26:27,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:27,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:26:27,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:26:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:26:27,801 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 38 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:28,582 INFO L93 Difference]: Finished difference Result 359 states and 367 transitions. [2022-01-31 17:26:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:26:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 38 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-01-31 17:26:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:28,583 INFO L225 Difference]: With dead ends: 359 [2022-01-31 17:26:28,583 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 17:26:28,584 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 17:26:28,584 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 312 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:28,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 38 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 17:26:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-01-31 17:26:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 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 17:26:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2022-01-31 17:26:28,603 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 192 [2022-01-31 17:26:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:28,603 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2022-01-31 17:26:28,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 38 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2022-01-31 17:26:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:26:28,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:28,604 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:28,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:26:28,604 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:28,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1258585545, now seen corresponding path program 36 times [2022-01-31 17:26:28,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:28,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895352915] [2022-01-31 17:26:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:28,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:28,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:28,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:28,608 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:29,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:29,167 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:29,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895352915] [2022-01-31 17:26:29,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [895352915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:29,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:29,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:26:29,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007749286] [2022-01-31 17:26:29,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:29,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:26:29,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:26:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:26:29,168 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand has 40 states, 40 states have (on average 1.325) internal successors, (53), 39 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 17:26:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:29,967 INFO L93 Difference]: Finished difference Result 368 states and 376 transitions. [2022-01-31 17:26:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:26:29,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 39 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 197 [2022-01-31 17:26:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:29,968 INFO L225 Difference]: With dead ends: 368 [2022-01-31 17:26:29,968 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:26:29,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:26:29,969 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 310 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:29,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 53 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:26:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-01-31 17:26:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 201 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-01-31 17:26:29,988 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 197 [2022-01-31 17:26:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:29,988 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-01-31 17:26:29,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 39 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 17:26:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-01-31 17:26:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 17:26:29,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:29,989 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:29,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:26:29,989 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -495508409, now seen corresponding path program 37 times [2022-01-31 17:26:29,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:29,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31994720] [2022-01-31 17:26:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:29,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:29,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:29,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:29,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:30,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:30,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:30,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31994720] [2022-01-31 17:26:30,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [31994720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:30,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:30,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:26:30,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494548817] [2022-01-31 17:26:30,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:30,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:26:30,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:26:30,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:26:30,528 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 41 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 40 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:31,361 INFO L93 Difference]: Finished difference Result 377 states and 385 transitions. [2022-01-31 17:26:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:26:31,363 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 40 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 17:26:31,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:31,364 INFO L225 Difference]: With dead ends: 377 [2022-01-31 17:26:31,364 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 17:26:31,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:26:31,366 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 346 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:31,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 38 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 17:26:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-01-31 17:26:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 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 17:26:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2022-01-31 17:26:31,386 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 202 [2022-01-31 17:26:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:31,387 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2022-01-31 17:26:31,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 40 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2022-01-31 17:26:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:26:31,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:31,388 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:26:31,388 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash 404148783, now seen corresponding path program 38 times [2022-01-31 17:26:31,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965412457] [2022-01-31 17:26:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:31,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:31,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:31,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:31,392 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:31,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:31,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965412457] [2022-01-31 17:26:31,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [965412457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:31,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:31,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:26:31,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464313827] [2022-01-31 17:26:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:31,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:26:31,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:26:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:26:31,933 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 41 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 17:26:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:32,817 INFO L93 Difference]: Finished difference Result 386 states and 394 transitions. [2022-01-31 17:26:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:26:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 41 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 207 [2022-01-31 17:26:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:32,819 INFO L225 Difference]: With dead ends: 386 [2022-01-31 17:26:32,819 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:26:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:26:32,820 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 344 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:32,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 48 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:26:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2022-01-31 17:26:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2022-01-31 17:26:32,843 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 207 [2022-01-31 17:26:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:32,843 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2022-01-31 17:26:32,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 41 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 17:26:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2022-01-31 17:26:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 17:26:32,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:32,844 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:32,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:26:32,844 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash -562806977, now seen corresponding path program 39 times [2022-01-31 17:26:32,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009826196] [2022-01-31 17:26:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:32,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:32,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:32,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:32,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:33,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:33,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009826196] [2022-01-31 17:26:33,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009826196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:33,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:33,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:26:33,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260691987] [2022-01-31 17:26:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:26:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:26:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:26:33,555 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 42 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:34,498 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2022-01-31 17:26:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:26:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 42 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-01-31 17:26:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:34,499 INFO L225 Difference]: With dead ends: 395 [2022-01-31 17:26:34,499 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 17:26:34,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:26:34,500 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 346 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:34,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 48 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 17:26:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2022-01-31 17:26:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 216 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 17:26:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2022-01-31 17:26:34,523 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 212 [2022-01-31 17:26:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:34,523 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2022-01-31 17:26:34,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 42 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2022-01-31 17:26:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:26:34,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:34,524 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:34,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:26:34,524 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -714651097, now seen corresponding path program 40 times [2022-01-31 17:26:34,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505777606] [2022-01-31 17:26:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:34,525 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:34,525 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:34,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:34,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:35,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:35,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:35,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505777606] [2022-01-31 17:26:35,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [505777606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:35,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:35,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:26:35,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809784701] [2022-01-31 17:26:35,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:26:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:26:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:26:35,222 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 43 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 17:26:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:36,179 INFO L93 Difference]: Finished difference Result 404 states and 412 transitions. [2022-01-31 17:26:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:26:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 43 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 217 [2022-01-31 17:26:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:36,180 INFO L225 Difference]: With dead ends: 404 [2022-01-31 17:26:36,180 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 17:26:36,180 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 17:26:36,181 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 304 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:36,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 58 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 17:26:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2022-01-31 17:26:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.0180995475113122) internal successors, (225), 221 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2022-01-31 17:26:36,204 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 217 [2022-01-31 17:26:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:36,204 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2022-01-31 17:26:36,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 43 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 17:26:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2022-01-31 17:26:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 17:26:36,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:36,205 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:36,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:26:36,205 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1132315191, now seen corresponding path program 41 times [2022-01-31 17:26:36,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296996903] [2022-01-31 17:26:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:36,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:36,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:36,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:36,209 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:36,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:36,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:36,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296996903] [2022-01-31 17:26:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [296996903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:36,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:36,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:26:36,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765461946] [2022-01-31 17:26:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:26:36,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:26:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:26:36,838 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 44 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:37,831 INFO L93 Difference]: Finished difference Result 413 states and 421 transitions. [2022-01-31 17:26:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:26:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 44 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 17:26:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:37,834 INFO L225 Difference]: With dead ends: 413 [2022-01-31 17:26:37,834 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 17:26:37,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:26:37,835 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 496 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:37,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 33 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 17:26:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2022-01-31 17:26:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 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 17:26:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2022-01-31 17:26:37,860 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 222 [2022-01-31 17:26:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2022-01-31 17:26:37,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 44 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2022-01-31 17:26:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:26:37,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:37,861 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:37,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:26:37,861 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 818735647, now seen corresponding path program 42 times [2022-01-31 17:26:37,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889428661] [2022-01-31 17:26:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:37,863 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:37,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:37,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:37,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:38,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:38,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889428661] [2022-01-31 17:26:38,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1889428661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:38,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:38,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:26:38,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977314266] [2022-01-31 17:26:38,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:38,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:26:38,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:26:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:26:38,496 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 45 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 17:26:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:39,548 INFO L93 Difference]: Finished difference Result 422 states and 430 transitions. [2022-01-31 17:26:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:26:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 45 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 227 [2022-01-31 17:26:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:39,550 INFO L225 Difference]: With dead ends: 422 [2022-01-31 17:26:39,550 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:26:39,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:26:39,551 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 518 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 38 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:26:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2022-01-31 17:26:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 231 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2022-01-31 17:26:39,586 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 227 [2022-01-31 17:26:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:39,586 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2022-01-31 17:26:39,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 45 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 17:26:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2022-01-31 17:26:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 17:26:39,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:39,587 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:39,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:26:39,587 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:39,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2073842385, now seen corresponding path program 43 times [2022-01-31 17:26:39,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:39,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966005557] [2022-01-31 17:26:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:39,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:39,588 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:39,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:39,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:40,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:40,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:40,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966005557] [2022-01-31 17:26:40,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1966005557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:40,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:26:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727480622] [2022-01-31 17:26:40,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:26:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:26:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:26:40,236 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 46 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:41,315 INFO L93 Difference]: Finished difference Result 431 states and 439 transitions. [2022-01-31 17:26:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:26:41,315 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 46 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2022-01-31 17:26:41,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:41,316 INFO L225 Difference]: With dead ends: 431 [2022-01-31 17:26:41,316 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 17:26:41,316 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 17:26:41,317 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 486 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:41,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 43 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 17:26:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2022-01-31 17:26:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 236 states have (on average 1.0169491525423728) internal successors, (240), 236 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 17:26:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 245 transitions. [2022-01-31 17:26:41,343 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 245 transitions. Word has length 232 [2022-01-31 17:26:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:41,343 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 245 transitions. [2022-01-31 17:26:41,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 46 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 245 transitions. [2022-01-31 17:26:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:26:41,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:41,344 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:41,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:26:41,344 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1546105367, now seen corresponding path program 44 times [2022-01-31 17:26:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592075940] [2022-01-31 17:26:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:41,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:41,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:41,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:41,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:42,029 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592075940] [2022-01-31 17:26:42,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592075940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:42,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:42,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:26:42,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149003551] [2022-01-31 17:26:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:42,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:26:42,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:26:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:26:42,030 INFO L87 Difference]: Start difference. First operand 242 states and 245 transitions. Second operand has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 47 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 17:26:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:43,135 INFO L93 Difference]: Finished difference Result 440 states and 448 transitions. [2022-01-31 17:26:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:26:43,136 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 47 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 237 [2022-01-31 17:26:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:43,136 INFO L225 Difference]: With dead ends: 440 [2022-01-31 17:26:43,136 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 17:26:43,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:26:43,137 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 352 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:43,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 53 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 17:26:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2022-01-31 17:26:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.016597510373444) internal successors, (245), 241 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 250 transitions. [2022-01-31 17:26:43,166 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 250 transitions. Word has length 237 [2022-01-31 17:26:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:43,166 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 250 transitions. [2022-01-31 17:26:43,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 47 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 17:26:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 250 transitions. [2022-01-31 17:26:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 17:26:43,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:43,167 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:43,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:26:43,168 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 368443431, now seen corresponding path program 45 times [2022-01-31 17:26:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156370566] [2022-01-31 17:26:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:43,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:43,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:43,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:43,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:43,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:43,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:43,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156370566] [2022-01-31 17:26:43,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156370566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:43,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:43,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:26:43,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456177153] [2022-01-31 17:26:43,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:43,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:26:43,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:26:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:26:43,906 INFO L87 Difference]: Start difference. First operand 247 states and 250 transitions. Second operand has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 48 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:45,044 INFO L93 Difference]: Finished difference Result 449 states and 457 transitions. [2022-01-31 17:26:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:26:45,044 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 48 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-01-31 17:26:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:45,045 INFO L225 Difference]: With dead ends: 449 [2022-01-31 17:26:45,045 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 17:26:45,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:26:45,047 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 522 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:45,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 38 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 17:26:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2022-01-31 17:26:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.016260162601626) internal successors, (250), 246 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 17:26:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2022-01-31 17:26:45,084 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 242 [2022-01-31 17:26:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:45,084 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2022-01-31 17:26:45,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 48 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2022-01-31 17:26:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:26:45,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:45,085 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:45,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:26:45,086 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -145251825, now seen corresponding path program 46 times [2022-01-31 17:26:45,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598754236] [2022-01-31 17:26:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:45,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:45,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:45,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:45,091 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:45,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:45,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:45,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598754236] [2022-01-31 17:26:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598754236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:45,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:45,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:26:45,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342921992] [2022-01-31 17:26:45,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:45,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:26:45,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:26:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:26:45,833 INFO L87 Difference]: Start difference. First operand 252 states and 255 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 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 17:26:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:47,033 INFO L93 Difference]: Finished difference Result 458 states and 466 transitions. [2022-01-31 17:26:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:26:47,033 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 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 247 [2022-01-31 17:26:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:47,034 INFO L225 Difference]: With dead ends: 458 [2022-01-31 17:26:47,034 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 17:26:47,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:26:47,037 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 462 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:47,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 63 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 17:26:47,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2022-01-31 17:26:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 251 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 260 transitions. [2022-01-31 17:26:47,068 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 260 transitions. Word has length 247 [2022-01-31 17:26:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:47,068 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 260 transitions. [2022-01-31 17:26:47,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 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 17:26:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 260 transitions. [2022-01-31 17:26:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-31 17:26:47,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:47,069 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:47,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:26:47,069 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -284902625, now seen corresponding path program 47 times [2022-01-31 17:26:47,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:47,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618404284] [2022-01-31 17:26:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:47,070 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:47,070 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:47,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:47,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:47,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618404284] [2022-01-31 17:26:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618404284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:47,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:47,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:26:47,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835982424] [2022-01-31 17:26:47,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:47,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:26:47,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:26:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:26:47,848 INFO L87 Difference]: Start difference. First operand 257 states and 260 transitions. Second operand has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 50 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:49,076 INFO L93 Difference]: Finished difference Result 467 states and 475 transitions. [2022-01-31 17:26:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:26:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 50 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2022-01-31 17:26:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:49,078 INFO L225 Difference]: With dead ends: 467 [2022-01-31 17:26:49,078 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:26:49,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:26:49,079 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 440 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:49,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 48 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:26:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2022-01-31 17:26:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.015625) internal successors, (260), 256 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 17:26:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 265 transitions. [2022-01-31 17:26:49,109 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 265 transitions. Word has length 252 [2022-01-31 17:26:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:49,110 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 265 transitions. [2022-01-31 17:26:49,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 50 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 265 transitions. [2022-01-31 17:26:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:26:49,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:49,111 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:49,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:26:49,111 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1875068409, now seen corresponding path program 48 times [2022-01-31 17:26:49,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128126022] [2022-01-31 17:26:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:49,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:49,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:49,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:49,122 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:49,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:49,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128126022] [2022-01-31 17:26:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [128126022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:49,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:26:49,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89105539] [2022-01-31 17:26:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:49,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:26:49,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:26:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:26:49,897 INFO L87 Difference]: Start difference. First operand 262 states and 265 transitions. Second operand has 52 states, 52 states have (on average 1.25) internal successors, (65), 51 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 17:26:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:51,201 INFO L93 Difference]: Finished difference Result 476 states and 484 transitions. [2022-01-31 17:26:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:26:51,201 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.25) internal successors, (65), 51 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 257 [2022-01-31 17:26:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:51,202 INFO L225 Difference]: With dead ends: 476 [2022-01-31 17:26:51,202 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:26:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:26:51,203 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 460 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:51,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 43 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:26:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2022-01-31 17:26:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 261 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2022-01-31 17:26:51,234 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 257 [2022-01-31 17:26:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:51,235 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2022-01-31 17:26:51,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.25) internal successors, (65), 51 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 17:26:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2022-01-31 17:26:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 17:26:51,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:51,236 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:51,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:26:51,236 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 140500503, now seen corresponding path program 49 times [2022-01-31 17:26:51,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:51,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628256351] [2022-01-31 17:26:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:51,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:51,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:51,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:51,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:52,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:52,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628256351] [2022-01-31 