/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/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:41:18,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:41:18,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:41:18,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:41:18,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 20:41:18,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 20:41:18,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 20:41:18,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 20:41:18,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 20:41:18,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 20:41:18,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 20:41:18,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 20:41:18,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 20:41:18,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 20:41:18,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 20:41:18,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 20:41:18,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 20:41:18,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:41:18,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:41:18,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:41:18,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:41:18,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:41:18,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:41:18,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:41:18,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:41:18,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:41:18,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:41:18,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:41:18,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:41:18,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:41:18,624 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:41:18,624 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:41:18,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:41:18,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:41:18,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:41:18,842 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:41:18,842 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:41:18,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-01-31 20:41:18,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc88e5bdb/2c2ccba534264420aeb34ebb81f00a39/FLAG930d32384 [2022-01-31 20:41:19,195 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:41:19,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-01-31 20:41:19,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc88e5bdb/2c2ccba534264420aeb34ebb81f00a39/FLAG930d32384 [2022-01-31 20:41:19,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc88e5bdb/2c2ccba534264420aeb34ebb81f00a39 [2022-01-31 20:41:19,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:41:19,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:41:19,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:41:19,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:41:19,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:41:19,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb8d186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19, skipping insertion in model container [2022-01-31 20:41:19,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:41:19,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:41:19,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-01-31 20:41:19,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:41:19,805 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:41:19,813 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-01-31 20:41:19,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:41:19,831 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:41:19,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19 WrapperNode [2022-01-31 20:41:19,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:41:19,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:41:19,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:41:19,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:41:19,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:41:19,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:41:19,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:41:19,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:41:19,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (1/1) ... [2022-01-31 20:41:19,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:41:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:41:19,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 20:41:19,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 20:41:19,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:41:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:41:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:41:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 20:41:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:41:19,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:41:19,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:41:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:41:20,010 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:41:20,012 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:41:20,178 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:41:20,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:41:20,182 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-31 20:41:20,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:41:20 BoogieIcfgContainer [2022-01-31 20:41:20,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:41:20,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:41:20,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:41:20,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:41:20,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:41:19" (1/3) ... [2022-01-31 20:41:20,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b06e73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:41:20, skipping insertion in model container [2022-01-31 20:41:20,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:41:19" (2/3) ... [2022-01-31 20:41:20,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b06e73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:41:20, skipping insertion in model container [2022-01-31 20:41:20,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:41:20" (3/3) ... [2022-01-31 20:41:20,188 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-01-31 20:41:20,196 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:41:20,196 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:41:20,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:41:20,236 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 20:41:20,236 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:41:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:41:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 20:41:20,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:20,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:20,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:20,268 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-01-31 20:41:20,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:20,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757057392] [2022-01-31 20:41:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:20,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:20,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:20,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:20,453 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 20:41:20,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:20,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757057392] [2022-01-31 20:41:20,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [757057392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:20,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:20,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:41:20,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879829282] [2022-01-31 20:41:20,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:41:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:41:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:41:20,479 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:20,521 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-01-31 20:41:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:41:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 20:41:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:20,530 INFO L225 Difference]: With dead ends: 66 [2022-01-31 20:41:20,531 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 20:41:20,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:41:20,536 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:20,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 20:41:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 20:41:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-31 20:41:20,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-01-31 20:41:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:20,566 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-31 20:41:20,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-31 20:41:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 20:41:20,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:20,567 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] [2022-01-31 20:41:20,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:41:20,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-01-31 20:41:20,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:20,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80943038] [2022-01-31 20:41:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:20,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:20,574 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:20,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:20,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80943038] [2022-01-31 20:41:20,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [80943038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:20,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:20,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:41:20,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420570858] [2022-01-31 20:41:20,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:20,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:41:20,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:41:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:41:20,670 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:20,756 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-01-31 20:41:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:41:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 20:41:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:20,759 INFO L225 Difference]: With dead ends: 67 [2022-01-31 20:41:20,759 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 20:41:20,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:20,763 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:20,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 20:41:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-01-31 20:41:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-01-31 20:41:20,774 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-01-31 20:41:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:20,775 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-01-31 20:41:20,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-01-31 20:41:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 20:41:20,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:20,778 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 20:41:20,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:41:20,780 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-01-31 20:41:20,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:20,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045159226] [2022-01-31 20:41:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:20,797 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:20,797 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:20,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:20,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:20,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045159226] [2022-01-31 20:41:20,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045159226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:20,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:20,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:41:20,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009427858] [2022-01-31 20:41:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:20,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:41:20,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:41:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:20,909 INFO L87 Difference]: Start difference. First operand 31 states and 38 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 20:41:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:21,025 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-01-31 20:41:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:41:21,025 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 20:41:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:21,026 INFO L225 Difference]: With dead ends: 82 [2022-01-31 20:41:21,026 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 20:41:21,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:21,027 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:21,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:21,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 20:41:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2022-01-31 20:41:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-31 20:41:21,034 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-01-31 20:41:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:21,034 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-31 20:41:21,034 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 20:41:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-31 20:41:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 20:41:21,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:21,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:21,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:41:21,035 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:21,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2027956876, now seen corresponding path program 2 times [2022-01-31 20:41:21,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:21,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630655835] [2022-01-31 20:41:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:21,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:21,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:21,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:21,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:21,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:21,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:21,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630655835] [2022-01-31 