17:26:52,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628256351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:52,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:52,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:26:52,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695162180] [2022-01-31 17:26:52,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:52,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:26:52,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:26:52,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:26:52,056 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 52 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:53,363 INFO L93 Difference]: Finished difference Result 485 states and 493 transitions. [2022-01-31 17:26:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:26:53,364 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 52 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 17:26:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:53,365 INFO L225 Difference]: With dead ends: 485 [2022-01-31 17:26:53,365 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 17:26:53,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:26:53,366 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 524 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:53,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 38 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:53,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 17:26:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2022-01-31 17:26:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 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 17:26:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 275 transitions. [2022-01-31 17:26:53,407 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 275 transitions. Word has length 262 [2022-01-31 17:26:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:53,407 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 275 transitions. [2022-01-31 17:26:53,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 52 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 275 transitions. [2022-01-31 17:26:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:26:53,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:53,409 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:53,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:26:53,409 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 582416895, now seen corresponding path program 50 times [2022-01-31 17:26:53,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:53,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846302576] [2022-01-31 17:26:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:53,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:53,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:53,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:53,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:54,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:54,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846302576] [2022-01-31 17:26:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846302576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:54,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:54,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:26:54,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212649499] [2022-01-31 17:26:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:54,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:26:54,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:26:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:26:54,254 INFO L87 Difference]: Start difference. First operand 272 states and 275 transitions. Second operand has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 53 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 17:26:55,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:55,653 INFO L93 Difference]: Finished difference Result 494 states and 502 transitions. [2022-01-31 17:26:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:26:55,653 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 53 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 267 [2022-01-31 17:26:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:55,654 INFO L225 Difference]: With dead ends: 494 [2022-01-31 17:26:55,654 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:26:55,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:26:55,655 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 512 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:55,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 38 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:26:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2022-01-31 17:26:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 280 transitions. [2022-01-31 17:26:55,690 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 280 transitions. Word has length 267 [2022-01-31 17:26:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:55,690 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 280 transitions. [2022-01-31 17:26:55,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 53 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 17:26:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 280 transitions. [2022-01-31 17:26:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-31 17:26:55,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:55,691 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:55,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:26:55,691 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -589862641, now seen corresponding path program 51 times [2022-01-31 17:26:55,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775637137] [2022-01-31 17:26:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:55,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:55,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:55,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:55,696 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:56,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775637137] [2022-01-31 17:26:56,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1775637137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:56,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:56,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:26:56,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314322470] [2022-01-31 17:26:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:56,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:26:56,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:26:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:26:56,593 INFO L87 Difference]: Start difference. First operand 277 states and 280 transitions. Second operand has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 54 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:58,019 INFO L93 Difference]: Finished difference Result 503 states and 511 transitions. [2022-01-31 17:26:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:26:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 54 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2022-01-31 17:26:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:58,020 INFO L225 Difference]: With dead ends: 503 [2022-01-31 17:26:58,020 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 17:26:58,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:26:58,021 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 546 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:58,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 38 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 17:26:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2022-01-31 17:26:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 276 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 17:26:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 285 transitions. [2022-01-31 17:26:58,058 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 285 transitions. Word has length 272 [2022-01-31 17:26:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:58,058 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 285 transitions. [2022-01-31 17:26:58,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 54 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 285 transitions. [2022-01-31 17:26:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:26:58,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:58,059 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:58,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:26:58,059 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1733926409, now seen corresponding path program 52 times [2022-01-31 17:26:58,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:58,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200005609] [2022-01-31 17:26:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:58,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:58,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:58,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:58,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:59,013 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 17:26:59,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200005609] [2022-01-31 17:26:59,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200005609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:59,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:59,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:26:59,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73424548] [2022-01-31 17:26:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:59,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:26:59,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:26:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:26:59,014 INFO L87 Difference]: Start difference. First operand 282 states and 285 transitions. Second operand has 56 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 55 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 17:27:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:00,437 INFO L93 Difference]: Finished difference Result 512 states and 520 transitions. [2022-01-31 17:27:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:27:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 55 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 277 [2022-01-31 17:27:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:00,438 INFO L225 Difference]: With dead ends: 512 [2022-01-31 17:27:00,438 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 17:27:00,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:27:00,439 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 482 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:00,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 38 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 17:27:00,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2022-01-31 17:27:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.0142348754448398) internal successors, (285), 281 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 290 transitions. [2022-01-31 17:27:00,476 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 290 transitions. Word has length 277 [2022-01-31 17:27:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:00,476 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 290 transitions. [2022-01-31 17:27:00,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 55 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 17:27:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 290 transitions. [2022-01-31 17:27:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 17:27:00,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:00,477 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:00,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:27:00,477 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:00,477 INFO L85 PathProgramCache]: Analyzing trace with hash -381985785, now seen corresponding path program 53 times [2022-01-31 17:27:00,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:00,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689650216] [2022-01-31 17:27:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:00,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:00,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:00,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:00,483 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:01,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:01,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689650216] [2022-01-31 17:27:01,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689650216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:01,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:01,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:27:01,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495360685] [2022-01-31 17:27:01,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:01,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:27:01,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:27:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:27:01,447 INFO L87 Difference]: Start difference. First operand 287 states and 290 transitions. Second operand has 57 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:02,943 INFO L93 Difference]: Finished difference Result 521 states and 529 transitions. [2022-01-31 17:27:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:27:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2022-01-31 17:27:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:02,944 INFO L225 Difference]: With dead ends: 521 [2022-01-31 17:27:02,944 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 17:27:02,945 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 17:27:02,945 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 572 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:02,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 38 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 17:27:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2022-01-31 17:27:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.013986013986014) internal successors, (290), 286 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 17:27:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 295 transitions. [2022-01-31 17:27:02,983 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 295 transitions. Word has length 282 [2022-01-31 17:27:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:02,983 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 295 transitions. [2022-01-31 17:27:02,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 295 transitions. [2022-01-31 17:27:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:27:02,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:02,984 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:02,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:27:02,984 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1240134127, now seen corresponding path program 54 times [2022-01-31 17:27:02,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:02,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373318985] [2022-01-31 17:27:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:02,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:02,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:02,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:02,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:03,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:03,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373318985] [2022-01-31 17:27:03,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [373318985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:03,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:03,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:27:03,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658016981] [2022-01-31 17:27:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:03,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:27:03,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:27:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:27:03,962 INFO L87 Difference]: Start difference. First operand 292 states and 295 transitions. Second operand has 58 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 57 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 17:27:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:05,577 INFO L93 Difference]: Finished difference Result 530 states and 538 transitions. [2022-01-31 17:27:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:27:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 57 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 287 [2022-01-31 17:27:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:05,578 INFO L225 Difference]: With dead ends: 530 [2022-01-31 17:27:05,578 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:27:05,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:27:05,579 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 630 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:05,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 38 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:27:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-01-31 17:27:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.013745704467354) internal successors, (295), 291 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 300 transitions. [2022-01-31 17:27:05,618 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 300 transitions. Word has length 287 [2022-01-31 17:27:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 300 transitions. [2022-01-31 17:27:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 57 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 17:27:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 300 transitions. [2022-01-31 17:27:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-01-31 17:27:05,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:05,619 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:27:05,619 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 744208127, now seen corresponding path program 55 times [2022-01-31 17:27:05,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124929531] [2022-01-31 17:27:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:05,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:05,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:05,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:05,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:06,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:06,666 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124929531] [2022-01-31 17:27:06,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124929531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:06,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:06,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:27:06,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39840034] [2022-01-31 17:27:06,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:06,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:27:06,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:06,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:27:06,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:27:06,667 INFO L87 Difference]: Start difference. First operand 297 states and 300 transitions. Second operand has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 58 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:08,296 INFO L93 Difference]: Finished difference Result 539 states and 547 transitions. [2022-01-31 17:27:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:27:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 58 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-01-31 17:27:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:08,297 INFO L225 Difference]: With dead ends: 539 [2022-01-31 17:27:08,297 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:27:08,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:27:08,299 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 510 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:08,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 63 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:27:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2022-01-31 17:27:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 296 states have (on average 1.0135135135135136) internal successors, (300), 296 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 17:27:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 305 transitions. [2022-01-31 17:27:08,340 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 305 transitions. Word has length 292 [2022-01-31 17:27:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:08,340 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 305 transitions. [2022-01-31 17:27:08,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 58 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 305 transitions. [2022-01-31 17:27:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:27:08,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:08,341 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:08,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:27:08,342 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2086971879, now seen corresponding path program 56 times [2022-01-31 17:27:08,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:08,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108957477] [2022-01-31 17:27:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:08,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:08,343 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:08,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:08,348 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:09,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:09,403 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 17:27:09,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:09,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108957477] [2022-01-31 17:27:09,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [108957477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:09,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:09,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:27:09,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789079128] [2022-01-31 17:27:09,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:09,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:27:09,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:27:09,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:27:09,405 INFO L87 Difference]: Start difference. First operand 302 states and 305 transitions. Second operand has 60 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 59 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 17:27:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:11,055 INFO L93 Difference]: Finished difference Result 548 states and 556 transitions. [2022-01-31 17:27:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:27:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 59 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 297 [2022-01-31 17:27:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:11,056 INFO L225 Difference]: With dead ends: 548 [2022-01-31 17:27:11,056 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 17:27:11,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:27:11,057 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 580 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:11,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 38 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 17:27:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 307. [2022-01-31 17:27:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.0132890365448506) internal successors, (305), 301 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 310 transitions. [2022-01-31 17:27:11,098 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 310 transitions. Word has length 297 [2022-01-31 17:27:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:11,098 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 310 transitions. [2022-01-31 17:27:11,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 59 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 17:27:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 310 transitions. [2022-01-31 17:27:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 17:27:11,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:11,100 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:11,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:27:11,100 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1492616713, now seen corresponding path program 57 times [2022-01-31 17:27:11,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119833925] [2022-01-31 17:27:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:11,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:11,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:11,106 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:12,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:12,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119833925] [2022-01-31 17:27:12,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119833925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:12,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:12,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:27:12,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380955875] [2022-01-31 17:27:12,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:12,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:27:12,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:27:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:27:12,249 INFO L87 Difference]: Start difference. First operand 307 states and 310 transitions. Second operand has 61 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 60 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:13,952 INFO L93 Difference]: Finished difference Result 557 states and 565 transitions. [2022-01-31 17:27:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:27:13,953 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 60 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 17:27:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:13,954 INFO L225 Difference]: With dead ends: 557 [2022-01-31 17:27:13,954 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 17:27:13,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:27:13,955 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 544 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:13,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 53 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 17:27:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2022-01-31 17:27:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0130718954248366) internal successors, (310), 306 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 17:27:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2022-01-31 17:27:13,998 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 302 [2022-01-31 17:27:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:13,998 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2022-01-31 17:27:13,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 60 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2022-01-31 17:27:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:27:13,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:13,999 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:27:13,999 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash -470578721, now seen corresponding path program 58 times [2022-01-31 17:27:13,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216307233] [2022-01-31 17:27:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:14,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:14,000 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:14,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:14,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:15,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:15,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:15,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216307233] [2022-01-31 17:27:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216307233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:15,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:27:15,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758920751] [2022-01-31 17:27:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:15,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:27:15,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:27:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:27:15,169 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 61 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 17:27:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:16,934 INFO L93 Difference]: Finished difference Result 566 states and 574 transitions. [2022-01-31 17:27:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:27:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 61 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 307 [2022-01-31 17:27:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:16,935 INFO L225 Difference]: With dead ends: 566 [2022-01-31 17:27:16,935 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 17:27:16,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:27:16,936 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 552 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:16,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 38 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 17:27:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 317. [2022-01-31 17:27:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 311 states have (on average 1.0128617363344052) internal successors, (315), 311 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 320 transitions. [2022-01-31 17:27:16,988 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 320 transitions. Word has length 307 [2022-01-31 17:27:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:16,988 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 320 transitions. [2022-01-31 17:27:16,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 61 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 17:27:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 320 transitions. [2022-01-31 17:27:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-01-31 17:27:16,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:16,989 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:16,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:27:16,989 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash -602823441, now seen corresponding path program 59 times [2022-01-31 17:27:16,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:16,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070371470] [2022-01-31 17:27:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:16,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:16,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:16,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:16,996 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:18,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:18,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070371470] [2022-01-31 17:27:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1070371470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:18,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:18,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:27:18,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535607392] [2022-01-31 17:27:18,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:18,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:27:18,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:18,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:27:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:27:18,157 INFO L87 Difference]: Start difference. First operand 317 states and 320 transitions. Second operand has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 62 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:19,953 INFO L93 Difference]: Finished difference Result 575 states and 583 transitions. [2022-01-31 17:27:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:27:19,953 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 62 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2022-01-31 17:27:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:19,954 INFO L225 Difference]: With dead ends: 575 [2022-01-31 17:27:19,954 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 17:27:19,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:27:19,955 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 540 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:19,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 48 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 17:27:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2022-01-31 17:27:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 316 states have (on average 1.0126582278481013) internal successors, (320), 316 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 17:27:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 325 transitions. [2022-01-31 17:27:20,002 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 325 transitions. Word has length 312 [2022-01-31 17:27:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:20,002 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 325 transitions. [2022-01-31 17:27:20,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 62 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 325 transitions. [2022-01-31 17:27:20,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 17:27:20,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:20,004 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:20,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:27:20,004 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash 578261463, now seen corresponding path program 60 times [2022-01-31 17:27:20,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:20,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571746006] [2022-01-31 17:27:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:20,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:20,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:20,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:20,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:21,185 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:21,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571746006] [2022-01-31 17:27:21,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [571746006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:21,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:21,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:27:21,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529299983] [2022-01-31 17:27:21,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:21,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:27:21,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:27:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:27:21,187 INFO L87 Difference]: Start difference. First operand 322 states and 325 transitions. Second operand has 64 states, 64 states have (on average 1.203125) internal successors, (77), 63 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 17:27:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:23,032 INFO L93 Difference]: Finished difference Result 584 states and 592 transitions. [2022-01-31 17:27:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:27:23,032 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.203125) internal successors, (77), 63 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 317 [2022-01-31 17:27:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:23,033 INFO L225 Difference]: With dead ends: 584 [2022-01-31 17:27:23,033 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 17:27:23,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:27:23,034 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 530 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:23,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 43 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 17:27:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-01-31 17:27:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 321 states have (on average 1.0124610591900312) internal successors, (325), 321 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 330 transitions. [2022-01-31 17:27:23,097 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 330 transitions. Word has length 317 [2022-01-31 17:27:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:23,097 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 330 transitions. [2022-01-31 17:27:23,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.203125) internal successors, (77), 63 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 17:27:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 330 transitions. [2022-01-31 17:27:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-31 17:27:23,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:23,098 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:23,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:27:23,098 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1346844647, now seen corresponding path program 61 times [2022-01-31 17:27:23,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:23,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016352923] [2022-01-31 17:27:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:23,099 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:23,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:23,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:23,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:24,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:24,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:24,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016352923] [2022-01-31 17:27:24,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016352923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:24,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:24,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:27:24,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413464218] [2022-01-31 17:27:24,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:24,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:27:24,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:27:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:27:24,327 INFO L87 Difference]: Start difference. First operand 327 states and 330 transitions. Second operand has 65 states, 65 states have (on average 1.2) internal successors, (78), 64 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:26,244 INFO L93 Difference]: Finished difference Result 593 states and 601 transitions. [2022-01-31 17:27:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:27:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2) internal successors, (78), 64 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2022-01-31 17:27:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:26,245 INFO L225 Difference]: With dead ends: 593 [2022-01-31 17:27:26,245 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 17:27:26,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:27:26,246 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 588 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:26,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 43 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 17:27:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-01-31 17:27:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.0122699386503067) internal successors, (330), 326 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 17:27:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 335 transitions. [2022-01-31 17:27:26,294 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 335 transitions. Word has length 322 [2022-01-31 17:27:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:26,294 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 335 transitions. [2022-01-31 17:27:26,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2) internal successors, (78), 64 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 335 transitions. [2022-01-31 17:27:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:27:26,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:26,296 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:26,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:27:26,296 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1204863439, now seen corresponding path program 62 times [2022-01-31 17:27:26,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940606659] [2022-01-31 17:27:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:26,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:26,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:26,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:26,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:27,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:27,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:27,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940606659] [2022-01-31 17:27:27,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940606659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:27,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:27,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:27:27,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755840635] [2022-01-31 