20:41:21,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630655835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:21,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:21,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:41:21,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474521608] [2022-01-31 20:41:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:21,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:41:21,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:41:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:41:21,125 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 20:41:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:21,253 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-01-31 20:41:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:41:21,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 20:41:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:21,255 INFO L225 Difference]: With dead ends: 97 [2022-01-31 20:41:21,255 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 20:41:21,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:21,256 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:21,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 20:41:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2022-01-31 20:41:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-01-31 20:41:21,264 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2022-01-31 20:41:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-01-31 20:41:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 20:41:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-01-31 20:41:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 20:41:21,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:21,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:21,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:41:21,265 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1706217130, now seen corresponding path program 3 times [2022-01-31 20:41:21,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:21,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892842110] [2022-01-31 20:41:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:21,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:21,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:21,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:21,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:21,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:21,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892842110] [2022-01-31 20:41:21,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [892842110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:21,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:21,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:21,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086369778] [2022-01-31 20:41:21,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:21,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:21,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:21,394 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:21,621 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2022-01-31 20:41:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:41:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 20:41:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:21,622 INFO L225 Difference]: With dead ends: 112 [2022-01-31 20:41:21,622 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 20:41:21,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:21,623 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:21,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 20:41:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2022-01-31 20:41:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-01-31 20:41:21,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2022-01-31 20:41:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:21,632 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-01-31 20:41:21,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-01-31 20:41:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 20:41:21,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:21,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:21,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:41:21,633 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1751966536, now seen corresponding path program 4 times [2022-01-31 20:41:21,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927410068] [2022-01-31 20:41:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:21,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:21,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:21,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:21,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:21,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:21,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:21,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927410068] [2022-01-31 20:41:21,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [927410068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:21,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:21,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:41:21,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064411860] [2022-01-31 20:41:21,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:21,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:41:21,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:41:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:41:21,708 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 20:41:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:21,973 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-01-31 20:41:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 28 [2022-01-31 20:41:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:21,974 INFO L225 Difference]: With dead ends: 127 [2022-01-31 20:41:21,974 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 20:41:21,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:21,975 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:21,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 71 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 20:41:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2022-01-31 20:41:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-31 20:41:21,983 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2022-01-31 20:41:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:21,983 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-31 20:41:21,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 20:41:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-31 20:41:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 20:41:21,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:21,984 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:21,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:41:21,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1527494554, now seen corresponding path program 5 times [2022-01-31 20:41:21,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:21,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835369631] [2022-01-31 20:41:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:21,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:21,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:21,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:21,987 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:22,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835369631] [2022-01-31 20:41:22,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835369631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:22,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:22,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:22,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325548103] [2022-01-31 20:41:22,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:22,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:22,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:22,069 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:22,179 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-01-31 20:41:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:41:22,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 20:41:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:22,180 INFO L225 Difference]: With dead ends: 63 [2022-01-31 20:41:22,180 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 20:41:22,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:22,181 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:22,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 20:41:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-01-31 20:41:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-01-31 20:41:22,194 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 30 [2022-01-31 20:41:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:22,194 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-01-31 20:41:22,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-01-31 20:41:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 20:41:22,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:22,195 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 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 20:41:22,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:41:22,195 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 810905395, now seen corresponding path program 1 times [2022-01-31 20:41:22,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435622999] [2022-01-31 20:41:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:22,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:22,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:22,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:22,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,241 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 20:41:22,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435622999] [2022-01-31 20:41:22,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435622999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:22,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:22,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:41:22,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81833427] [2022-01-31 20:41:22,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:22,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:41:22,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:22,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:41:22,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:22,242 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 20:41:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:22,331 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-01-31 20:41:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:41:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 36 [2022-01-31 20:41:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:22,332 INFO L225 Difference]: With dead ends: 104 [2022-01-31 20:41:22,332 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 20:41:22,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:22,332 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:22,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 20:41:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-01-31 20:41:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-01-31 20:41:22,347 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 36 [2022-01-31 20:41:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:22,348 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-01-31 20:41:22,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 20:41:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-01-31 20:41:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 20:41:22,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:22,348 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 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 20:41:22,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:41:22,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1464313968, now seen corresponding path program 2 times [2022-01-31 20:41:22,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867419904] [2022-01-31 20:41:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:22,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:22,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:22,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:22,351 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:22,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:22,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867419904] [2022-01-31 20:41:22,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867419904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:22,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:22,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:41:22,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133404080] [2022-01-31 20:41:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:22,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:41:22,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:41:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:41:22,400 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 20:41:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:22,455 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2022-01-31 20:41:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:41:22,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 39 [2022-01-31 20:41:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:22,455 INFO L225 Difference]: With dead ends: 138 [2022-01-31 20:41:22,456 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 20:41:22,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:41:22,456 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:22,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 41 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 20:41:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-01-31 20:41:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-01-31 20:41:22,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 39 [2022-01-31 20:41:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:22,473 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-01-31 20:41:22,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 20:41:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-01-31 20:41:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 20:41:22,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:22,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 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 20:41:22,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:41:22,473 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2131958580, now seen corresponding path program 1 times [2022-01-31 