17:27:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:27,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:27:27,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:27:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:27:27,546 INFO L87 Difference]: Start difference. First operand 332 states and 335 transitions. Second operand has 66 states, 66 states have (on average 1.196969696969697) internal successors, (79), 65 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 17:27:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:29,527 INFO L93 Difference]: Finished difference Result 602 states and 610 transitions. [2022-01-31 17:27:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:27:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.196969696969697) internal successors, (79), 65 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 327 [2022-01-31 17:27:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:29,529 INFO L225 Difference]: With dead ends: 602 [2022-01-31 17:27:29,529 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 17:27:29,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:27:29,530 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 708 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:29,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 33 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 17:27:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2022-01-31 17:27:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 331 states have (on average 1.012084592145015) internal successors, (335), 331 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 340 transitions. [2022-01-31 17:27:29,598 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 340 transitions. Word has length 327 [2022-01-31 17:27:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 340 transitions. [2022-01-31 17:27:29,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.196969696969697) internal successors, (79), 65 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 17:27:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 340 transitions. [2022-01-31 17:27:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-01-31 17:27:29,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:29,600 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:29,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:27:29,600 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash 175715039, now seen corresponding path program 63 times [2022-01-31 17:27:29,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:29,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109576218] [2022-01-31 17:27:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:29,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:29,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:29,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:29,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:30,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:30,853 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 17:27:30,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109576218] [2022-01-31 17:27:30,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109576218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:30,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:30,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:27:30,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272392552] [2022-01-31 17:27:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:30,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:27:30,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:30,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:27:30,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:27:30,856 INFO L87 Difference]: Start difference. First operand 337 states and 340 transitions. Second operand has 67 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 66 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:32,888 INFO L93 Difference]: Finished difference Result 611 states and 619 transitions. [2022-01-31 17:27:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:27:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 66 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 332 [2022-01-31 17:27:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:32,889 INFO L225 Difference]: With dead ends: 611 [2022-01-31 17:27:32,889 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 17:27:32,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:27:32,891 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 582 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:32,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 53 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 17:27:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2022-01-31 17:27:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.0119047619047619) internal successors, (340), 336 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 17:27:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 345 transitions. [2022-01-31 17:27:32,950 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 345 transitions. Word has length 332 [2022-01-31 17:27:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:32,950 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 345 transitions. [2022-01-31 17:27:32,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 66 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 345 transitions. [2022-01-31 17:27:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-31 17:27:32,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:32,952 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:32,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:27:32,952 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:32,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:32,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1373575623, now seen corresponding path program 64 times [2022-01-31 17:27:32,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267686455] [2022-01-31 17:27:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:32,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:32,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:32,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:32,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:34,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:34,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267686455] [2022-01-31 17:27:34,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267686455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:34,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:34,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:27:34,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886622903] [2022-01-31 17:27:34,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:34,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:27:34,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:34,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:27:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:27:34,266 INFO L87 Difference]: Start difference. First operand 342 states and 345 transitions. Second operand has 68 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 67 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 17:27:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:36,354 INFO L93 Difference]: Finished difference Result 620 states and 628 transitions. [2022-01-31 17:27:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:27:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 67 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 337 [2022-01-31 17:27:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:36,355 INFO L225 Difference]: With dead ends: 620 [2022-01-31 17:27:36,355 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 17:27:36,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:27:36,356 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 610 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:36,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 53 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 17:27:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2022-01-31 17:27:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 341 states have (on average 1.0117302052785924) internal successors, (345), 341 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 350 transitions. [2022-01-31 17:27:36,409 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 350 transitions. Word has length 337 [2022-01-31 17:27:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:36,409 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 350 transitions. [2022-01-31 17:27:36,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 67 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 17:27:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 350 transitions. [2022-01-31 17:27:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 17:27:36,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:36,410 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:36,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:27:36,410 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash 326604247, now seen corresponding path program 65 times [2022-01-31 17:27:36,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:36,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822843080] [2022-01-31 17:27:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:36,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:36,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:36,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:36,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:37,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:37,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822843080] [2022-01-31 17:27:37,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822843080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:37,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:37,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:27:37,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425376843] [2022-01-31 17:27:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:37,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:27:37,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:27:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:27:37,762 INFO L87 Difference]: Start difference. First operand 347 states and 350 transitions. Second operand has 69 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 68 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:39,920 INFO L93 Difference]: Finished difference Result 629 states and 637 transitions. [2022-01-31 17:27:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:27:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 68 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 17:27:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:39,921 INFO L225 Difference]: With dead ends: 629 [2022-01-31 17:27:39,921 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 17:27:39,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:27:39,923 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 720 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:39,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 48 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 17:27:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2022-01-31 17:27:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0115606936416186) internal successors, (350), 346 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 17:27:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 355 transitions. [2022-01-31 17:27:39,976 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 355 transitions. Word has length 342 [2022-01-31 17:27:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:39,976 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 355 transitions. [2022-01-31 17:27:39,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 68 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 355 transitions. [2022-01-31 17:27:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:27:39,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:39,978 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:39,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:27:39,978 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1400727105, now seen corresponding path program 66 times [2022-01-31 17:27:39,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781970749] [2022-01-31 17:27:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:39,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:39,979 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:39,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:39,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:41,374 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 17:27:41,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781970749] [2022-01-31 17:27:41,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781970749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:41,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:41,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:27:41,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505566860] [2022-01-31 17:27:41,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:27:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:27:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:27:41,376 INFO L87 Difference]: Start difference. First operand 352 states and 355 transitions. Second operand has 70 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 69 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 17:27:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:43,598 INFO L93 Difference]: Finished difference Result 638 states and 646 transitions. [2022-01-31 17:27:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:27:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 69 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 347 [2022-01-31 17:27:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:43,599 INFO L225 Difference]: With dead ends: 638 [2022-01-31 17:27:43,599 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:27:43,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:27:43,600 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 708 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:43,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 53 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:27:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-01-31 17:27:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 351 states have (on average 1.0113960113960114) internal successors, (355), 351 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 360 transitions. [2022-01-31 17:27:43,656 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 360 transitions. Word has length 347 [2022-01-31 17:27:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:43,656 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 360 transitions. [2022-01-31 17:27:43,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 69 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 17:27:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 360 transitions. [2022-01-31 17:27:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-01-31 17:27:43,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:43,657 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:43,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:27:43,657 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash -166567729, now seen corresponding path program 67 times [2022-01-31 17:27:43,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:43,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242816886] [2022-01-31 17:27:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:43,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:43,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:43,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:43,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:45,099 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242816886] [2022-01-31 17:27:45,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242816886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:45,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:45,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:27:45,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184607135] [2022-01-31 17:27:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:45,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:27:45,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:27:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:27:45,101 INFO L87 Difference]: Start difference. First operand 357 states and 360 transitions. Second operand has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:47,431 INFO L93 Difference]: Finished difference Result 647 states and 655 transitions. [2022-01-31 17:27:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:27:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 352 [2022-01-31 17:27:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:47,432 INFO L225 Difference]: With dead ends: 647 [2022-01-31 17:27:47,432 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 17:27:47,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:27:47,434 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 804 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 863 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:47,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 38 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [863 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 17:27:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 362. [2022-01-31 17:27:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 356 states have (on average 1.0112359550561798) internal successors, (360), 356 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 17:27:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 365 transitions. [2022-01-31 17:27:47,501 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 365 transitions. Word has length 352 [2022-01-31 17:27:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:47,501 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 365 transitions. [2022-01-31 17:27:47,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 365 transitions. [2022-01-31 17:27:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 17:27:47,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:47,502 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:47,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:27:47,502 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1315225161, now seen corresponding path program 68 times [2022-01-31 17:27:47,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508359726] [2022-01-31 17:27:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:47,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:47,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:47,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:47,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:48,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:48,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:48,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508359726] [2022-01-31 17:27:48,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508359726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:48,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:48,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:27:48,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876951959] [2022-01-31 17:27:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:48,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:27:48,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:27:48,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:27:48,955 INFO L87 Difference]: Start difference. First operand 362 states and 365 transitions. Second operand has 72 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 71 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 17:27:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:51,349 INFO L93 Difference]: Finished difference Result 656 states and 664 transitions. [2022-01-31 17:27:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:27:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 71 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 357 [2022-01-31 17:27:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:51,350 INFO L225 Difference]: With dead ends: 656 [2022-01-31 17:27:51,351 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 17:27:51,351 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 17:27:51,352 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 792 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:51,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 43 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 17:27:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2022-01-31 17:27:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.0110803324099722) internal successors, (365), 361 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 370 transitions. [2022-01-31 17:27:51,409 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 370 transitions. Word has length 357 [2022-01-31 17:27:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 370 transitions. [2022-01-31 17:27:51,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 71 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 17:27:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 370 transitions. [2022-01-31 17:27:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 17:27:51,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:51,411 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:51,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:27:51,411 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1058640839, now seen corresponding path program 69 times [2022-01-31 17:27:51,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:51,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169275238] [2022-01-31 17:27:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:51,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:51,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:51,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:51,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:52,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:52,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169275238] [2022-01-31 17:27:52,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [169275238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:52,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:52,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:27:52,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017482036] [2022-01-31 17:27:52,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:52,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:27:52,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:27:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:27:52,929 INFO L87 Difference]: Start difference. First operand 367 states and 370 transitions. Second operand has 73 states, 73 states have (on average 1.178082191780822) internal successors, (86), 72 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:55,353 INFO L93 Difference]: Finished difference Result 665 states and 673 transitions. [2022-01-31 17:27:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:27:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.178082191780822) internal successors, (86), 72 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-01-31 17:27:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:55,355 INFO L225 Difference]: With dead ends: 665 [2022-01-31 17:27:55,355 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 17:27:55,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:27:55,356 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 728 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:55,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 43 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:27:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 17:27:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 372. [2022-01-31 17:27:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.010928961748634) internal successors, (370), 366 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 17:27:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 375 transitions. [2022-01-31 17:27:55,415 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 375 transitions. Word has length 362 [2022-01-31 17:27:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 375 transitions. [2022-01-31 17:27:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.178082191780822) internal successors, (86), 72 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 375 transitions. [2022-01-31 17:27:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 17:27:55,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:55,417 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:27:55,417 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 688460207, now seen corresponding path program 70 times [2022-01-31 17:27:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396256976] [2022-01-31 17:27:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:55,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:55,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:55,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:55,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:57,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:57,036 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 17:27:57,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:57,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396256976] [2022-01-31 17:27:57,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [396256976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:57,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:57,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:27:57,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674647331] [2022-01-31 17:27:57,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:57,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:27:57,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:27:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:27:57,038 INFO L87 Difference]: Start difference. First operand 372 states and 375 transitions. Second operand has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 73 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 17:27:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:59,651 INFO L93 Difference]: Finished difference Result 674 states and 682 transitions. [2022-01-31 17:27:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:27:59,651 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 73 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 367 [2022-01-31 17:27:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:59,652 INFO L225 Difference]: With dead ends: 674 [2022-01-31 17:27:59,652 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 17:27:59,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:27:59,653 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 744 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:59,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 43 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 17:27:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2022-01-31 17:27:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 371 states have (on average 1.0107816711590296) internal successors, (375), 371 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 380 transitions. [2022-01-31 17:27:59,717 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 380 transitions. Word has length 367 [2022-01-31 17:27:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:59,717 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 380 transitions. [2022-01-31 17:27:59,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 73 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 17:27:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 380 transitions. [2022-01-31 17:27:59,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-01-31 17:27:59,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:59,718 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:59,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:27:59,718 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash -44224833, now seen corresponding path program 71 times [2022-01-31 17:27:59,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:59,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158542871] [2022-01-31 17:27:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:59,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:59,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:59,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:59,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:01,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:01,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158542871] [2022-01-31 17:28:01,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [158542871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:01,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:01,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:28:01,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860237611] [2022-01-31 17:28:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:01,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:28:01,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:28:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:28:01,423 INFO L87 Difference]: Start difference. First operand 377 states and 380 transitions. Second operand has 75 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 74 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:03,948 INFO L93 Difference]: Finished difference Result 683 states and 691 transitions. [2022-01-31 17:28:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:28:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 74 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 372 [2022-01-31 17:28:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:03,950 INFO L225 Difference]: With dead ends: 683 [2022-01-31 17:28:03,950 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 17:28:03,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:28:03,951 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 660 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:03,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 53 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 17:28:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382. [2022-01-31 17:28:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.0106382978723405) internal successors, (380), 376 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 17:28:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 385 transitions. [2022-01-31 17:28:04,015 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 385 transitions. Word has length 372 [2022-01-31 17:28:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:04,015 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 385 transitions. [2022-01-31 17:28:04,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 74 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 385 transitions. [2022-01-31 17:28:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 17:28:04,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:04,017 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:04,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:28:04,017 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:04,017 INFO L85 PathProgramCache]: Analyzing trace with hash -928249433, now seen corresponding path program 72 times [2022-01-31 17:28:04,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:04,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362218050] [2022-01-31 17:28:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:04,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:04,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:04,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:04,025 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:05,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362218050] [2022-01-31 17:28:05,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362218050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:05,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:05,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:28:05,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037483840] [2022-01-31 17:28:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:05,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:28:05,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:28:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:28:05,634 INFO L87 Difference]: Start difference. First operand 382 states and 385 transitions. Second operand has 76 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 75 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 17:28:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:08,212 INFO L93 Difference]: Finished difference Result 692 states and 700 transitions. [2022-01-31 17:28:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:28:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 75 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 377 [2022-01-31 17:28:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:08,213 INFO L225 Difference]: With dead ends: 692 [2022-01-31 17:28:08,213 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 17:28:08,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:28:08,214 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 832 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:08,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 38 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 17:28:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2022-01-31 17:28:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.010498687664042) internal successors, (385), 381 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 390 transitions. [2022-01-31 17:28:08,278 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 390 transitions. Word has length 377 [2022-01-31 17:28:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:08,278 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 390 transitions. [2022-01-31 17:28:08,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 75 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 17:28:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 390 transitions. [2022-01-31 17:28:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 17:28:08,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:08,280 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:08,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:28:08,280 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1101869495, now seen corresponding path program 73 times [2022-01-31 17:28:08,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:08,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152209300] [2022-01-31 17:28:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:08,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:08,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:08,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:08,288 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:09,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152209300] [2022-01-31 17:28:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1152209300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:09,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:28:09,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007847448] [2022-01-31 17:28:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:09,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:28:09,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:28:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:28:09,942 INFO L87 Difference]: Start difference. First operand 387 states and 390 transitions. Second operand has 77 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 76 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:12,590 INFO L93 Difference]: Finished difference Result 701 states and 709 transitions. [2022-01-31 17:28:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:28:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 76 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 382 [2022-01-31 17:28:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:12,591 INFO L225 Difference]: With dead ends: 701 [2022-01-31 17:28:12,591 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 17:28:12,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:28:12,592 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 838 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:12,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 33 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 17:28:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2022-01-31 17:28:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 386 states have (on average 1.0103626943005182) internal successors, (390), 386 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 395 transitions. [2022-01-31 17:28:12,659 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 395 transitions. Word has length 382 [2022-01-31 17:28:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:12,659 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 395 transitions. [2022-01-31 17:28:12,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 76 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 395 transitions. [2022-01-31 17:28:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:28:12,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:12,661 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:12,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:28:12,661 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1268504161, now seen corresponding path program 74 times [2022-01-31 17:28:12,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:12,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078673144] [2022-01-31 17:28:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:12,662 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:12,662 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:12,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:12,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:14,378 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 17:28:14,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:14,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078673144] [2022-01-31 17:28:14,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078673144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:14,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:14,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:28:14,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036086412] [2022-01-31 17:28:14,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:14,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:28:14,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:28:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:28:14,380 INFO L87 Difference]: Start difference. First operand 392 states and 395 transitions. Second operand has 78 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 77 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 17:28:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:17,069 INFO L93 Difference]: Finished difference Result 710 states and 718 transitions. [2022-01-31 17:28:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:28:17,069 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 77 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 387 [2022-01-31 17:28:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:17,070 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:28:17,070 INFO L226 Difference]: Without dead ends: 399 [2022-01-31 17:28:17,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:28:17,072 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 732 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:17,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 43 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-01-31 17:28:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 397. [2022-01-31 17:28:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 391 states have (on average 1.010230179028133) internal successors, (395), 391 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 400 transitions. [2022-01-31 17:28:17,140 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 400 transitions. Word has length 387 [2022-01-31 17:28:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:17,141 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 400 transitions. [2022-01-31 17:28:17,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 77 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 17:28:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 400 transitions. [2022-01-31 17:28:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-01-31 17:28:17,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:17,142 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:17,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:28:17,142 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1629905745, now seen corresponding path program 75 times [2022-01-31 17:28:17,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:17,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473289955] [2022-01-31 17:28:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:17,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:17,144 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:17,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:17,151 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:18,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:18,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:18,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473289955] [2022-01-31 17:28:18,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473289955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:18,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:18,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:28:18,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130688352] [2022-01-31 17:28:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:18,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:28:18,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:28:18,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:28:18,904 INFO L87 Difference]: Start difference. First operand 397 states and 400 transitions. Second operand has 79 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 78 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:21,720 INFO L93 Difference]: Finished difference Result 719 states and 727 transitions. [2022-01-31 17:28:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:28:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 78 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 392 [2022-01-31 17:28:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:21,721 INFO L225 Difference]: With dead ends: 719 [2022-01-31 17:28:21,721 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 17:28:21,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:28:21,723 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 782 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:21,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 33 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 17:28:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2022-01-31 17:28:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 396 states have (on average 1.0101010101010102) internal successors, (400), 396 states have internal predecessors, (400), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 405 transitions. [2022-01-31 17:28:21,802 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 405 transitions. Word has length 392 [2022-01-31 17:28:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 405 transitions. [2022-01-31 17:28:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 78 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 405 transitions. [2022-01-31 17:28:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-01-31 17:28:21,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:21,804 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:21,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:28:21,804 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash -32411241, now seen corresponding path program 76 times [2022-01-31 17:28:21,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:21,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243270002] [2022-01-31 17:28:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:21,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:21,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:21,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:21,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:23,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:23,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:23,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243270002] [2022-01-31 17:28:23,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243270002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:23,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:23,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:28:23,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895305082] [2022-01-31 17:28:23,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:23,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:28:23,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:28:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:28:23,629 INFO L87 Difference]: Start difference. First operand 402 states and 405 transitions. Second operand has 80 states, 80 states have (on average 1.1625) internal successors, (93), 79 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 17:28:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:26,468 INFO L93 Difference]: Finished difference Result 728 states and 736 transitions. [2022-01-31 17:28:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:28:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1625) internal successors, (93), 79 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 397 [2022-01-31 17:28:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:26,469 INFO L225 Difference]: With dead ends: 728 [2022-01-31 17:28:26,469 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 17:28:26,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:28:26,471 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 670 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:26,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 53 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [736 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 17:28:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 407. [2022-01-31 17:28:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 401 states have (on average 1.0099750623441397) internal successors, (405), 401 states have internal predecessors, (405), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 410 transitions. [2022-01-31 17:28:26,542 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 410 transitions. Word has length 397 [2022-01-31 17:28:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:26,542 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 410 transitions. [2022-01-31 17:28:26,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1625) internal successors, (93), 79 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 17:28:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 410 transitions. [2022-01-31 17:28:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-01-31 17:28:26,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:26,544 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:26,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:28:26,544 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:26,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1447923801, now seen corresponding path program 77 times [2022-01-31 17:28:26,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:26,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876162939] [2022-01-31 17:28:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:26,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:26,545 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:26,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:26,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:28,378 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 17:28:28,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:28,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876162939] [2022-01-31 17:28:28,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876162939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:28,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:28,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:28:28,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792604084] [2022-01-31 17:28:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:28,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:28:28,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:28:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:28:28,380 INFO L87 Difference]: Start difference. First operand 407 states and 410 transitions. Second operand has 81 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 80 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:31,337 INFO L93 Difference]: Finished difference Result 737 states and 745 transitions. [2022-01-31 17:28:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:28:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 80 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 402 [2022-01-31 17:28:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:31,338 INFO L225 Difference]: With dead ends: 737 [2022-01-31 17:28:31,338 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 17:28:31,340 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 17:28:31,340 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 674 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:31,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 63 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 17:28:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2022-01-31 17:28:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.0098522167487685) internal successors, (410), 406 states have internal predecessors, (410), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 415 transitions. [2022-01-31 17:28:31,423 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 415 transitions. Word has length 402 [2022-01-31 17:28:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:31,423 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 415 transitions. [2022-01-31 17:28:31,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 80 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 415 transitions. [2022-01-31 17:28:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-31 17:28:31,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:31,425 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:31,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:28:31,425 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash 630448527, now seen corresponding path program 78 times [2022-01-31 17:28:31,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:31,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229649396] [2022-01-31 17:28:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:31,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:31,426 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:31,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:31,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:33,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:33,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:33,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229649396] [2022-01-31 17:28:33,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229649396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:33,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:33,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:28:33,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122482963] [2022-01-31 17:28:33,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:33,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:28:33,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:28:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:28:33,293 INFO L87 Difference]: Start difference. First operand 412 states and 415 transitions. Second operand has 82 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 81 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 17:28:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:36,318 INFO L93 Difference]: Finished difference Result 746 states and 754 transitions. [2022-01-31 17:28:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:28:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 81 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 407 [2022-01-31 17:28:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:36,320 INFO L225 Difference]: With dead ends: 746 [2022-01-31 17:28:36,320 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 17:28:36,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:28:36,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 748 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:36,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 48 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 17:28:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2022-01-31 17:28:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 411 states have (on average 1.0097323600973236) internal successors, (415), 411 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 420 transitions. [2022-01-31 17:28:36,399 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 420 transitions. Word has length 407 [2022-01-31 17:28:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:36,399 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 420 transitions. [2022-01-31 17:28:36,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 81 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 17:28:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 420 transitions. [2022-01-31 17:28:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-01-31 17:28:36,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:36,401 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:36,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:28:36,401 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2030545567, now seen corresponding path program 79 times [2022-01-31 17:28:36,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:36,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939703318] [2022-01-31 17:28:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:36,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:36,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:36,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:36,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:38,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:38,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939703318] [2022-01-31 17:28:38,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939703318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:38,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:38,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:28:38,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581079536] [2022-01-31 17:28:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:38,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:28:38,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:28:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:28:38,328 INFO L87 Difference]: Start difference. First operand 417 states and 420 transitions. Second operand has 83 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:41,404 INFO L93 Difference]: Finished difference Result 755 states and 763 transitions. [2022-01-31 17:28:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:28:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 412 [2022-01-31 17:28:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:41,406 INFO L225 Difference]: With dead ends: 755 [2022-01-31 17:28:41,406 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 17:28:41,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:28:41,407 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 772 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:41,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 48 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 17:28:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 422. [2022-01-31 17:28:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 416 states have (on average 1.0096153846153846) internal successors, (420), 416 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 425 transitions. [2022-01-31 17:28:41,486 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 425 transitions. Word has length 412 [2022-01-31 17:28:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:41,487 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 425 transitions. [2022-01-31 17:28:41,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 425 transitions. [2022-01-31 17:28:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-01-31 17:28:41,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:41,488 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:41,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:28:41,489 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1731495545, now seen corresponding path program 80 times [2022-01-31 17:28:41,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:41,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320896786] [2022-01-31 17:28:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:41,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:41,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:41,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:41,505 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:43,485 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 17:28:43,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320896786] [2022-01-31 17:28:43,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [320896786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:43,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:43,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:28:43,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353147820] [2022-01-31 17:28:43,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:43,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:28:43,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:28:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:28:43,487 INFO L87 Difference]: Start difference. First operand 422 states and 425 transitions. Second operand has 84 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 83 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 17:28:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:46,675 INFO L93 Difference]: Finished difference Result 764 states and 772 transitions. [2022-01-31 17:28:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:28:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 83 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 417 [2022-01-31 17:28:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:46,676 INFO L225 Difference]: With dead ends: 764 [2022-01-31 17:28:46,676 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 17:28:46,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:28:46,677 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 730 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:46,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 43 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 17:28:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 427. [2022-01-31 17:28:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.009501187648456) internal successors, (425), 421 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 430 transitions. [2022-01-31 17:28:46,761 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 430 transitions. Word has length 417 [2022-01-31 17:28:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:46,762 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 430 transitions. [2022-01-31 17:28:46,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 83 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 17:28:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 430 transitions. [2022-01-31 17:28:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 17:28:46,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:46,763 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:46,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:28:46,764 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 631852439, now seen corresponding path program 81 times [2022-01-31 17:28:46,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624921084] [2022-01-31 17:28:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:46,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:46,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:46,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:46,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:48,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:48,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:48,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624921084] [2022-01-31 17:28:48,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624921084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:48,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:48,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:28:48,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528887618] [2022-01-31 17:28:48,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:48,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:28:48,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:28:48,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:28:48,794 INFO L87 Difference]: Start difference. First operand 427 states and 430 transitions. Second operand has 85 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 84 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:52,106 INFO L93 Difference]: Finished difference Result 773 states and 781 transitions. [2022-01-31 17:28:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:28:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 84 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 422 [2022-01-31 17:28:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:52,107 INFO L225 Difference]: With dead ends: 773 [2022-01-31 17:28:52,107 INFO L226 Difference]: Without dead ends: 434 [2022-01-31 17:28:52,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:28:52,108 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 760 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:52,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 43 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-31 17:28:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-01-31 17:28:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.0093896713615023) internal successors, (430), 426 states have internal predecessors, (430), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 435 transitions. [2022-01-31 17:28:52,207 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 435 transitions. Word has length 422 [2022-01-31 17:28:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:52,207 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 435 transitions. [2022-01-31 17:28:52,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 84 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 435 transitions. [2022-01-31 17:28:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-31 17:28:52,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:52,209 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:52,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:28:52,209 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash 865614207, now seen corresponding path program 82 times [2022-01-31 17:28:52,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:52,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654161960] [2022-01-31 17:28:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:52,210 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:52,210 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:52,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:52,220 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:54,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:54,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:54,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654161960] [2022-01-31 17:28:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [654161960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:54,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:54,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:28:54,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073096685] [2022-01-31 17:28:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:54,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:28:54,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:28:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:28:54,280 INFO L87 Difference]: Start difference. First operand 432 states and 435 transitions. Second operand has 86 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 85 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 17:28:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:57,654 INFO L93 Difference]: Finished difference Result 782 states and 790 transitions. [2022-01-31 17:28:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:28:57,654 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 85 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 427 [2022-01-31 17:28:57,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:57,655 INFO L225 Difference]: With dead ends: 782 [2022-01-31 17:28:57,656 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 17:28:57,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:28:57,657 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 876 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 948 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 948 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:57,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 48 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [948 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:28:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 17:28:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 437. [2022-01-31 17:28:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 431 states have (on average 1.0092807424593968) internal successors, (435), 431 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 440 transitions. [2022-01-31 17:28:57,741 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 440 transitions. Word has length 427 [2022-01-31 17:28:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:57,742 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 440 transitions. [2022-01-31 17:28:57,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.1511627906976745) internal successors, (99), 85 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 17:28:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 440 transitions. [2022-01-31 17:28:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-01-31 17:28:57,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:57,743 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:57,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:28:57,744 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1248286863, now seen corresponding path program 83 times [2022-01-31 17:28:57,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:57,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132398017] [2022-01-31 17:28:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:57,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:57,745 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:57,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:57,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:59,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132398017] [2022-01-31 17:28:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132398017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:59,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:59,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:28:59,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386014807] [2022-01-31 17:28:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:28:59,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:28:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:28:59,872 INFO L87 Difference]: Start difference. First operand 437 states and 440 transitions. Second operand has 87 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 86 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:03,351 INFO L93 Difference]: Finished difference Result 791 states and 799 transitions. [2022-01-31 17:29:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:29:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 86 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 432 [2022-01-31 17:29:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:03,353 INFO L225 Difference]: With dead ends: 791 [2022-01-31 17:29:03,353 INFO L226 Difference]: Without dead ends: 444 [2022-01-31 17:29:03,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:29:03,354 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 940 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1012 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:03,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 33 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1012 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:29:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-31 17:29:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2022-01-31 17:29:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 436 states have (on average 1.0091743119266054) internal successors, (440), 436 states have internal predecessors, (440), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 445 transitions. [2022-01-31 17:29:03,452 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 445 transitions. Word has length 432 [2022-01-31 17:29:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:03,452 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 445 transitions. [2022-01-31 17:29:03,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 86 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 445 transitions. [2022-01-31 17:29:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-01-31 17:29:03,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:03,454 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:03,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:29:03,454 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1076223625, now seen corresponding path program 84 times [2022-01-31 17:29:03,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:03,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988910857] [2022-01-31 17:29:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:03,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:03,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:03,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:03,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:05,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:05,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988910857] [2022-01-31 17:29:05,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988910857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:05,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:05,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:29:05,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284567603] [2022-01-31 17:29:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:05,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:29:05,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:29:05,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:29:05,634 INFO L87 Difference]: Start difference. First operand 442 states and 445 transitions. Second operand has 88 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 87 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 17:29:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:09,151 INFO L93 Difference]: Finished difference Result 800 states and 808 transitions. [2022-01-31 17:29:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:29:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 87 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 437 [2022-01-31 17:29:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:09,152 INFO L225 Difference]: With dead ends: 800 [2022-01-31 17:29:09,152 INFO L226 Difference]: Without dead ends: 449 [2022-01-31 17:29:09,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:29:09,154 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 982 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 1057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1057 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:09,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 53 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1057 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:29:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-31 17:29:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2022-01-31 17:29:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 441 states have (on average 1.0090702947845804) internal successors, (445), 441 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 450 transitions. [2022-01-31 17:29:09,242 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 450 transitions. Word has length 437 [2022-01-31 17:29:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:09,242 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 450 transitions. [2022-01-31 17:29:09,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 87 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 17:29:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 450 transitions. [2022-01-31 17:29:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-01-31 17:29:09,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:09,244 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:09,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:29:09,244 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:09,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2079208569, now seen corresponding path program 85 times [2022-01-31 17:29:09,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:09,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174012302] [2022-01-31 17:29:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:09,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:09,245 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:09,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:09,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:11,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:11,463 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:11,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174012302] [2022-01-31 17:29:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174012302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:11,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:11,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:29:11,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941546892] [2022-01-31 17:29:11,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:11,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:29:11,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:29:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:29:11,466 INFO L87 Difference]: Start difference. First operand 447 states and 450 transitions. Second operand has 89 states, 89 states have (on average 1.146067415730337) internal successors, (102), 88 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:15,021 INFO L93 Difference]: Finished difference Result 809 states and 817 transitions. [2022-01-31 17:29:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:29:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.146067415730337) internal successors, (102), 88 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 442 [2022-01-31 17:29:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:15,023 INFO L225 Difference]: With dead ends: 809 [2022-01-31 17:29:15,023 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 17:29:15,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:29:15,024 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 814 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:15,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 53 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:29:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 17:29:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2022-01-31 17:29:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 446 states have (on average 1.0089686098654709) internal successors, (450), 446 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 455 transitions. [2022-01-31 17:29:15,115 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 455 transitions. Word has length 442 [2022-01-31 17:29:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:15,115 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 455 transitions. [2022-01-31 17:29:15,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.146067415730337) internal successors, (102), 88 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 455 transitions. [2022-01-31 17:29:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 17:29:15,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:15,117 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:15,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:29:15,117 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1970352495, now seen corresponding path program 86 times [2022-01-31 17:29:15,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089349048] [2022-01-31 17:29:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:15,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:15,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:15,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:15,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:17,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:17,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089349048] [2022-01-31 17:29:17,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089349048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:17,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:17,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:29:17,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10318385] [2022-01-31 17:29:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:17,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:29:17,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:29:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:29:17,381 INFO L87 Difference]: Start difference. First operand 452 states and 455 transitions. Second operand has 90 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 89 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 17:29:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:21,021 INFO L93 Difference]: Finished difference Result 818 states and 826 transitions. [2022-01-31 17:29:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:29:21,021 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 89 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 447 [2022-01-31 17:29:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:21,022 INFO L225 Difference]: With dead ends: 818 [2022-01-31 17:29:21,022 INFO L226 Difference]: Without dead ends: 459 [2022-01-31 17:29:21,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:29:21,024 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 898 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:21,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 38 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:29:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-31 17:29:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-01-31 17:29:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 451 states have (on average 1.0088691796008868) internal successors, (455), 451 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 460 transitions. [2022-01-31 17:29:21,127 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 460 transitions. Word has length 447 [2022-01-31 17:29:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:21,127 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 460 transitions. [2022-01-31 17:29:21,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 89 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 17:29:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 460 transitions. [2022-01-31 17:29:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-01-31 17:29:21,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:21,129 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:21,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:29:21,129 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash -243751297, now seen corresponding path program 87 times [2022-01-31 17:29:21,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:21,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271491218] [2022-01-31 17:29:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:21,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:21,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:21,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:21,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:23,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:23,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271491218] [2022-01-31 17:29:23,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271491218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:23,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:23,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:29:23,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140137624] [2022-01-31 17:29:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:23,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:29:23,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:29:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:29:23,440 INFO L87 Difference]: Start difference. First operand 457 states and 460 transitions. Second operand has 91 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 90 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:27,122 INFO L93 Difference]: Finished difference Result 827 states and 835 transitions. [2022-01-31 17:29:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:29:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 90 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 452 [2022-01-31 17:29:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:27,123 INFO L225 Difference]: With dead ends: 827 [2022-01-31 17:29:27,123 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 17:29:27,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:29:27,125 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 844 