20:41:22,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:22,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873132460] [2022-01-31 20:41:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:22,475 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:22,475 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:22,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:22,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:22,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:22,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873132460] [2022-01-31 20:41:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [873132460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:22,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:22,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:22,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799011062] [2022-01-31 20:41:22,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:22,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:22,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:22,849 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 20:41:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:23,177 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-01-31 20:41:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 40 [2022-01-31 20:41:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:23,178 INFO L225 Difference]: With dead ends: 90 [2022-01-31 20:41:23,178 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 20:41:23,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:41:23,179 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:23,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 58 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 20:41:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 20:41:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-31 20:41:23,194 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-31 20:41:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:23,195 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-31 20:41:23,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 20:41:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-31 20:41:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 20:41:23,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:23,195 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 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 20:41:23,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:41:23,195 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1769981706, now seen corresponding path program 1 times [2022-01-31 20:41:23,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:23,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024014674] [2022-01-31 20:41:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:23,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:23,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:23,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:23,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:23,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:23,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024014674] [2022-01-31 20:41:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024014674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:23,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:23,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:23,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893095] [2022-01-31 20:41:23,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:23,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:23,437 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 20:41:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:23,623 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-01-31 20:41:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 40 [2022-01-31 20:41:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:23,623 INFO L225 Difference]: With dead ends: 105 [2022-01-31 20:41:23,623 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 20:41:23,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:41:23,624 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:23,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 20:41:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 20:41:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-01-31 20:41:23,639 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 40 [2022-01-31 20:41:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:23,639 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-01-31 20:41:23,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 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 20:41:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-01-31 20:41:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:41:23,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:23,640 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 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 20:41:23,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:41:23,640 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2076492661, now seen corresponding path program 1 times [2022-01-31 20:41:23,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098826923] [2022-01-31 20:41:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:23,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:23,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:23,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:23,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:24,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:24,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098826923] [2022-01-31 20:41:24,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098826923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:24,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:24,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:41:24,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527249120] [2022-01-31 20:41:24,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:24,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:41:24,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:41:24,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:24,159 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20:41:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:24,724 INFO L93 Difference]: Finished difference Result 169 states and 216 transitions. [2022-01-31 20:41:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:41:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 41 [2022-01-31 20:41:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:24,725 INFO L225 Difference]: With dead ends: 169 [2022-01-31 20:41:24,725 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 20:41:24,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:41:24,726 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 202 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:24,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 77 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 20:41:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 93. [2022-01-31 20:41:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 88 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2022-01-31 20:41:24,747 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 41 [2022-01-31 20:41:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:24,747 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2022-01-31 20:41:24,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20:41:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2022-01-31 20:41:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 20:41:24,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:24,748 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 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 20:41:24,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:41:24,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1960309197, now seen corresponding path program 1 times [2022-01-31 20:41:24,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962110391] [2022-01-31 20:41:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:24,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:24,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:24,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:24,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:24,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:24,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962110391] [2022-01-31 20:41:24,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1962110391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:24,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458620944] [2022-01-31 20:41:24,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:24,913 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:25,081 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2022-01-31 20:41:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:25,081 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 20:41:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:25,082 INFO L225 Difference]: With dead ends: 134 [2022-01-31 20:41:25,082 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 20:41:25,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:25,083 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:25,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 42 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 20:41:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2022-01-31 20:41:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-01-31 20:41:25,119 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 41 [2022-01-31 20:41:25,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:25,119 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-01-31 20:41:25,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-01-31 20:41:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 20:41:25,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:25,119 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 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 20:41:25,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:41:25,120 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash -727315291, now seen corresponding path program 1 times [2022-01-31 20:41:25,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699282243] [2022-01-31 20:41:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:25,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:25,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:25,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:25,124 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699282243] [2022-01-31 20:41:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [699282243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:25,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572069409] [2022-01-31 20:41:25,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:25,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:25,212 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:25,454 INFO L93 Difference]: Finished difference Result 273 states and 351 transitions. [2022-01-31 20:41:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 42 [2022-01-31 20:41:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:25,455 INFO L225 Difference]: With dead ends: 273 [2022-01-31 20:41:25,455 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 20:41:25,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:25,456 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 143 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:25,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 57 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 20:41:25,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 80. [2022-01-31 20:41:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2022-01-31 20:41:25,494 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 42 [2022-01-31 20:41:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:25,494 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2022-01-31 20:41:25,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2022-01-31 20:41:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 20:41:25,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:25,495 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 1, 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 20:41:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 20:41:25,495 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1280661403, now seen corresponding path program 2 times [2022-01-31 20:41:25,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:25,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127788731] [2022-01-31 20:41:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:25,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:25,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:25,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:25,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127788731] [2022-01-31 20:41:25,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127788731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:41:25,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647180773] [2022-01-31 20:41:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:41:25,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:41:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:41:25,569 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:25,869 INFO L93 Difference]: Finished difference Result 288 states and 370 transitions. [2022-01-31 20:41:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 20:41:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 46 [2022-01-31 20:41:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:25,871 INFO L225 Difference]: With dead ends: 288 [2022-01-31 20:41:25,871 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 20:41:25,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:25,871 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 132 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:25,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 105 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 20:41:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 82. [2022-01-31 20:41:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 77 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-01-31 20:41:25,892 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 46 [2022-01-31 20:41:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:25,892 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-01-31 20:41:25,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-01-31 20:41:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 20:41:25,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:25,893 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 1, 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 20:41:25,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 20:41:25,893 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:25,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1482276086, now