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:27,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 48 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:29:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 17:29:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2022-01-31 17:29:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 456 states have (on average 1.0087719298245614) internal successors, (460), 456 states have internal predecessors, (460), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 465 transitions. [2022-01-31 17:29:27,232 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 465 transitions. Word has length 452 [2022-01-31 17:29:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:27,232 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 465 transitions. [2022-01-31 17:29:27,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.1428571428571428) internal successors, (104), 90 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 465 transitions. [2022-01-31 17:29:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-01-31 17:29:27,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:27,234 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:27,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:29:27,234 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2050845031, now seen corresponding path program 88 times [2022-01-31 17:29:27,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:27,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76131466] [2022-01-31 17:29:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:27,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:27,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:27,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:27,246 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:29,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:29,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76131466] [2022-01-31 17:29:29,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [76131466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:29,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:29,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:29:29,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504405784] [2022-01-31 17:29:29,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:29,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:29:29,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:29:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:29:29,603 INFO L87 Difference]: Start difference. First operand 462 states and 465 transitions. Second operand has 92 states, 92 states have (on average 1.141304347826087) internal successors, (105), 91 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 17:29:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:33,425 INFO L93 Difference]: Finished difference Result 836 states and 844 transitions. [2022-01-31 17:29:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:29:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.141304347826087) internal successors, (105), 91 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 457 [2022-01-31 17:29:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:33,426 INFO L225 Difference]: With dead ends: 836 [2022-01-31 17:29:33,426 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 17:29:33,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:29:33,428 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 924 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:33,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 33 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:29:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 17:29:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2022-01-31 17:29:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 461 states have (on average 1.0086767895878526) internal successors, (465), 461 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 470 transitions. [2022-01-31 17:29:33,524 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 470 transitions. Word has length 457 [2022-01-31 17:29:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:33,524 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 470 transitions. [2022-01-31 17:29:33,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.141304347826087) internal successors, (105), 91 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 17:29:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 470 transitions. [2022-01-31 17:29:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-01-31 17:29:33,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:33,526 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:29:33,526 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1284773513, now seen corresponding path program 89 times [2022-01-31 17:29:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301188397] [2022-01-31 17:29:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:33,527 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:33,527 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:33,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:33,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:35,961 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 17:29:35,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301188397] [2022-01-31 17:29:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301188397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:35,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:35,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:29:35,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912720738] [2022-01-31 17:29:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:29:35,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:29:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:29:35,964 INFO L87 Difference]: Start difference. First operand 467 states and 470 transitions. Second operand has 93 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:40,072 INFO L93 Difference]: Finished difference Result 845 states and 853 transitions. [2022-01-31 17:29:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:29:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 462 [2022-01-31 17:29:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:40,073 INFO L225 Difference]: With dead ends: 845 [2022-01-31 17:29:40,073 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 17:29:40,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:29:40,075 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 910 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:40,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 63 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:29:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 17:29:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 472. [2022-01-31 17:29:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.0085836909871244) internal successors, (470), 466 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 475 transitions. [2022-01-31 17:29:40,187 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 475 transitions. Word has length 462 [2022-01-31 17:29:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 475 transitions. [2022-01-31 17:29:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 92 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 475 transitions. [2022-01-31 17:29:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:29:40,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:40,189 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:40,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:29:40,189 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:40,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1646184799, now seen corresponding path program 90 times [2022-01-31 17:29:40,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:40,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690775152] [2022-01-31 17:29:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:40,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:40,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:40,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:40,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:42,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:42,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690775152] [2022-01-31 17:29:42,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [690775152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:42,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:42,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:29:42,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778757670] [2022-01-31 17:29:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:42,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:29:42,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:29:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:29:42,683 INFO L87 Difference]: Start difference. First operand 472 states and 475 transitions. Second operand has 94 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 93 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 17:29:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:46,740 INFO L93 Difference]: Finished difference Result 854 states and 862 transitions. [2022-01-31 17:29:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:29:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 93 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 467 [2022-01-31 17:29:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:46,741 INFO L225 Difference]: With dead ends: 854 [2022-01-31 17:29:46,741 INFO L226 Difference]: Without dead ends: 479 [2022-01-31 17:29:46,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:29:46,743 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 956 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 1036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1036 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:46,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 58 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1036 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:29:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-31 17:29:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-01-31 17:29:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 471 states have (on average 1.0084925690021231) internal successors, (475), 471 states have internal predecessors, (475), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 480 transitions. [2022-01-31 17:29:46,845 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 480 transitions. Word has length 467 [2022-01-31 17:29:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:46,845 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 480 transitions. [2022-01-31 17:29:46,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 93 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 17:29:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 480 transitions. [2022-01-31 17:29:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-01-31 17:29:46,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:46,847 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:46,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:29:46,847 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1824232559, now seen corresponding path program 91 times [2022-01-31 17:29:46,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:46,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684111050] [2022-01-31 17:29:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:46,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:46,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:46,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:46,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:49,360 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 17:29:49,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684111050] [2022-01-31 17:29:49,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [684111050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:49,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:49,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:29:49,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844891265] [2022-01-31 17:29:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:49,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:29:49,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:49,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:29:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:29:49,362 INFO L87 Difference]: Start difference. First operand 477 states and 480 transitions. Second operand has 95 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 94 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:53,599 INFO L93 Difference]: Finished difference Result 863 states and 871 transitions. [2022-01-31 17:29:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:29:53,599 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 94 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 472 [2022-01-31 17:29:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:53,600 INFO L225 Difference]: With dead ends: 863 [2022-01-31 17:29:53,600 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 17:29:53,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:29:53,602 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 932 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1012 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1012 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:53,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 53 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1012 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:29:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 17:29:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 482. [2022-01-31 17:29:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 476 states have (on average 1.0084033613445378) internal successors, (480), 476 states have internal predecessors, (480), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 485 transitions. [2022-01-31 17:29:53,706 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 485 transitions. Word has length 472 [2022-01-31 17:29:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:53,706 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 485 transitions. [2022-01-31 17:29:53,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.1368421052631579) internal successors, (108), 94 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 485 transitions. [2022-01-31 17:29:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-01-31 17:29:53,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:53,708 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:53,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:29:53,708 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1359654569, now seen corresponding path program 92 times [2022-01-31 17:29:53,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:53,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627941449] [2022-01-31 17:29:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:53,710 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:53,710 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:53,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:53,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:56,392 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 17:29:56,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627941449] [2022-01-31 17:29:56,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627941449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:56,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:56,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:29:56,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505242966] [2022-01-31 17:29:56,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:56,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:29:56,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:29:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:29:56,395 INFO L87 Difference]: Start difference. First operand 482 states and 485 transitions. Second operand has 96 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 95 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 17:30:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:00,812 INFO L93 Difference]: Finished difference Result 872 states and 880 transitions. [2022-01-31 17:30:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:30:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 95 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 477 [2022-01-31 17:30:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:00,814 INFO L225 Difference]: With dead ends: 872 [2022-01-31 17:30:00,814 INFO L226 Difference]: Without dead ends: 489 [2022-01-31 17:30:00,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:30:00,815 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 814 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 896 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:00,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 63 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [896 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-31 17:30:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2022-01-31 17:30:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 481 states have (on average 1.0083160083160083) internal successors, (485), 481 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 490 transitions. [2022-01-31 17:30:00,921 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 490 transitions. Word has length 477 [2022-01-31 17:30:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:00,922 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 490 transitions. [2022-01-31 17:30:00,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 95 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 17:30:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 490 transitions. [2022-01-31 17:30:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-01-31 17:30:00,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:00,924 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:00,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:30:00,924 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1036540057, now seen corresponding path program 93 times [2022-01-31 17:30:00,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:00,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781059572] [2022-01-31 17:30:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:00,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:00,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:00,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:00,938 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:03,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:03,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:03,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781059572] [2022-01-31 17:30:03,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781059572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:03,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:03,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:30:03,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270426687] [2022-01-31 17:30:03,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:03,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:30:03,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:30:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:30:03,596 INFO L87 Difference]: Start difference. First operand 487 states and 490 transitions. Second operand has 97 states, 97 states have (on average 1.134020618556701) internal successors, (110), 96 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:08,050 INFO L93 Difference]: Finished difference Result 881 states and 889 transitions. [2022-01-31 17:30:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:30:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.134020618556701) internal successors, (110), 96 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 482 [2022-01-31 17:30:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:08,057 INFO L225 Difference]: With dead ends: 881 [2022-01-31 17:30:08,057 INFO L226 Difference]: Without dead ends: 494 [2022-01-31 17:30:08,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:30:08,058 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 964 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:08,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 63 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-31 17:30:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2022-01-31 17:30:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 486 states have (on average 1.008230452674897) internal successors, (490), 486 states have internal predecessors, (490), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 495 transitions. [2022-01-31 17:30:08,190 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 495 transitions. Word has length 482 [2022-01-31 17:30:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:08,190 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 495 transitions. [2022-01-31 17:30:08,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.134020618556701) internal successors, (110), 96 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 495 transitions. [2022-01-31 17:30:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-01-31 17:30:08,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:08,193 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:08,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:30:08,193 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:08,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1352728911, now seen corresponding path program 94 times [2022-01-31 17:30:08,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:08,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274122442] [2022-01-31 17:30:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:08,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:08,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:08,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:08,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:10,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:10,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274122442] [2022-01-31 17:30:10,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274122442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:10,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:10,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:30:10,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112496611] [2022-01-31 17:30:10,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:10,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:30:10,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:30:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:30:10,914 INFO L87 Difference]: Start difference. First operand 492 states and 495 transitions. Second operand has 98 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 97 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 17:30:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:15,588 INFO L93 Difference]: Finished difference Result 890 states and 898 transitions. [2022-01-31 17:30:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:30:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 97 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 487 [2022-01-31 17:30:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:15,589 INFO L225 Difference]: With dead ends: 890 [2022-01-31 17:30:15,589 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 17:30:15,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:30:15,591 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1274 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:15,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 38 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:30:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 17:30:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2022-01-31 17:30:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 491 states have (on average 1.0081466395112015) internal successors, (495), 491 states have internal predecessors, (495), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 500 transitions. [2022-01-31 17:30:15,701 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 500 transitions. Word has length 487 [2022-01-31 17:30:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:15,701 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 500 transitions. [2022-01-31 17:30:15,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 97 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 17:30:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 500 transitions. [2022-01-31 17:30:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2022-01-31 17:30:15,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:15,703 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:15,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:30:15,703 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash -625991073, now seen corresponding path program 95 times [2022-01-31 17:30:15,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:15,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294310689] [2022-01-31 17:30:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:15,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:15,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:15,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:15,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:18,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:18,468 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 17:30:18,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:18,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294310689] [2022-01-31 17:30:18,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [294310689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:18,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:18,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:30:18,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768334859] [2022-01-31 17:30:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:18,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:30:18,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:18,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:30:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:30:18,470 INFO L87 Difference]: Start difference. First operand 497 states and 500 transitions. Second operand has 99 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 98 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:23,097 INFO L93 Difference]: Finished difference Result 899 states and 907 transitions. [2022-01-31 17:30:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:30:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 98 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 492 [2022-01-31 17:30:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:23,099 INFO L225 Difference]: With dead ends: 899 [2022-01-31 17:30:23,099 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 17:30:23,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:30:23,101 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1036 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1124 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:23,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 48 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1124 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 17:30:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 502. [2022-01-31 17:30:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 496 states have (on average 1.0080645161290323) internal successors, (500), 496 states have internal predecessors, (500), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 505 transitions. [2022-01-31 17:30:23,213 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 505 transitions. Word has length 492 [2022-01-31 17:30:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:23,213 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 505 transitions. [2022-01-31 17:30:23,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 98 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 505 transitions. [2022-01-31 17:30:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2022-01-31 17:30:23,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:23,215 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:23,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:30:23,216 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash 620878151, now seen corresponding path program 96 times [2022-01-31 17:30:23,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:23,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359279342] [2022-01-31 17:30:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:23,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:23,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:23,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:23,230 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:26,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:26,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359279342] [2022-01-31 17:30:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359279342] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:26,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:26,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:30:26,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060955802] [2022-01-31 17:30:26,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:26,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:30:26,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:26,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:30:26,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:30:26,041 INFO L87 Difference]: Start difference. First operand 502 states and 505 transitions. Second operand has 100 states, 100 states have (on average 1.13) internal successors, (113), 99 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 17:30:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:30,743 INFO L93 Difference]: Finished difference Result 908 states and 916 transitions. [2022-01-31 17:30:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:30:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.13) internal successors, (113), 99 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 497 [2022-01-31 17:30:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:30,745 INFO L225 Difference]: With dead ends: 908 [2022-01-31 17:30:30,745 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 17:30:30,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:30:30,747 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1136 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 1225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1225 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:30,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 58 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1225 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 17:30:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 507. [2022-01-31 17:30:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 501 states have (on average 1.0079840319361277) internal successors, (505), 501 states have internal predecessors, (505), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 510 transitions. [2022-01-31 17:30:30,863 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 510 transitions. Word has length 497 [2022-01-31 17:30:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:30,863 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 510 transitions. [2022-01-31 17:30:30,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.13) internal successors, (113), 99 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 17:30:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 510 transitions. [2022-01-31 17:30:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 17:30:30,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:30,865 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:30:30,866 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:30,866 INFO L85 PathProgramCache]: Analyzing trace with hash -554367657, now seen corresponding path program 97 times [2022-01-31 17:30:30,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:30,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713549830] [2022-01-31 17:30:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:30,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:30,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:30,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:30,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:33,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:33,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713549830] [2022-01-31 17:30:33,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [713549830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:33,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:33,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:30:33,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743460405] [2022-01-31 17:30:33,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:33,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:30:33,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:30:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:30:33,706 INFO L87 Difference]: Start difference. First operand 507 states and 510 transitions. Second operand has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:38,398 INFO L93 Difference]: Finished difference Result 917 states and 925 transitions. [2022-01-31 17:30:38,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:30:38,398 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 502 [2022-01-31 17:30:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:38,399 INFO L225 Difference]: With dead ends: 917 [2022-01-31 17:30:38,400 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 17:30:38,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:30:38,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1052 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 1142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1142 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:38,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 43 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1142 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 17:30:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2022-01-31 17:30:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 506 states have (on average 1.007905138339921) internal successors, (510), 506 states have internal predecessors, (510), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 515 transitions. [2022-01-31 17:30:38,530 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 515 transitions. Word has length 502 [2022-01-31 17:30:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:38,530 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 515 transitions. [2022-01-31 17:30:38,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 515 transitions. [2022-01-31 17:30:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:30:38,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:38,532 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:38,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:30:38,532 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2012731711, now seen corresponding path program 98 times [2022-01-31 17:30:38,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:38,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379763897] [2022-01-31 17:30:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:38,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:38,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:38,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:38,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:41,461 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379763897] [2022-01-31 17:30:41,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [379763897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:41,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:41,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:30:41,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971918487] [2022-01-31 17:30:41,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:41,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:30:41,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:30:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:30:41,463 INFO L87 Difference]: Start difference. First operand 512 states and 515 transitions. Second operand has 102 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 101 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 17:30:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:46,364 INFO L93 Difference]: Finished difference Result 926 states and 934 transitions. [2022-01-31 17:30:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:30:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 101 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 507 [2022-01-31 17:30:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:46,365 INFO L225 Difference]: With dead ends: 926 [2022-01-31 17:30:46,365 INFO L226 Difference]: Without dead ends: 519 [2022-01-31 17:30:46,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:30:46,367 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1032 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:46,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1033 Valid, 53 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1120 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-31 17:30:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 517. [2022-01-31 17:30:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 511 states have (on average 1.0078277886497065) internal successors, (515), 511 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 520 transitions. [2022-01-31 17:30:46,487 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 520 transitions. Word has length 507 [2022-01-31 17:30:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:46,487 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 520 transitions. [2022-01-31 17:30:46,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 101 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 17:30:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 520 transitions. [2022-01-31 17:30:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-01-31 17:30:46,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:46,489 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:46,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:30:46,489 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:46,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:46,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2044088399, now seen corresponding path program 99 times [2022-01-31 17:30:46,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:46,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298874736] [2022-01-31 17:30:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:46,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:46,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:46,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:46,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:49,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:49,468 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 17:30:49,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298874736] [2022-01-31 17:30:49,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1298874736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:49,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:49,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:30:49,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500007581] [2022-01-31 17:30:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:49,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:30:49,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:30:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:30:49,471 INFO L87 Difference]: Start difference. First operand 517 states and 520 transitions. Second operand has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 102 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:54,435 INFO L93 Difference]: Finished difference Result 935 states and 943 transitions. [2022-01-31 17:30:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:30:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 102 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 512 [2022-01-31 17:30:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:54,437 INFO L225 Difference]: With dead ends: 935 [2022-01-31 17:30:54,437 INFO L226 Difference]: Without dead ends: 524 [2022-01-31 17:30:54,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:30:54,439 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:54,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 43 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:30:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-31 17:30:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2022-01-31 17:30:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 516 states have (on average 1.0077519379844961) internal successors, (520), 516 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 525 transitions. [2022-01-31 17:30:54,580 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 525 transitions. Word has length 512 [2022-01-31 17:30:54,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:54,580 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 525 transitions. [2022-01-31 17:30:54,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 102 