seen corresponding path program 3 times [2022-01-31 20:41:25,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:25,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683321571] [2022-01-31 20:41:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:25,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:25,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:25,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:25,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:25,989 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:25,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683321571] [2022-01-31 20:41:25,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1683321571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:25,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:25,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:25,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222267511] [2022-01-31 20:41:25,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:25,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:25,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:25,990 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:26,456 INFO L93 Difference]: Finished difference Result 423 states and 549 transitions. [2022-01-31 20:41:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 48 [2022-01-31 20:41:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:26,458 INFO L225 Difference]: With dead ends: 423 [2022-01-31 20:41:26,458 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 20:41:26,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:41:26,458 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 276 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:26,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 112 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 20:41:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 86. [2022-01-31 20:41:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.271604938271605) internal successors, (103), 81 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2022-01-31 20:41:26,509 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 48 [2022-01-31 20:41:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:26,509 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2022-01-31 20:41:26,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2022-01-31 20:41:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:26,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:26,510 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:41:26,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 20:41:26,510 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 1 times [2022-01-31 20:41:26,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:26,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173417098] [2022-01-31 20:41:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:26,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:26,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:26,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:26,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:27,831 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:27,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173417098] [2022-01-31 20:41:27,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173417098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:27,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:27,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:41:27,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281773073] [2022-01-31 20:41:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:27,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:41:27,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:41:27,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:41:27,832 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:28,780 INFO L93 Difference]: Finished difference Result 205 states and 261 transitions. [2022-01-31 20:41:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:41:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 51 [2022-01-31 20:41:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:28,781 INFO L225 Difference]: With dead ends: 205 [2022-01-31 20:41:28,781 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 20:41:28,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:41:28,782 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 208 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:28,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 53 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 20:41:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 127. [2022-01-31 20:41:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.2950819672131149) internal successors, (158), 122 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2022-01-31 20:41:28,827 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 51 [2022-01-31 20:41:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:28,827 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2022-01-31 20:41:28,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2022-01-31 20:41:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:28,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:28,827 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:41:28,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 20:41:28,828 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash -557897751, now seen corresponding path program 2 times [2022-01-31 20:41:28,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:28,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198643690] [2022-01-31 20:41:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:28,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:28,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:28,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:28,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:29,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:29,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198643690] [2022-01-31 20:41:29,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [198643690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:29,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:29,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:29,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643129051] [2022-01-31 20:41:29,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:29,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:29,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:29,269 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:29,588 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2022-01-31 20:41:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:29,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 51 [2022-01-31 20:41:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:29,589 INFO L225 Difference]: With dead ends: 187 [2022-01-31 20:41:29,589 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 20:41:29,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:29,590 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:29,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 20:41:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-01-31 20:41:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2734375) internal successors, (163), 128 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-01-31 20:41:29,636 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 51 [2022-01-31 20:41:29,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:29,636 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-01-31 20:41:29,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:29,636 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-01-31 20:41:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:29,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:29,637 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 20:41:29,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 20:41:29,637 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -145264029, now seen corresponding path program 1 times [2022-01-31 20:41:29,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:29,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184399671] [2022-01-31 20:41:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:29,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:29,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:29,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:29,639 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:29,743 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184399671] [2022-01-31 20:41:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184399671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:29,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:29,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241036654] [2022-01-31 20:41:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:29,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:29,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:29,744 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 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 20:41:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:30,040 INFO L93 Difference]: Finished difference Result 241 states and 303 transitions. [2022-01-31 20:41:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:41:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 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 51 [2022-01-31 20:41:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:30,041 INFO L225 Difference]: With dead ends: 241 [2022-01-31 20:41:30,041 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 20:41:30,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:41:30,042 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 122 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:30,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 95 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 20:41:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2022-01-31 20:41:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.278688524590164) internal successors, (234), 183 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:30,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 238 transitions. [2022-01-31 20:41:30,117 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 238 transitions. Word has length 51 [2022-01-31 20:41:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:30,118 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 238 transitions. [2022-01-31 20:41:30,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 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 20:41:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 238 transitions. [2022-01-31 20:41:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:30,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:30,118 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:41:30,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 20:41:30,118 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-01-31 20:41:30,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803984318] [2022-01-31 20:41:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:30,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:30,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:30,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:30,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:30,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803984318] [2022-01-31 20:41:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803984318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:30,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:30,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:41:30,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549971849] [2022-01-31 20:41:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:41:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:41:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:30,985 INFO L87 Difference]: Start difference. First operand 188 states and 238 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 20:41:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:31,672 INFO L93 Difference]: Finished difference Result 383 states and 488 transitions. [2022-01-31 20:41:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:41:31,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 51 [2022-01-31 20:41:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:31,674 INFO L225 Difference]: With dead ends: 383 [2022-01-31 20:41:31,674 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 20:41:31,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:41:31,675 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 165 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:31,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 45 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 20:41:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 210. [2022-01-31 20:41:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.278048780487805) internal successors, (262), 205 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 266 transitions. [2022-01-31 20:41:31,800 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 266 transitions. Word has length 51 [2022-01-31 20:41:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 266 transitions. [2022-01-31 20:41:31,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 20:41:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 266 transitions. [2022-01-31 20:41:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:31,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:31,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:41:31,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 20:41:31,802 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-01-31 20:41:31,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:31,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015855387] [2022-01-31 20:41:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:31,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:31,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:31,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:31,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:32,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015855387] [2022-01-31 20:41:32,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015855387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:32,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:32,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:32,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223795243] [2022-01-31 20:41:32,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:32,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:32,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:32,545 INFO L87 Difference]: Start difference. First operand 210 states and 266 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:33,086 INFO L93 Difference]: Finished difference Result 448 states and 577 transitions. [2022-01-31 