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 525 transitions. [2022-01-31 17:30:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2022-01-31 17:30:54,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:54,582 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:54,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:30:54,582 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2090663625, now seen corresponding path program 100 times [2022-01-31 17:30:54,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:54,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942341395] [2022-01-31 17:30:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:54,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:54,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:54,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:54,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:57,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:57,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:57,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942341395] [2022-01-31 17:30:57,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [942341395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:57,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:57,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:30:57,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702433291] [2022-01-31 17:30:57,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:57,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:30:57,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:30:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:30:57,684 INFO L87 Difference]: Start difference. First operand 522 states and 525 transitions. Second operand has 104 states, 104 states have (on average 1.125) internal successors, (117), 103 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 17:31:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:02,838 INFO L93 Difference]: Finished difference Result 944 states and 952 transitions. [2022-01-31 17:31:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:31:02,838 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.125) internal successors, (117), 103 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 517 [2022-01-31 17:31:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:02,839 INFO L225 Difference]: With dead ends: 944 [2022-01-31 17:31:02,839 INFO L226 Difference]: Without dead ends: 529 [2022-01-31 17:31:02,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:31:02,841 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1040 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 1131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1131 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:02,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 58 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1131 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:31:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-31 17:31:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 527. [2022-01-31 17:31:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 521 states have (on average 1.0076775431861804) internal successors, (525), 521 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 530 transitions. [2022-01-31 17:31:02,985 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 530 transitions. Word has length 517 [2022-01-31 17:31:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:02,985 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 530 transitions. [2022-01-31 17:31:02,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.125) internal successors, (117), 103 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 17:31:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 530 transitions. [2022-01-31 17:31:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-01-31 17:31:02,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:02,987 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:31:02,987 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1478755143, now seen corresponding path program 101 times [2022-01-31 17:31:02,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511759361] [2022-01-31 17:31:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:02,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:02,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:02,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:03,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:06,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:06,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:06,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511759361] [2022-01-31 17:31:06,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511759361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:06,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:06,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:31:06,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403775551] [2022-01-31 17:31:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:06,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:31:06,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:31:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:31:06,120 INFO L87 Difference]: Start difference. First operand 527 states and 530 transitions. Second operand has 105 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 104 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:11,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:11,288 INFO L93 Difference]: Finished difference Result 953 states and 961 transitions. [2022-01-31 17:31:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:31:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 104 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 522 [2022-01-31 17:31:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:11,289 INFO L225 Difference]: With dead ends: 953 [2022-01-31 17:31:11,289 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 17:31:11,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:31:11,291 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1034 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 1125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1125 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:11,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 58 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1125 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:31:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 17:31:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2022-01-31 17:31:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 526 states have (on average 1.0076045627376427) internal successors, (530), 526 states have internal predecessors, (530), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 535 transitions. [2022-01-31 17:31:11,432 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 535 transitions. Word has length 522 [2022-01-31 17:31:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:11,432 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 535 transitions. [2022-01-31 17:31:11,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 104 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 535 transitions. [2022-01-31 17:31:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-01-31 17:31:11,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:11,434 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:11,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:31:11,434 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash -282898129, now seen corresponding path program 102 times [2022-01-31 17:31:11,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:11,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699238337] [2022-01-31 17:31:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:11,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:11,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:11,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:11,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:14,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:14,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699238337] [2022-01-31 17:31:14,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699238337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:14,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:14,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:31:14,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425929626] [2022-01-31 17:31:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:14,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:31:14,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:31:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:31:14,609 INFO L87 Difference]: Start difference. First operand 532 states and 535 transitions. Second operand has 106 states, 106 states have (on average 1.1226415094339623) internal successors, (119), 105 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 17:31:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:19,916 INFO L93 Difference]: Finished difference Result 962 states and 970 transitions. [2022-01-31 17:31:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:31:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.1226415094339623) internal successors, (119), 105 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 527 [2022-01-31 17:31:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:19,917 INFO L225 Difference]: With dead ends: 962 [2022-01-31 17:31:19,917 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 17:31:19,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:31:19,919 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1130 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:19,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 48 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:31:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 17:31:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 537. [2022-01-31 17:31:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 531 states have (on average 1.0075329566854991) internal successors, (535), 531 states have internal predecessors, (535), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 540 transitions. [2022-01-31 17:31:20,064 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 540 transitions. Word has length 527 [2022-01-31 17:31:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:20,064 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 540 transitions. [2022-01-31 17:31:20,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.1226415094339623) internal successors, (119), 105 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 17:31:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 540 transitions. [2022-01-31 17:31:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2022-01-31 17:31:20,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:20,066 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:20,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:31:20,066 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:20,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1464984001, now seen corresponding path program 103 times [2022-01-31 17:31:20,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:20,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600081712] [2022-01-31 17:31:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:20,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:20,067 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:20,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:20,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:23,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:23,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:23,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600081712] [2022-01-31 17:31:23,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [600081712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:23,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:23,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:31:23,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768855583] [2022-01-31 17:31:23,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:23,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:31:23,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:31:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:31:23,233 INFO L87 Difference]: Start difference. First operand 537 states and 540 transitions. Second operand has 107 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 106 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:28,730 INFO L93 Difference]: Finished difference Result 971 states and 979 transitions. [2022-01-31 17:31:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:31:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 106 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 532 [2022-01-31 17:31:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:28,731 INFO L225 Difference]: With dead ends: 971 [2022-01-31 17:31:28,731 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 17:31:28,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:31:28,733 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1210 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 1305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1305 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:28,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 38 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1305 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:31:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 17:31:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 542. [2022-01-31 17:31:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 536 states have (on average 1.007462686567164) internal successors, (540), 536 states have internal predecessors, (540), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 545 transitions. [2022-01-31 17:31:28,878 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 545 transitions. Word has length 532 [2022-01-31 17:31:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:28,878 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 545 transitions. [2022-01-31 17:31:28,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 106 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 545 transitions. [2022-01-31 17:31:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-01-31 17:31:28,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:28,881 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:28,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:31:28,881 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1360578855, now seen corresponding path program 104 times [2022-01-31 17:31:28,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:28,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031465829] [2022-01-31 17:31:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:28,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:28,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:28,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:28,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:32,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:32,122 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 17:31:32,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031465829] [2022-01-31 17:31:32,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031465829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:32,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:32,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:31:32,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368085742] [2022-01-31 17:31:32,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:32,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:31:32,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:31:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:31:32,125 INFO L87 Difference]: Start difference. First operand 542 states and 545 transitions. Second operand has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 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 17:31:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:37,587 INFO L93 Difference]: Finished difference Result 980 states and 988 transitions. [2022-01-31 17:31:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:31:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 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 537 [2022-01-31 17:31:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:37,588 INFO L225 Difference]: With dead ends: 980 [2022-01-31 17:31:37,588 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 17:31:37,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:31:37,590 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:37,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 48 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1220 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:31:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 17:31:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 547. [2022-01-31 17:31:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 541 states have (on average 1.0073937153419594) internal successors, (545), 541 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 550 transitions. [2022-01-31 17:31:37,725 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 550 transitions. Word has length 537 [2022-01-31 17:31:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:37,725 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 550 transitions. [2022-01-31 17:31:37,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 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 17:31:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 550 transitions. [2022-01-31 17:31:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-01-31 17:31:37,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:37,727 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:37,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:31:37,727 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1673223881, now seen corresponding path program 105 times [2022-01-31 17:31:37,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895030707] [2022-01-31 17:31:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:37,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:37,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:37,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:37,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:41,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:41,035 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895030707] [2022-01-31 17:31:41,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [895030707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:41,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:41,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:31:41,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869375640] [2022-01-31 17:31:41,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:41,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:31:41,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:31:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:31:41,038 INFO L87 Difference]: Start difference. First operand 547 states and 550 transitions. Second operand has 109 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 108 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:46,607 INFO L93 Difference]: Finished difference Result 989 states and 997 transitions. [2022-01-31 17:31:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:31:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 108 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 542 [2022-01-31 17:31:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:46,608 INFO L225 Difference]: With dead ends: 989 [2022-01-31 17:31:46,608 INFO L226 Difference]: Without dead ends: 554 [2022-01-31 17:31:46,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:31:46,610 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 982 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:46,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 68 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:31:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-31 17:31:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-01-31 17:31:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 546 states have (on average 1.0073260073260073) internal successors, (550), 546 states have internal predecessors, (550), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 555 transitions. [2022-01-31 17:31:46,747 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 555 transitions. Word has length 542 [2022-01-31 17:31:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:46,748 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 555 transitions. [2022-01-31 17:31:46,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 108 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 555 transitions. [2022-01-31 17:31:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-01-31 17:31:46,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:46,760 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:46,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:31:46,760 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1390188257, now seen corresponding path program 106 times [2022-01-31 17:31:46,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:46,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454571607] [2022-01-31 17:31:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:46,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:46,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:46,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:46,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:50,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454571607] [2022-01-31 17:31:50,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [454571607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:50,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:50,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:31:50,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907242250] [2022-01-31 17:31:50,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:50,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:31:50,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:31:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:31:50,091 INFO L87 Difference]: Start difference. First operand 552 states and 555 transitions. Second operand has 110 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 109 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 17:31:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:55,809 INFO L93 Difference]: Finished difference Result 998 states and 1006 transitions. [2022-01-31 17:31:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:31:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 109 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 547 [2022-01-31 17:31:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:55,810 INFO L225 Difference]: With dead ends: 998 [2022-01-31 17:31:55,810 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 17:31:55,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:31:55,812 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1118 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 1213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1213 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:55,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 43 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1213 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:31:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 17:31:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 557. [2022-01-31 17:31:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 551 states have (on average 1.0072595281306715) internal successors, (555), 551 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 560 transitions. [2022-01-31 17:31:55,948 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 560 transitions. Word has length 547 [2022-01-31 17:31:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 560 transitions. [2022-01-31 17:31:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 109 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 17:31:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 560 transitions. [2022-01-31 17:31:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-01-31 17:31:55,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:55,951 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:55,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:31:55,951 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash -440955857, now seen corresponding path program 107 times [2022-01-31 17:31:55,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732074641] [2022-01-31 17:31:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:55,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:55,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:55,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:55,967 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:59,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:59,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:59,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732074641] [2022-01-31 17:31:59,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732074641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:59,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:59,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:31:59,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318690974] [2022-01-31 17:31:59,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:59,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:31:59,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:31:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:31:59,359 INFO L87 Difference]: Start difference. First operand 557 states and 560 transitions. Second operand has 111 states, 111 states have (on average 1.117117117117117) internal successors, (124), 110 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:05,177 INFO L93 Difference]: Finished difference Result 1007 states and 1015 transitions. [2022-01-31 17:32:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:32:05,177 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.117117117117117) internal successors, (124), 110 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 552 [2022-01-31 17:32:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:05,178 INFO L225 Difference]: With dead ends: 1007 [2022-01-31 17:32:05,178 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 17:32:05,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:32:05,180 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 1351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1351 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:05,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1253 Valid, 48 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1351 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:32:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 17:32:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 562. [2022-01-31 17:32:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 556 states have (on average 1.0071942446043165) internal successors, (560), 556 states have internal predecessors, (560), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 565 transitions. [2022-01-31 17:32:05,338 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 565 transitions. Word has length 552 [2022-01-31 17:32:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:05,338 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 565 transitions. [2022-01-31 17:32:05,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.117117117117117) internal successors, (124), 110 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 565 transitions. [2022-01-31 17:32:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2022-01-31 17:32:05,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:05,340 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:05,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:32:05,340 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:05,341 INFO L85 PathProgramCache]: Analyzing trace with hash -182243049, now seen corresponding path program 108 times [2022-01-31 17:32:05,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:05,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626790689] [2022-01-31 17:32:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:05,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:05,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:05,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:05,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:08,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:08,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626790689] [2022-01-31 17:32:08,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [626790689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:08,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:08,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:32:08,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417959090] [2022-01-31 17:32:08,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:08,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:32:08,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:08,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:32:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:32:08,854 INFO L87 Difference]: Start difference. First operand 562 states and 565 transitions. Second operand has 112 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 111 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 17:32:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:14,859 INFO L93 Difference]: Finished difference Result 1016 states and 1024 transitions. [2022-01-31 17:32:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:32:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 111 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 557 [2022-01-31 17:32:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:14,860 INFO L225 Difference]: With dead ends: 1016 [2022-01-31 17:32:14,860 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 17:32:14,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:32:14,862 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1440 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 1535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1535 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:14,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1441 Valid, 33 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1535 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:32:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 17:32:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 567. [2022-01-31 17:32:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 561 states have (on average 1.0071301247771836) internal successors, (565), 561 states have internal predecessors, (565), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 570 transitions. [2022-01-31 17:32:15,004 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 570 transitions. Word has length 557 [2022-01-31 17:32:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:15,004 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 570 transitions. [2022-01-31 17:32:15,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 111 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 17:32:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 570 transitions. [2022-01-31 17:32:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2022-01-31 17:32:15,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:15,007 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:15,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:32:15,007 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash 970383143, now seen corresponding path program 109 times [2022-01-31 17:32:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:15,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870328506] [2022-01-31 17:32:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:15,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:15,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:15,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:15,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:18,530 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870328506] [2022-01-31 17:32:18,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870328506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:18,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:18,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:32:18,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735944540] [2022-01-31 17:32:18,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:18,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:32:18,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:32:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:32:18,533 INFO L87 Difference]: Start difference. First operand 567 states and 570 transitions. Second operand has 113 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 112 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:24,568 INFO L93 Difference]: Finished difference Result 1025 states and 1033 transitions. [2022-01-31 17:32:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:32:24,568 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 112 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 562 [2022-01-31 17:32:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:24,569 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 17:32:24,569 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 17:32:24,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:32:24,571 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1244 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 1342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1342 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:24,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 38 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1342 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:32:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 17:32:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 572. [2022-01-31 17:32:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 566 states have (on average 1.0070671378091873) internal successors, (570), 566 states have internal predecessors, (570), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 575 transitions. [2022-01-31 17:32:24,718 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 575 transitions. Word has length 562 [2022-01-31 17:32:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 575 transitions. [2022-01-31 17:32:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 112 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 575 transitions. [2022-01-31 17:32:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 17:32:24,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:24,721 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:24,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:32:24,721 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1997004529, now seen corresponding path program 110 times [2022-01-31 17:32:24,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:24,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246329744] [2022-01-31 17:32:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:24,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:24,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:24,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:24,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:28,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:28,298 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 17:32:28,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:28,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246329744] [2022-01-31 17:32:28,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [246329744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:28,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:28,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:32:28,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385819126] [2022-01-31 17:32:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:28,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:32:28,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:32:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:32:28,302 INFO L87 Difference]: Start difference. First operand 572 states and 575 transitions. Second operand has 114 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 113 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 17:32:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:34,511 INFO L93 Difference]: Finished difference Result 1034 states and 1042 transitions. [2022-01-31 17:32:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:32:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 113 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 567 [2022-01-31 17:32:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:34,513 INFO L225 Difference]: With dead ends: 1034 [2022-01-31 17:32:34,513 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 17:32:34,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:32:34,515 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1442 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:34,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 43 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:32:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 17:32:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 577. [2022-01-31 17:32:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 571 states have (on average 1.0070052539404553) internal successors, (575), 571 states have internal predecessors, (575), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 580 transitions. [2022-01-31 17:32:34,679 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 580 transitions. Word has length 567 [2022-01-31 17:32:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:34,679 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 580 transitions. [2022-01-31 17:32:34,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 113 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 17:32:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 580 transitions. [2022-01-31 17:32:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-01-31 17:32:34,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:34,681 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:34,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:32:34,681 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -814573025, now seen corresponding path program 111 times [2022-01-31 17:32:34,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:34,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995134014] [2022-01-31 17:32:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:34,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:34,682 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:34,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:34,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:38,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:38,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995134014] [2022-01-31 17:32:38,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995134014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:38,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:38,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:32:38,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123214222] [2022-01-31 17:32:38,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:38,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:32:38,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:38,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:32:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:32:38,356 INFO L87 Difference]: Start difference. First operand 577 states and 580 transitions. Second operand has 115 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 114 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:44,708 INFO L93 Difference]: Finished difference Result 1043 states and 1051 transitions. [2022-01-31 17:32:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:32:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 114 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 572 [2022-01-31 17:32:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:44,709 INFO L225 Difference]: With dead ends: 1043 [2022-01-31 17:32:44,709 INFO L226 Difference]: Without dead ends: 584 [2022-01-31 17:32:44,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:32:44,712 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1084 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:44,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 53 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:32:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-31 17:32:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2022-01-31 17:32:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 576 states have (on average 1.0069444444444444) internal successors, (580), 576 states have internal predecessors, (580), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 585 transitions. [2022-01-31 17:32:44,876 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 585 transitions. Word has length 572 [2022-01-31 17:32:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:44,876 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 585 transitions. [2022-01-31 17:32:44,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 114 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 585 