20:41:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-01-31 20:41:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:33,088 INFO L225 Difference]: With dead ends: 448 [2022-01-31 20:41:33,088 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 20:41:33,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:33,089 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 127 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:33,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 53 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 20:41:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 254. [2022-01-31 20:41:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.2610441767068272) internal successors, (314), 249 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 318 transitions. [2022-01-31 20:41:33,241 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 318 transitions. Word has length 51 [2022-01-31 20:41:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:33,242 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 318 transitions. [2022-01-31 20:41:33,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 318 transitions. [2022-01-31 20:41:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 20:41:33,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:33,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 20:41:33,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 20:41:33,247 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 2 times [2022-01-31 20:41:33,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:33,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187777474] [2022-01-31 20:41:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:33,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:33,249 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:33,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:33,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:34,379 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 20:41:34,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187777474] [2022-01-31 20:41:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1187777474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:34,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:34,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:41:34,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711462203] [2022-01-31 20:41:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:34,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:41:34,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:41:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:41:34,380 INFO L87 Difference]: Start difference. First operand 254 states and 318 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:35,337 INFO L93 Difference]: Finished difference Result 427 states and 529 transitions. [2022-01-31 20:41:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:41:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 51 [2022-01-31 20:41:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:35,338 INFO L225 Difference]: With dead ends: 427 [2022-01-31 20:41:35,338 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 20:41:35,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:41:35,339 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 154 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:35,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 76 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 20:41:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 249. [2022-01-31 20:41:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2295081967213115) internal successors, (300), 244 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 304 transitions. [2022-01-31 20:41:35,459 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 304 transitions. Word has length 51 [2022-01-31 20:41:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:35,460 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 304 transitions. [2022-01-31 20:41:35,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 304 transitions. [2022-01-31 20:41:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 20:41:35,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:35,460 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 2, 2, 2, 1, 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 20:41:35,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 20:41:35,461 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900780, now seen corresponding path program 4 times [2022-01-31 20:41:35,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:35,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815141370] [2022-01-31 20:41:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:35,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:35,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:35,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:35,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:35,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:35,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:35,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815141370] [2022-01-31 20:41:35,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815141370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:35,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:35,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:41:35,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228533000] [2022-01-31 20:41:35,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:35,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:41:35,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:41:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:35,578 INFO L87 Difference]: Start difference. First operand 249 states and 304 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:36,722 INFO L93 Difference]: Finished difference Result 1118 states and 1418 transitions. [2022-01-31 20:41:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:41:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 52 [2022-01-31 20:41:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:36,725 INFO L225 Difference]: With dead ends: 1118 [2022-01-31 20:41:36,725 INFO L226 Difference]: Without dead ends: 1089 [2022-01-31 20:41:36,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:41:36,726 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 358 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:36,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 160 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:41:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-01-31 20:41:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 253. [2022-01-31 20:41:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.2338709677419355) internal successors, (306), 248 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 310 transitions. [2022-01-31 20:41:36,851 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 310 transitions. Word has length 52 [2022-01-31 20:41:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:36,851 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 310 transitions. [2022-01-31 20:41:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 310 transitions. [2022-01-31 20:41:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 20:41:36,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:36,852 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 20:41:36,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 20:41:36,853 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347862, now seen corresponding path program 2 times [2022-01-31 20:41:36,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:36,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320196205] [2022-01-31 20:41:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:36,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:36,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:36,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:36,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:36,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:36,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:36,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320196205] [2022-01-31 20:41:36,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [320196205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:36,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:36,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 20:41:36,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654383827] [2022-01-31 20:41:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:36,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 20:41:36,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 20:41:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:41:36,944 INFO L87 Difference]: Start difference. First operand 253 states and 310 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:37,465 INFO L93 Difference]: Finished difference Result 609 states and 766 transitions. [2022-01-31 20:41:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:41:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 53 [2022-01-31 20:41:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:37,467 INFO L225 Difference]: With dead ends: 609 [2022-01-31 20:41:37,467 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 20:41:37,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:41:37,468 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 179 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:37,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 69 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 20:41:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 287. [2022-01-31 20:41:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.2446808510638299) internal successors, (351), 282 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 355 transitions. [2022-01-31 20:41:37,625 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 355 transitions. Word has length 53 [2022-01-31 20:41:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:37,625 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 355 transitions. [2022-01-31 20:41:37,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 355 transitions. [2022-01-31 20:41:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 20:41:37,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:37,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 20:41:37,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 20:41:37,626 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-01-31 20:41:37,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:37,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899341889] [2022-01-31 20:41:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:37,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:37,628 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:37,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:37,629 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:37,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:37,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:37,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899341889] [2022-01-31 20:41:37,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899341889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:37,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:37,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:41:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992450007] [2022-01-31 20:41:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:37,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:41:37,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:41:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 20:41:37,669 INFO L87 Difference]: Start difference. First operand 287 states and 355 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:37,875 INFO L93 Difference]: Finished difference Result 485 states and 598 transitions. [2022-01-31 20:41:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:41:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 54 [2022-01-31 20:41:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:37,877 INFO L225 Difference]: With dead ends: 485 [2022-01-31 20:41:37,877 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 20:41:37,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:37,878 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:37,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:41:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 20:41:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 261. [2022-01-31 20:41:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.16796875) internal successors, (299), 256 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 303 transitions. [2022-01-31 20:41:38,013 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 303 transitions. Word has length 54 [2022-01-31 20:41:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:38,013 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 303 transitions. [2022-01-31 20:41:38,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 303 transitions. [2022-01-31 20:41:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 20:41:38,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:38,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 20:41:38,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 20:41:38,014 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1965807313, now seen corresponding path program 3 times [2022-01-31 20:41:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544233687] [2022-01-31 20:41:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:38,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:38,018 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:38,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:38,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:38,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:38,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:38,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544233687] [2022-01-31 20:41:38,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544233687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:38,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:38,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:41:38,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786623027] [2022-01-31 20:41:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:38,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:41:38,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:41:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:41:38,125 INFO L87 Difference]: Start difference. First operand 261 states and 303 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:38,809 INFO L93 Difference]: Finished difference Result 720 states and 849 transitions. [2022-01-31 20:41:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:41:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 55 [2022-01-31 20:41:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:38,811 INFO L225 Difference]: With dead ends: 720 [2022-01-31 20:41:38,811 INFO L226 Difference]: Without dead ends: 666 [2022-01-31 20:41:38,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:41:38,811 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 216 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:38,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 90 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-31 20:41:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 261. [2022-01-31 20:41:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.16796875) internal successors, (299), 256 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 303 transitions. [2022-01-31 20:41:38,946 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 303 transitions. Word has length 55 [2022-01-31 20:41:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:38,946 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 303 transitions. [2022-01-31 20:41:38,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 303 transitions. [2022-01-31 20:41:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 20:41:38,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:38,947 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 2, 2, 2, 1, 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 20:41:38,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 20:41:38,947 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:38,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 5 times [2022-01-31 20:41:38,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:38,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422954513] [2022-01-31 20:41:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:38,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:38,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:38,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:38,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:39,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:39,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422954513] [2022-01-31 20:41:39,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422954513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:39,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:39,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:41:39,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077720741] [2022-01-31 20:41:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:39,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:41:39,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:41:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:39,071 INFO L87 Difference]: Start difference. First operand 261 states and 303 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:40,526 INFO L93 Difference]: Finished difference Result 1198 states and 1425 transitions. [2022-01-31 20:41:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:41:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 56 [2022-01-31 20:41:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:40,529 INFO L225 Difference]: With dead ends: 1198 [2022-01-31 20:41:40,529 INFO L226 Difference]: Without dead ends: 1169 [2022-01-31 20:41:40,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:41:40,530 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 317 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:40,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 208 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:41:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-31 20:41:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 263. [2022-01-31 20:41:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1705426356589148) internal successors, (302), 258 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 306 transitions. [2022-01-31 20:41:40,672 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 306 transitions. Word has length 56 [2022-01-31 20:41:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:40,672 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 306 transitions. [2022-01-31 20:41:40,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 306 transitions. [2022-01-31 20:41:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 20:41:40,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:40,673 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 20:41:40,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 20:41:40,673 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1827890636, now seen corresponding path program 4 times [2022-01-31 20:41:40,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:40,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117878167] [2022-01-31 20:41:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:40,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:40,674 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:40,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:40,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:40,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:40,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117878167] [2022-01-31 20:41:40,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [117878167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:40,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:40,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:41:40,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376334276] [2022-01-31 20:41:40,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:40,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:41:40,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:41:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:41:40,781 INFO L87 Difference]: Start difference. First operand 263 states and 306 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:41,700 INFO L93 Difference]: Finished difference Result 856 states and 1011 transitions. [2022-01-31 20:41:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 57 [2022-01-31 20:41:41,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:41,702 INFO L225 Difference]: With dead ends: 856 [2022-01-31 20:41:41,702 INFO L226 Difference]: Without dead ends: 802 [2022-01-31 20:41:41,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:41:41,703 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 246 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:41,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 114 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-31 20:41:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 263. [2022-01-31 20:41:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1705426356589148) internal successors, (302), 258 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 306 transitions. [2022-01-31 20:41:41,850 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 306 transitions. Word has length 57 [2022-01-31 20:41:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:41,850 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 306 transitions. [2022-01-31 20:41:41,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 306 transitions. [2022-01-31 20:41:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 20:41:41,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:41,851 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 2, 2, 2, 1, 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 20:41:41,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 20:41:41,851 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1973766531, now seen corresponding path program 6 times [2022-01-31 20:41:41,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:41,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967815201] [2022-01-31 20:41:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:41,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:41,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:41,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:41,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:42,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967815201] [2022-01-31 20:41:42,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967815201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:42,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:42,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:41:42,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204840624] [2022-01-31 20:41:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:42,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:41:42,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:41:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:41:42,009 INFO L87 Difference]: Start difference. First operand 263 states and 306 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:44,147 INFO L93 Difference]: Finished difference Result 1495 states and 1780 transitions. [2022-01-31 20:41:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:41:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 58 [2022-01-31 20:41:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:44,153 INFO L225 Difference]: With dead ends: 1495 [2022-01-31 20:41:44,154 INFO L226 Difference]: Without dead ends: 1466 [2022-01-31 20:41:44,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:41:44,155 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 413 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:44,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 242 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:41:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-01-31 20:41:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 267. [2022-01-31 20:41:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.1755725190839694) internal successors, (308), 262 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2022-01-31 20:41:44,353 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 58 [2022-01-31 20:41:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:44,353 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2022-01-31 20:41:44,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2022-01-31 20:41:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 20:41:44,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:44,354 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 20:41:44,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 20:41:44,354 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1861017081, now seen corresponding path program 5 times [2022-01-31 20:41:44,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:44,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797630161] [2022-01-31 20:41:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:44,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:44,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:44,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:44,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:44,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:44,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797630161] [2022-01-31 20:41:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [797630161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:44,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:44,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:44,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289594947] [2022-01-31 20:41:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:44,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:44,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:44,522 INFO L87 Difference]: Start difference. First operand 267 states and 312 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:45,759 INFO L93 Difference]: Finished difference Result 994 states and 1176 transitions. [2022-01-31 20:41:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:41:45,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 59 [2022-01-31 20:41:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:45,762 INFO L225 Difference]: With dead ends: 994 [2022-01-31 20:41:45,762 INFO L226 Difference]: Without dead ends: 940 [2022-01-31 20:41:45,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:41:45,763 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 277 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:45,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 136 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:41:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-31 20:41:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 267. [2022-01-31 20:41:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.1755725190839694) internal successors, (308), 262 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2022-01-31 20:41:45,945 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 59 [2022-01-31 20:41:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:45,945 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2022-01-31 20:41:45,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2022-01-31 20:41:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 20:41:45,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:45,946 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 20:41:45,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 20:41:45,946 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-01-31 20:41:45,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:45,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775611602] [2022-01-31 20:41:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:45,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:45,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:45,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:45,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:46,054 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 20:41:46,054 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:46,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775611602] [2022-01-31 20:41:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [775611602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:46,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 20:41:46,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533573745] [2022-01-31 20:41:46,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:46,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 20:41:46,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 20:41:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:41:46,055 INFO L87 Difference]: Start difference. First operand 267 states and 312 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:46,393 INFO L93 Difference]: Finished difference Result 353 states and 410 transitions. [2022-01-31 20:41:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 20:41:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 60 [2022-01-31 20:41:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:46,395 INFO L225 Difference]: With dead ends: 353 [2022-01-31 20:41:46,395 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 20:41:46,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:46,395 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:46,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 50 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 20:41:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 