transitions. [2022-01-31 17:32:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2022-01-31 17:32:44,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:44,878 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:44,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:32:44,879 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1232979705, now seen corresponding path program 112 times [2022-01-31 17:32:44,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16905416] [2022-01-31 17:32:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:44,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:44,880 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:44,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:44,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:48,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:48,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:48,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16905416] [2022-01-31 17:32:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16905416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:48,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:48,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:32:48,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592191976] [2022-01-31 17:32:48,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:48,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:32:48,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:32:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:32:48,619 INFO L87 Difference]: Start difference. First operand 582 states and 585 transitions. Second operand has 116 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 115 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 17:32:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:55,000 INFO L93 Difference]: Finished difference Result 1052 states and 1060 transitions. [2022-01-31 17:32:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:32:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 115 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 577 [2022-01-31 17:32:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:55,001 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 17:32:55,001 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 17:32:55,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:32:55,003 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1170 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:55,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1171 Valid, 43 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:32:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 17:32:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2022-01-31 17:32:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 581 states have (on average 1.0068846815834767) internal successors, (585), 581 states have internal predecessors, (585), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 590 transitions. [2022-01-31 17:32:55,157 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 590 transitions. Word has length 577 [2022-01-31 17:32:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:55,157 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 590 transitions. [2022-01-31 17:32:55,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 115 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 17:32:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 590 transitions. [2022-01-31 17:32:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 17:32:55,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:55,160 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:55,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:32:55,160 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -547701481, now seen corresponding path program 113 times [2022-01-31 17:32:55,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:55,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15520155] [2022-01-31 17:32:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:55,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:55,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:55,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:55,180 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:58,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:58,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15520155] [2022-01-31 17:32:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [15520155] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:58,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:58,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:32:58,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664112160] [2022-01-31 17:32:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:58,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:32:58,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:32:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:32:58,968 INFO L87 Difference]: Start difference. First operand 587 states and 590 transitions. Second operand has 117 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 116 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:05,465 INFO L93 Difference]: Finished difference Result 1061 states and 1069 transitions. [2022-01-31 17:33:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:33:05,466 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 116 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2022-01-31 17:33:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:05,466 INFO L225 Difference]: With dead ends: 1061 [2022-01-31 17:33:05,466 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 17:33:05,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:33:05,468 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1360 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:05,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 38 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:33:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 17:33:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 592. [2022-01-31 17:33:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 586 states have (on average 1.006825938566553) internal successors, (590), 586 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 595 transitions. [2022-01-31 17:33:05,643 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 595 transitions. Word has length 582 [2022-01-31 17:33:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:05,644 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 595 transitions. [2022-01-31 17:33:05,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 116 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 595 transitions. [2022-01-31 17:33:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-01-31 17:33:05,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:05,646 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:05,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:33:05,646 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:05,647 INFO L85 PathProgramCache]: Analyzing trace with hash 966883583, now seen corresponding path program 114 times [2022-01-31 17:33:05,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:05,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091038515] [2022-01-31 17:33:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:05,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:05,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:05,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:05,666 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:09,517 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:09,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091038515] [2022-01-31 17:33:09,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091038515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:09,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:09,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:33:09,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572670952] [2022-01-31 17:33:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:09,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:33:09,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:33:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:33:09,520 INFO L87 Difference]: Start difference. First operand 592 states and 595 transitions. Second operand has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 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 17:33:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:16,127 INFO L93 Difference]: Finished difference Result 1070 states and 1078 transitions. [2022-01-31 17:33:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:33:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 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 587 [2022-01-31 17:33:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:16,129 INFO L225 Difference]: With dead ends: 1070 [2022-01-31 17:33:16,129 INFO L226 Difference]: Without dead ends: 599 [2022-01-31 17:33:16,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:33:16,131 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1500 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:16,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 48 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:33:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-31 17:33:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2022-01-31 17:33:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 591 states have (on average 1.0067681895093064) internal successors, (595), 591 states have internal predecessors, (595), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 600 transitions. [2022-01-31 17:33:16,293 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 600 transitions. Word has length 587 [2022-01-31 17:33:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:16,293 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 600 transitions. [2022-01-31 17:33:16,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 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 17:33:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 600 transitions. [2022-01-31 17:33:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2022-01-31 17:33:16,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:16,295 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:16,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:33:16,295 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 610224143, now seen corresponding path program 115 times [2022-01-31 17:33:16,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363364503] [2022-01-31 17:33:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:16,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:16,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:16,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:16,322 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:20,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:20,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363364503] [2022-01-31 17:33:20,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1363364503] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:20,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:20,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:33:20,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008811516] [2022-01-31 17:33:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:20,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:33:20,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:33:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:33:20,244 INFO L87 Difference]: Start difference. First operand 597 states and 600 transitions. Second operand has 119 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 118 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:27,081 INFO L93 Difference]: Finished difference Result 1079 states and 1087 transitions. [2022-01-31 17:33:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:33:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 118 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 592 [2022-01-31 17:33:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:27,082 INFO L225 Difference]: With dead ends: 1079 [2022-01-31 17:33:27,082 INFO L226 Difference]: Without dead ends: 604 [2022-01-31 17:33:27,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:33:27,084 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1172 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 1280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1280 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:27,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 63 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1280 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:33:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-31 17:33:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2022-01-31 17:33:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 596 states have (on average 1.0067114093959733) internal successors, (600), 596 states have internal predecessors, (600), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 605 transitions. [2022-01-31 17:33:27,248 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 605 transitions. Word has length 592 [2022-01-31 17:33:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:27,248 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 605 transitions. [2022-01-31 17:33:27,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 118 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 605 transitions. [2022-01-31 17:33:27,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-01-31 17:33:27,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:27,250 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:27,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:33:27,250 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1137319689, now seen corresponding path program 116 times [2022-01-31 17:33:27,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:27,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917413474] [2022-01-31 17:33:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:27,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:27,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:27,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:27,271 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:31,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:31,244 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 17:33:31,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917413474] [2022-01-31 17:33:31,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [917413474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:31,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:31,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:33:31,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180622894] [2022-01-31 17:33:31,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:31,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:33:31,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:33:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:33:31,248 INFO L87 Difference]: Start difference. First operand 602 states and 605 transitions. Second operand has 120 states, 120 states have (on average 1.1083333333333334) internal successors, (133), 119 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 17:33:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:38,251 INFO L93 Difference]: Finished difference Result 1088 states and 1096 transitions. [2022-01-31 17:33:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:33:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.1083333333333334) internal successors, (133), 119 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 597 [2022-01-31 17:33:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:38,252 INFO L225 Difference]: With dead ends: 1088 [2022-01-31 17:33:38,253 INFO L226 Difference]: Without dead ends: 609 [2022-01-31 17:33:38,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:33:38,255 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1300 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1408 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:38,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 48 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1408 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:33:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-31 17:33:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 607. [2022-01-31 17:33:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 601 states have (on average 1.0066555740432612) internal successors, (605), 601 states have internal predecessors, (605), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 610 transitions. [2022-01-31 17:33:38,419 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 610 transitions. Word has length 597 [2022-01-31 17:33:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:38,419 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 610 transitions. [2022-01-31 17:33:38,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.1083333333333334) internal successors, (133), 119 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 17:33:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 610 transitions. [2022-01-31 17:33:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2022-01-31 17:33:38,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:38,422 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:38,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:33:38,422 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1531984647, now seen corresponding path program 117 times [2022-01-31 17:33:38,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:38,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766996262] [2022-01-31 17:33:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:38,423 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:38,423 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:38,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:38,442 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:42,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:42,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:42,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766996262] [2022-01-31 17:33:42,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [766996262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:42,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:42,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:33:42,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142666983] [2022-01-31 17:33:42,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:42,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:33:42,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:33:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:33:42,509 INFO L87 Difference]: Start difference. First operand 607 states and 610 transitions. Second operand has 121 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 120 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:49,617 INFO L93 Difference]: Finished difference Result 1097 states and 1105 transitions. [2022-01-31 17:33:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:33:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 120 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 602 [2022-01-31 17:33:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:49,618 INFO L225 Difference]: With dead ends: 1097 [2022-01-31 17:33:49,618 INFO L226 Difference]: Without dead ends: 614 [2022-01-31 17:33:49,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:33:49,620 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1106 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 1215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1215 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:49,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 73 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1215 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:33:49,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-31 17:33:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 612. [2022-01-31 17:33:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.0066006600660067) internal successors, (610), 606 states have internal predecessors, (610), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 615 transitions. [2022-01-31 17:33:49,788 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 615 transitions. Word has length 602 [2022-01-31 17:33:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:49,788 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 615 transitions. [2022-01-31 17:33:49,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 120 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 615 transitions. [2022-01-31 17:33:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2022-01-31 17:33:49,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:49,791 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:49,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:33:49,791 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1444901103, now seen corresponding path program 118 times [2022-01-31 17:33:49,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:49,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425497596] [2022-01-31 17:33:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:49,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:49,792 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:49,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:49,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:53,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425497596] [2022-01-31 17:33:53,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [425497596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:53,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:53,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:33:53,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055111401] [2022-01-31 17:33:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:53,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:33:53,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:33:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:33:53,954 INFO L87 Difference]: Start difference. First operand 612 states and 615 transitions. Second operand has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 121 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 17:34:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:01,229 INFO L93 Difference]: Finished difference Result 1106 states and 1114 transitions. [2022-01-31 17:34:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:34:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 121 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 607 [2022-01-31 17:34:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:01,245 INFO L225 Difference]: With dead ends: 1106 [2022-01-31 17:34:01,245 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 17:34:01,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:34:01,247 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1408 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 1515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1515 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:01,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 48 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1515 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:34:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 17:34:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2022-01-31 17:34:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 611 states have (on average 1.0065466448445173) internal successors, (615), 611 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 620 transitions. [2022-01-31 17:34:01,417 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 620 transitions. Word has length 607 [2022-01-31 17:34:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:01,417 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 620 transitions. [2022-01-31 17:34:01,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 121 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 17:34:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 620 transitions. [2022-01-31 17:34:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-01-31 17:34:01,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:01,419 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:01,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:34:01,420 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1023568385, now seen corresponding path program 119 times [2022-01-31 17:34:01,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507325507] [2022-01-31 17:34:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:01,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:01,421 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:01,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:01,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:05,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:05,645 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507325507] [2022-01-31 17:34:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507325507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:05,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:05,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:34:05,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317238727] [2022-01-31 17:34:05,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:05,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:34:05,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:34:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:34:05,649 INFO L87 Difference]: Start difference. First operand 617 states and 620 transitions. Second operand has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 122 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:13,194 INFO L93 Difference]: Finished difference Result 1115 states and 1123 transitions. [2022-01-31 17:34:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:34:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 122 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 612 [2022-01-31 17:34:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:13,195 INFO L225 Difference]: With dead ends: 1115 [2022-01-31 17:34:13,195 INFO L226 Difference]: Without dead ends: 624 [2022-01-31 17:34:13,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:34:13,197 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1288 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 1399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1399 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:13,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 53 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1399 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:34:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-31 17:34:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 622. [2022-01-31 17:34:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 616 states have (on average 1.0064935064935066) internal successors, (620), 616 states have internal predecessors, (620), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 625 transitions. [2022-01-31 17:34:13,383 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 625 transitions. Word has length 612 [2022-01-31 17:34:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:13,383 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 625 transitions. [2022-01-31 17:34:13,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 122 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 625 transitions. [2022-01-31 17:34:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 17:34:13,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:13,385 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:13,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:34:13,386 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 222177511, now seen corresponding path program 120 times [2022-01-31 17:34:13,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:13,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045919220] [2022-01-31 17:34:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:13,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:13,387 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:13,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:13,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:17,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:17,649 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 17:34:17,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:17,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045919220] [2022-01-31 17:34:17,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045919220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:17,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:17,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:34:17,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732018724] [2022-01-31 17:34:17,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:17,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:34:17,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:34:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:34:17,652 INFO L87 Difference]: Start difference. First operand 622 states and 625 transitions. Second operand has 124 states, 124 states have (on average 1.1048387096774193) internal successors, (137), 123 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 17:34:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:25,214 INFO L93 Difference]: Finished difference Result 1124 states and 1132 transitions. [2022-01-31 17:34:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:34:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1048387096774193) internal successors, (137), 123 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 617 [2022-01-31 17:34:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:25,215 INFO L225 Difference]: With dead ends: 1124 [2022-01-31 17:34:25,215 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 17:34:25,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:34:25,217 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1250 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 1357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1357 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:25,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 53 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1357 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:34:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 17:34:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 627. [2022-01-31 17:34:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 621 states have (on average 1.0064412238325282) internal successors, (625), 621 states have internal predecessors, (625), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 630 transitions. [2022-01-31 17:34:25,411 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 630 transitions. Word has length 617 [2022-01-31 17:34:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:25,411 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 630 transitions. [2022-01-31 17:34:25,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1048387096774193) internal successors, (137), 123 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 17:34:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 630 transitions. [2022-01-31 17:34:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-01-31 17:34:25,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:25,413 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:25,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:34:25,414 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1674094345, now seen corresponding path program 121 times [2022-01-31 17:34:25,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:25,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491659719] [2022-01-31 17:34:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:25,415 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:25,415 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:25,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:25,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:29,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:29,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491659719] [2022-01-31 17:34:29,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491659719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:29,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:29,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:34:29,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179318857] [2022-01-31 17:34:29,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:29,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:34:29,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:34:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:34:29,770 INFO L87 Difference]: Start difference. First operand 627 states and 630 transitions. Second operand has 125 states, 125 states have (on average 1.104) internal successors, (138), 124 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:37,355 INFO L93 Difference]: Finished difference Result 1133 states and 1141 transitions. [2022-01-31 17:34:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:34:37,355 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.104) internal successors, (138), 124 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 622 [2022-01-31 17:34:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:37,356 INFO L225 Difference]: With dead ends: 1133 [2022-01-31 17:34:37,356 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 17:34:37,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:34:37,358 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1408 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:37,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 53 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1521 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:34:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 17:34:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 632. [2022-01-31 17:34:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 626 states have (on average 1.0063897763578276) internal successors, (630), 626 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 635 transitions. [2022-01-31 17:34:37,552 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 635 transitions. Word has length 622 [2022-01-31 17:34:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:37,552 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 635 transitions. [2022-01-31 17:34:37,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.104) internal successors, (138), 124 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 635 transitions. [2022-01-31 17:34:37,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:34:37,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:37,555 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:37,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:34:37,555 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:37,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1433536735, now seen corresponding path program 122 times [2022-01-31 17:34:37,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:37,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410514007] [2022-01-31 17:34:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:37,556 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:37,556 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:37,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:37,577 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:42,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:42,018 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:42,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410514007] [2022-01-31 17:34:42,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410514007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:42,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:42,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:34:42,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580479506] [2022-01-31 17:34:42,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:42,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:34:42,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:34:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:34:42,021 INFO L87 Difference]: Start difference. First operand 632 states and 635 transitions. Second operand has 126 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 125 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 17:34:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:50,064 INFO L93 Difference]: Finished difference Result 1142 states and 1150 transitions. [2022-01-31 17:34:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:34:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 125 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 627 [2022-01-31 17:34:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:50,065 INFO L225 Difference]: With dead ends: 1142 [2022-01-31 17:34:50,065 INFO L226 Difference]: Without dead ends: 639 [2022-01-31 17:34:50,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:34:50,068 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1218 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 1331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1331 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:50,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 68 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1331 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:34:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-31 17:34:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2022-01-31 17:34:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 631 states have (on average 1.006339144215531) internal successors, (635), 631 states have internal predecessors, (635), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 640 transitions. [2022-01-31 17:34:50,251 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 640 transitions. Word has length 627 [2022-01-31 17:34:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 640 transitions. [2022-01-31 17:34:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1031746031746033) internal successors, (139), 125 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 17:34:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 640 transitions. [2022-01-31 17:34:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2022-01-31 17:34:50,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:50,254 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:50,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:34:50,254 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1446149137, now seen corresponding path program 123 times [2022-01-31 17:34:50,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:50,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188633834] [2022-01-31 17:34:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:50,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:50,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:50,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:50,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:54,767 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188633834] [2022-01-31 17:34:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [188633834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:54,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:54,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:34:54,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753986730] [2022-01-31 17:34:54,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:54,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:34:54,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:34:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:34:54,770 INFO L87 Difference]: Start difference. First operand 637 states and 640 transitions. Second operand has 127 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 126 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:02,725 INFO L93 Difference]: Finished difference Result 1151 states and 1159 transitions. [2022-01-31 17:35:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:35:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 126 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 632 [2022-01-31 17:35:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:02,726 INFO L225 Difference]: With dead ends: 1151 [2022-01-31 17:35:02,727 INFO L226 Difference]: Without dead ends: 644 [2022-01-31 17:35:02,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:35:02,729 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 1381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1381 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:02,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1267 Valid, 53 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1381 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:35:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-31 17:35:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2022-01-31 17:35:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 636 states have (on average 1.0062893081761006) internal successors, (640), 636 states have internal predecessors, (640), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 645 transitions. [2022-01-31 17:35:02,930 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 645 transitions. Word has length 632 [2022-01-31 17:35:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:02,931 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 645 transitions. [2022-01-31 17:35:02,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 126 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 645 transitions. [2022-01-31 17:35:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2022-01-31 17:35:02,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:02,933 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:02,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:35:02,934 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1868885801, now seen corresponding path program 124 times [2022-01-31 17:35:02,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:02,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176419193] [2022-01-31 17:35:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:02,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:02,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:02,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:02,959 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:07,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:07,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176419193] [2022-01-31 17:35:07,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176419193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:07,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:07,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:35:07,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043039617] [2022-01-31 17:35:07,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:07,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:35:07,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:35:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:35:07,489 INFO L87 Difference]: Start difference. First operand 642 states and 645 transitions. Second operand has 128 states, 128 states have (on average 1.1015625) internal successors, (141), 127 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 17:35:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:15,574 INFO L93 Difference]: Finished difference Result 1160 states and 1168 transitions. [2022-01-31 17:35:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:35:15,574 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1015625) internal successors, (141), 127 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 637 [2022-01-31 17:35:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:15,575 INFO L225 Difference]: With dead ends: 1160 [2022-01-31 17:35:15,575 INFO L226 Difference]: Without dead ends: 649 [2022-01-31 17:35:15,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:35:15,578 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1592 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:15,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 43 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:35:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-31 17:35:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2022-01-31 17:35:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 641 states have (on average 1.0062402496099845) internal successors, (645), 641 states have internal predecessors, (645), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 650 transitions. [2022-01-31 17:35:15,765 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 650 transitions. Word has length 637 [2022-01-31 17:35:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 650 transitions. [2022-01-31 17:35:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1015625) internal successors, (141), 127 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 17:35:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 650 transitions. [2022-01-31 17:35:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2022-01-31 17:35:15,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:15,768 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:15,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:35:15,769 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1332734233, now seen corresponding path program 125 times [2022-01-31 17:35:15,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:15,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040182472] [2022-01-31 17:35:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:15,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:15,770 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:15,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:15,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:20,453 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:20,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040182472] [2022-01-31 17:35:20,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040182472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:20,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:20,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:35:20,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515666280] [2022-01-31 17:35:20,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:20,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:35:20,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:20,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:35:20,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:35:20,455 INFO L87 Difference]: Start difference. First operand 647 states and 650 transitions. Second operand has 129 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 128 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:28,676 INFO L93 Difference]: Finished difference Result 1169 states and 1177 transitions. [2022-01-31 17:35:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:35:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 128 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 642 [2022-01-31 17:35:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:28,677 INFO L225 Difference]: With dead ends: 1169 [2022-01-31 17:35:28,677 INFO L226 Difference]: Without dead ends: 654 [2022-01-31 17:35:28,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:35:28,680 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1244 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 1359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1359 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:28,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 53 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1359 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:35:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-31 17:35:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 652. [2022-01-31 17:35:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 646 states have (on average 1.0061919504643964) internal successors, (650), 646 states have internal predecessors, (650), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 655 transitions. [2022-01-31 17:35:28,923 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 655 transitions. Word has length 642 [2022-01-31 17:35:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:28,923 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 655 transitions. [2022-01-31 17:35:28,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 128 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 655 transitions. [2022-01-31 17:35:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2022-01-31 17:35:28,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:28,926 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:28,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:35:28,926 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1902559025, now seen corresponding path program 126 times [2022-01-31 17:35:28,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:28,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839879305] [2022-01-31 17:35:28,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:28,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:28,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:28,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:28,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:33,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:33,652 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:33,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839879305] [2022-01-31 17:35:33,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [839879305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:33,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:33,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:35:33,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454818005] [2022-01-31 17:35:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:33,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:35:33,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:35:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:35:33,657 INFO L87 Difference]: Start difference. First operand 652 states and 655 transitions. Second operand has 130 states, 130 states have (on average 1.1) internal successors, (143), 129 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 17:35:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:42,108 INFO L93 Difference]: Finished difference Result 1178 states and 1186 transitions. [2022-01-31 17:35:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:35:42,108 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.1) internal successors, (143), 129 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 647 [2022-01-31 17:35:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:42,109 INFO L225 Difference]: With dead ends: 1178 [2022-01-31 17:35:42,109 INFO L226 Difference]: Without dead ends: 659 [2022-01-31 17:35:42,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:35:42,112 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1512 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 1631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1631 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 53 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1631 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:35:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-31 17:35:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 657. [2022-01-31 17:35:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 651 states have (on average 1.0061443932411673) internal successors, (655), 651 states have internal predecessors, (655), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 660 transitions. [2022-01-31 17:35:42,307 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 660 transitions. Word has length 647 [2022-01-31 17:35:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:42,308 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 660 transitions. [2022-01-31 17:35:42,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.1) internal successors, (143), 129 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 17:35:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 660 transitions. [2022-01-31 17:35:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2022-01-31 17:35:42,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:42,311 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:35:42,311 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:42,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -145813025, now seen corresponding path program 127 times [2022-01-31 17:35:42,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:42,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627906030] [2022-01-31 17:35:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:42,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:42,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:42,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:42,348 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:47,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:47,122 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 17:35:47,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627906030] [2022-01-31 17:35:47,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [627906030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:47,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:47,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:35:47,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695124507] [2022-01-31 17:35:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:47,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:35:47,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:35:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:35:47,125 INFO L87 Difference]: Start difference. First operand 657 states and 660 transitions. Second operand has 131 states, 131 states have (on average 1.099236641221374) internal successors, (144), 130 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:55,734 INFO L93 Difference]: Finished difference Result 1187 states and 1195 transitions. [2022-01-31 17:35:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:35:55,735 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.099236641221374) internal successors, (144), 130 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 652 [2022-01-31 17:35:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:55,736 INFO L225 Difference]: With dead ends: 1187 [2022-01-31 17:35:55,736 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 17:35:55,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:35:55,738 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1436 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1552 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:55,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 48 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1552 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:35:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 17:35:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2022-01-31 17:35:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 656 states have (on average 1.0060975609756098) internal successors, (660), 656 states have internal predecessors, (660), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 665 transitions. [2022-01-31 17:35:55,935 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 665 transitions. Word has length 652 [2022-01-31 17:35:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:55,936 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 665 transitions. [2022-01-31 17:35:55,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.099236641221374) internal successors, (144), 130 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 665 transitions. [2022-01-31 17:35:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2022-01-31 17:35:55,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:55,939 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:55,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:35:55,939 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:55,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash 223123655, now seen corresponding path program 128 times [2022-01-31 17:35:55,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:55,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399895358] [2022-01-31 17:35:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:55,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:55,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:55,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:55,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:00,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:00,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399895358] [2022-01-31 17:36:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399895358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:00,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:00,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:36:00,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527120558] [2022-01-31 17:36:00,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:00,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:36:00,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:36:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:36:00,815 INFO L87 Difference]: Start difference. First operand 662 states and 665 transitions. Second operand has 132 states, 132 states have (on average 1.0984848484848484) internal successors, (145), 131 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 17:36:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:09,505 INFO L93 Difference]: Finished difference Result 1196 states and 1204 transitions. [2022-01-31 17:36:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:36:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.0984848484848484) internal successors, (145), 131 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 657 [2022-01-31 17:36:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:09,506 INFO L225 Difference]: With dead ends: 1196 [2022-01-31 17:36:09,506 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 17:36:09,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:36:09,509 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1428 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 1545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1545 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:09,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 48 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1545 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:36:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 17:36:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2022-01-31 17:36:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 661 states have (on average 1.006051437216339) internal successors, (665), 661 states have internal predecessors, (665), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 670 transitions. [2022-01-31 17:36:09,721 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 670 transitions. Word has length 657 [2022-01-31 17:36:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:09,721 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 670 transitions. [2022-01-31 17:36:09,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.0984848484848484) internal successors, (145), 131 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 17:36:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 670 transitions. [2022-01-31 17:36:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-01-31 17:36:09,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:09,724 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:09,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:36:09,725 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -958761769, now seen corresponding path program 129 times [2022-01-31 17:36:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804322402] [2022-01-31 17:36:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:09,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:09,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:09,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:09,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:14,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:14,623 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:14,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804322402] [2022-01-31 17:36:14,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [804322402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:14,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:14,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:36:14,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935129153] [2022-01-31 17:36:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:14,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:36:14,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:36:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:36:14,626 INFO L87 Difference]: Start difference. First operand 667 states and 670 transitions. Second operand has 133 states, 133 states have (on average 1.0977443609022557) internal successors, (146), 132 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:23,628 INFO L93 Difference]: Finished difference Result 1205 states and 1213 transitions. [2022-01-31 17:36:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:36:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0977443609022557) internal successors, (146), 132 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 662 [2022-01-31 17:36:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:23,629 INFO L225 Difference]: With dead ends: 1205 [2022-01-31 17:36:23,630 INFO L226 Difference]: Without dead ends: 674 [2022-01-31 17:36:23,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:36:23,632 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1506 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 1628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1628 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:23,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 58 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1628 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:36:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-31 17:36:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2022-01-31 17:36:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 666 states have (on average 1.006006006006006) internal successors, (670), 666 states have internal predecessors, (670), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 675 transitions. [2022-01-31 17:36:23,857 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 675 transitions. Word has length 662 [2022-01-31 17:36:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:23,857 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 675 transitions. [2022-01-31 17:36:23,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0977443609022557) internal successors, (146), 132 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 675 transitions. [2022-01-31 17:36:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2022-01-31 17:36:23,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:23,861 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:23,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:36:23,861 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 949295295, now seen corresponding path program 130 times [2022-01-31 17:36:23,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:23,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514249220] [2022-01-31 17:36:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:23,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:23,862 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:23,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:23,888 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:28,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:28,847 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:28,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514249220] [2022-01-31 17:36:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [514249220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:28,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:28,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:36:28,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454757935] [2022-01-31 17:36:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:28,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:36:28,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:36:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:36:28,851 INFO L87 Difference]: Start difference. First operand 672 states and 675 transitions. Second operand has 134 states, 134 states have (on average 1.0970149253731343) internal successors, (147), 133 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 17:36:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:38,080 INFO L93 Difference]: Finished difference Result 1214 states and 1222 transitions. [2022-01-31 17:36:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:36:38,080 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.0970149253731343) internal successors, (147), 133 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 667 [2022-01-31 17:36:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:38,081 INFO L225 Difference]: With dead ends: 1214 [2022-01-31 17:36:38,081 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 17:36:38,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:36:38,084 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1642 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 1767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1767 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:38,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1643 Valid, 43 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1767 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:36:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 17:36:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2022-01-31 17:36:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 671 states have (on average 1.0059612518628913) internal successors, (675), 671 states have internal predecessors, (675), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 680 transitions. [2022-01-31 17:36:38,308 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 680 transitions. Word has length 667 [2022-01-31 17:36:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:38,308 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 680 transitions. [2022-01-31 17:36:38,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.0970149253731343) internal successors, (147), 133 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 17:36:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 680 transitions. [2022-01-31 17:36:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2022-01-31 17:36:38,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:38,311 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:38,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:36:38,311 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash -368951345, now seen corresponding path program 131 times [2022-01-31 17:36:38,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:38,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576452070] [2022-01-31 17:36:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:38,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:38,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:38,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:38,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:43,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:43,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:43,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576452070] [2022-01-31 17:36:43,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576452070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:43,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:43,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:36:43,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663963860] [2022-01-31 17:36:43,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:43,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:36:43,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:36:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:36:43,372 INFO L87 Difference]: Start difference. First operand 677 states and 680 transitions. Second operand has 135 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 134 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:52,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:52,676 INFO L93 Difference]: Finished difference Result 1223 states and 1231 transitions. [2022-01-31 17:36:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:36:52,676 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 134 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 672 [2022-01-31 17:36:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:52,677 INFO L225 Difference]: With dead ends: 1223 [2022-01-31 17:36:52,677 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 17:36:52,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:36:52,680 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1588 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 1711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1711 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:52,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 38 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1711 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:36:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 17:36:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 682. [2022-01-31 17:36:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 676 states have (on average 1.0059171597633136) internal successors, (680), 676 states have internal predecessors, (680), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 685 transitions. [2022-01-31 17:36:52,895 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 685 transitions. Word has length 672 [2022-01-31 17:36:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 685 transitions. [2022-01-31 17:36:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 134 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 685 transitions. [2022-01-31 17:36:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2022-01-31 17:36:52,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:52,898 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:52,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:36:52,899 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash 710066359, now seen corresponding path program 132 times [2022-01-31 17:36:52,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:52,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034679895] [2022-01-31 17:36:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:52,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:52,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:52,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:52,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:58,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:58,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034679895] [2022-01-31 17:36:58,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034679895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:58,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:58,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:36:58,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159001186] [2022-01-31 17:36:58,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:58,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:36:58,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:36:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:36:58,089 INFO L87 Difference]: Start difference. First operand 682 states and 685 transitions. Second operand has 136 states, 136 states have (on average 1.0955882352941178) internal successors, (149), 135 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 17:37:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:07,867 INFO L93 Difference]: Finished difference Result 1232 states and 1240 transitions. [2022-01-31 17:37:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:37:07,867 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.0955882352941178) internal successors, (149), 135 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 677 [2022-01-31 17:37:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:07,868 INFO L225 Difference]: With dead ends: 1232 [2022-01-31 17:37:07,868 INFO L226 Difference]: Without dead ends: 689 [2022-01-31 17:37:07,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:37:07,871 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1456 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 1575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1575 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:07,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 53 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1575 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:37:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-31 17:37:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 687. [2022-01-31 17:37:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 681 states have (on average 1.0058737151248165) internal successors, (685), 681 states have internal predecessors, (685), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 690 transitions. [2022-01-31 17:37:08,107 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 690 transitions. Word has length 677 [2022-01-31 17:37:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:08,108 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 690 transitions. [2022-01-31 17:37:08,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.0955882352941178) internal successors, (149), 135 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 17:37:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 690 transitions. [2022-01-31 17:37:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2022-01-31 17:37:08,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:08,111 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:08,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:37:08,111 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash 764834503, now seen corresponding path program 133 times [2022-01-31 17:37:08,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:08,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442189289] [2022-01-31 17:37:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:08,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:08,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:08,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:08,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:13,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:13,450 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:13,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442189289] [2022-01-31 17:37:13,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1442189289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:13,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:13,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:37:13,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431647915] [2022-01-31 17:37:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:13,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:37:13,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:37:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:37:13,455 INFO L87 Difference]: Start difference. First operand 687 states and 690 transitions. Second operand has 137 states, 137 states have (on average 1.094890510948905) internal successors, (150), 136 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:23,438 INFO L93 Difference]: Finished difference Result 1241 states and 1249 transitions. [2022-01-31 17:37:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:37:23,438 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.094890510948905) internal successors, (150), 136 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 682 [2022-01-31 17:37:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:23,439 INFO L225 Difference]: With dead ends: 1241 [2022-01-31 17:37:23,439 INFO L226 Difference]: Without dead ends: 694 [2022-01-31 17:37:23,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:37:23,442 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1342 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 1465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1465 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:23,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 48 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1465 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:37:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-31 17:37:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 692. [2022-01-31 17:37:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 686 states have (on average 1.0058309037900874) internal successors, (690), 686 states have internal predecessors, (690), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 695 transitions. [2022-01-31 17:37:23,659 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 695 transitions. Word has length 682 [2022-01-31 17:37:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:23,660 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 695 transitions. [2022-01-31 17:37:23,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.094890510948905) internal successors, (150), 136 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 695 transitions. [2022-01-31 17:37:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2022-01-31 17:37:23,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:23,663 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:23,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:37:23,663 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:23,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:23,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1785041071, now seen corresponding path program 134 times [2022-01-31 17:37:23,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:23,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243131599] [2022-01-31 17:37:23,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:23,664 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:23,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:23,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:23,690 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:29,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:29,011 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:29,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243131599] [2022-01-31 17:37:29,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243131599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:29,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:29,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:37:29,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971016270] [2022-01-31 17:37:29,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:29,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:37:29,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:37:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:37:29,013 INFO L87 Difference]: Start difference. First operand 692 states and 695 transitions. Second operand has 138 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 137 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 17:37:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:38,993 INFO L93 Difference]: Finished difference Result 1250 states and 1258 transitions. [2022-01-31 17:37:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:37:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 137 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 687 [2022-01-31 17:37:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:38,994 INFO L225 Difference]: With dead ends: 1250 [2022-01-31 17:37:38,994 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 17:37:38,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:37:38,997 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1422 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 1546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1546 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:38,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1423 Valid, 53 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1546 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:37:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 17:37:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-01-31 17:37:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 691 states have (on average 1.0057887120115774) internal successors, (695), 691 states have internal predecessors, (695), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 700 transitions. [2022-01-31 17:37:39,220 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 700 transitions. Word has length 687 [2022-01-31 17:37:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:39,220 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 700 transitions. [2022-01-31 17:37:39,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 137 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 17:37:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 700 transitions. [2022-01-31 17:37:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-01-31 17:37:39,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:39,224 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:39,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:37:39,224 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -530117185, now seen corresponding path program 135 times [2022-01-31 17:37:39,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:39,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508501978] [2022-01-31 17:37:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:39,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:39,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:39,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:39,254 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:44,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:44,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508501978] [2022-01-31 17:37:44,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508501978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:44,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:44,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:37:44,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348020456] [2022-01-31 17:37:44,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:44,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:37:44,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:37:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:37:44,749 INFO L87 Difference]: Start difference. First operand 697 states and 700 transitions. Second operand has 139 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 138 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)