231. [2022-01-31 20:41:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.1814159292035398) internal successors, (267), 226 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 271 transitions. [2022-01-31 20:41:46,542 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 271 transitions. Word has length 60 [2022-01-31 20:41:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 271 transitions. [2022-01-31 20:41:46,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 271 transitions. [2022-01-31 20:41:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:41:46,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:46,543 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 20:41:46,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 20:41:46,543 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 4 times [2022-01-31 20:41:46,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:46,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957064946] [2022-01-31 20:41:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:46,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:46,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:46,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:46,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:46,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:46,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957064946] [2022-01-31 20:41:46,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [957064946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:46,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:46,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:41:46,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554095289] [2022-01-31 20:41:46,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:46,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:41:46,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:41:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:41:46,968 INFO L87 Difference]: Start difference. First operand 231 states and 271 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:47,489 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2022-01-31 20:41:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:41:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-01-31 20:41:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:47,490 INFO L225 Difference]: With dead ends: 267 [2022-01-31 20:41:47,490 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 20:41:47,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:41:47,491 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:47,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 46 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 20:41:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 20:41:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2043010752688172) internal successors, (224), 186 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2022-01-31 20:41:47,617 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 61 [2022-01-31 20:41:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:47,617 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2022-01-31 20:41:47,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2022-01-31 20:41:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 20:41:47,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:47,618 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 20:41:47,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 20:41:47,618 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash -741653378, now seen corresponding path program 6 times [2022-01-31 20:41:47,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:47,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279549398] [2022-01-31 20:41:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:47,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:47,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:47,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:47,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:47,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:47,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279549398] [2022-01-31 20:41:47,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279549398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:47,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:47,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:41:47,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109971384] [2022-01-31 20:41:47,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:41:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:41:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:41:47,774 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:49,188 INFO L93 Difference]: Finished difference Result 1025 states and 1219 transitions. [2022-01-31 20:41:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:41:49,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 61 [2022-01-31 20:41:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:49,191 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 20:41:49,191 INFO L226 Difference]: Without dead ends: 971 [2022-01-31 20:41:49,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:41:49,192 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 271 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:49,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 146 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:41:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-31 20:41:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 191. [2022-01-31 20:41:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2043010752688172) internal successors, (224), 186 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 228 transitions. [2022-01-31 20:41:49,327 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 228 transitions. Word has length 61 [2022-01-31 20:41:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:49,327 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 228 transitions. [2022-01-31 20:41:49,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 228 transitions. [2022-01-31 20:41:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:41:49,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:49,328 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:41:49,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 20:41:49,328 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 5 times [2022-01-31 20:41:49,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619027760] [2022-01-31 20:41:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:49,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:49,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:49,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:49,330 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:50,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:50,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619027760] [2022-01-31 20:41:50,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619027760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:50,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:50,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:41:50,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863164460] [2022-01-31 20:41:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:50,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:41:50,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:41:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:41:50,065 INFO L87 Difference]: Start difference. First operand 191 states and 228 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 20:41:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:51,582 INFO L93 Difference]: Finished difference Result 677 states and 807 transitions. [2022-01-31 20:41:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:41:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 62 [2022-01-31 20:41:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:51,584 INFO L225 Difference]: With dead ends: 677 [2022-01-31 20:41:51,584 INFO L226 Difference]: Without dead ends: 590 [2022-01-31 20:41:51,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:41:51,585 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 287 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:51,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 88 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:41:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-31 20:41:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 274. [2022-01-31 20:41:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.1821561338289963) internal successors, (318), 269 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2022-01-31 20:41:51,822 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 62 [2022-01-31 20:41:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:51,822 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2022-01-31 20:41:51,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 20:41:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2022-01-31 20:41:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:41:51,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:51,823 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:41:51,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 20:41:51,823 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 6 times [2022-01-31 20:41:51,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:51,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810753110] [2022-01-31 20:41:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:51,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:51,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:51,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:51,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:52,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:52,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:52,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810753110] [2022-01-31 20:41:52,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810753110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:52,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:52,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:41:52,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012295743] [2022-01-31 20:41:52,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:52,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:41:52,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:41:52,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:41:52,635 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 20:41:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:54,276 INFO L93 Difference]: Finished difference Result 638 states and 752 transitions. [2022-01-31 20:41:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:41:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 62 [2022-01-31 20:41:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:54,293 INFO L225 Difference]: With dead ends: 638 [2022-01-31 20:41:54,293 INFO L226 Difference]: Without dead ends: 633 [2022-01-31 20:41:54,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:41:54,294 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 248 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:54,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 97 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:41:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-31 20:41:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 316. [2022-01-31 20:41:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.1961414790996785) internal successors, (372), 311 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 376 transitions. [2022-01-31 20:41:54,560 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 376 transitions. Word has length 62 [2022-01-31 20:41:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:54,561 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 376 transitions. [2022-01-31 20:41:54,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 20:41:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 376 transitions. [2022-01-31 20:41:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:41:54,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:54,561 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:41:54,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 20:41:54,561 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:54,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1338068092, now seen corresponding path program 7 times [2022-01-31 20:41:54,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627394988] [2022-01-31 20:41:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:54,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:54,563 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:54,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:54,564 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:55,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:55,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627394988] [2022-01-31 20:41:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [627394988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:55,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:55,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:55,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43583908] [2022-01-31 20:41:55,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:55,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:55,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:55,180 INFO L87 Difference]: Start difference. First operand 316 states and 376 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:55,723 INFO L93 Difference]: Finished difference Result 451 states and 531 transitions. [2022-01-31 20:41:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 62 [2022-01-31 20:41:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:55,724 INFO L225 Difference]: With dead ends: 451 [2022-01-31 20:41:55,724 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 20:41:55,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:55,727 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:55,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 45 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 20:41:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 324. [2022-01-31 20:41:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.188087774294671) internal successors, (379), 319 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 383 transitions. [2022-01-31 20:41:56,021 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 383 transitions. Word has length 62 [2022-01-31 20:41:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:56,021 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 383 transitions. [2022-01-31 20:41:56,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 383 transitions. [2022-01-31 20:41:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 20:41:56,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:56,022 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:41:56,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 20:41:56,022 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash 11316032, now seen corresponding path program 8 times [2022-01-31 20:41:56,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:56,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755024220] [2022-01-31 20:41:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:56,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:56,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:56,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:56,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:56,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:56,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:56,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755024220] [2022-01-31 20:41:56,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755024220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:56,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:56,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:56,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772692102] [2022-01-31 20:41:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:56,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:56,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:56,239 INFO L87 Difference]: Start difference. First operand 324 states and 383 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 20:41:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:56,899 INFO L93 Difference]: Finished difference Result 471 states and 551 transitions. [2022-01-31 20:41:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:41:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 62 [2022-01-31 20:41:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:56,912 INFO L225 Difference]: With dead ends: 471 [2022-01-31 20:41:56,912 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 20:41:56,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:56,915 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 145 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:56,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 63 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:41:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 20:41:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 274. [2022-01-31 20:41:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.1858736059479553) internal successors, (319), 269 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 323 transitions. [2022-01-31 20:41:57,165 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 323 transitions. Word has length 62 [2022-01-31 20:41:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:57,165 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 323 transitions. [2022-01-31 20:41:57,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 20:41:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 323 transitions. [2022-01-31 20:41:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:41:57,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:57,166 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:57,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 20:41:57,166 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1517007984, now seen corresponding path program 7 times [2022-01-31 20:41:57,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:57,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260889843] [2022-01-31 20:41:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:57,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:57,168 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:57,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:57,170 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:57,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:57,307 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:57,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260889843] [2022-01-31 20:41:57,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [260889843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:57,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:57,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:41:57,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575465206] [2022-01-31 20:41:57,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:57,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:41:57,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:41:57,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:41:57,308 INFO L87 Difference]: Start difference. First operand 274 states and 323 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:41:58,123 INFO L93 Difference]: Finished difference Result 448 states and 525 transitions. [2022-01-31 20:41:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:41:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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 72 [2022-01-31 20:41:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:41:58,125 INFO L225 Difference]: With dead ends: 448 [2022-01-31 20:41:58,125 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 20:41:58,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:41:58,126 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 186 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:41:58,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 134 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:41:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 20:41:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 348. [2022-01-31 20:41:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.1807580174927115) internal successors, (405), 343 states have internal predecessors, (405), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 409 transitions. [2022-01-31 20:41:58,498 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 409 transitions. Word has length 72 [2022-01-31 20:41:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:41:58,499 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 409 transitions. [2022-01-31 20:41:58,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:41:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 409 transitions. [2022-01-31 20:41:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:41:58,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:41:58,500 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:41:58,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 20:41:58,500 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:41:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:41:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 8 times [2022-01-31 20:41:58,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:41:58,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672216778] [2022-01-31 20:41:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:41:58,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:41:58,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:41:58,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:41:58,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:41:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:41:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:41:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:41:59,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:41:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672216778] [2022-01-31 20:41:59,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672216778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:41:59,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:41:59,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:41:59,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534474552] [2022-01-31 20:41:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:41:59,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:41:59,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:41:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:41:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:41:59,595 INFO L87 Difference]: Start difference. First operand 348 states and 409 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:01,222 INFO L93 Difference]: Finished difference Result 800 states and 933 transitions. [2022-01-31 20:42:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:42:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-01-31 20:42:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:01,232 INFO L225 Difference]: With dead ends: 800 [2022-01-31 20:42:01,232 INFO L226 Difference]: Without dead ends: 746 [2022-01-31 20:42:01,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:42:01,233 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 250 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:01,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 66 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-01-31 20:42:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 405. [2022-01-31 20:42:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.1625) internal successors, (465), 400 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 469 transitions. [2022-01-31 20:42:01,782 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 469 transitions. Word has length 72 [2022-01-31 20:42:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 469 transitions. [2022-01-31 20:42:01,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 469 transitions. [2022-01-31 20:42:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:01,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:01,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 20:42:01,787 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:01,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 9 times [2022-01-31 20:42:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170525636] [2022-01-31 20:42:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:01,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:01,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:01,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:01,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:03,026 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 20:42:03,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:03,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170525636] [2022-01-31 20:42:03,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1170525636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:03,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:03,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:42:03,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170750792] [2022-01-31 20:42:03,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:03,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:42:03,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:42:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:42:03,028 INFO L87 Difference]: Start difference. First operand 405 states and 469 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 20:42:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:05,018 INFO L93 Difference]: Finished difference Result 930 states and 1085 transitions. [2022-01-31 20:42:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:42:05,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 72 [2022-01-31 20:42:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:05,020 INFO L225 Difference]: With dead ends: 930 [2022-01-31 20:42:05,020 INFO L226 Difference]: Without dead ends: 867 [2022-01-31 20:42:05,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:42:05,021 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 201 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:05,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 68 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:42:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-31 20:42:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 538. [2022-01-31 20:42:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 533 states have (on average 1.1613508442776737) internal successors, (619), 533 states have internal predecessors, (619), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 623 transitions. [2022-01-31 20:42:05,695 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 623 transitions. Word has length 72 [2022-01-31 20:42:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:05,695 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 623 transitions. [2022-01-31 20:42:05,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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 20:42:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 623 transitions. [2022-01-31 20:42:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:05,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:05,696 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:05,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 20:42:05,697 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 10 times [2022-01-31 20:42:05,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:05,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550515851] [2022-01-31 20:42:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:05,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:05,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:05,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:05,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:06,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:06,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550515851] [2022-01-31 20:42:06,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550515851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:06,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:06,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:42:06,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273993766] [2022-01-31 20:42:06,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:42:06,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:42:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:42:06,580 INFO L87 Difference]: Start difference. First operand 538 states and 623 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:08,375 INFO L93 Difference]: Finished difference Result 901 states and 1045 transitions. [2022-01-31 20:42:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:42:08,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-01-31 20:42:08,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:08,377 INFO L225 Difference]: With dead ends: 901 [2022-01-31 20:42:08,377 INFO L226 Difference]: Without dead ends: 857 [2022-01-31 20:42:08,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:42:08,378 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 195 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:08,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 73 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-31 20:42:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 700. [2022-01-31 20:42:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 695 states have (on average 1.1597122302158274) internal successors, (806), 695 states have internal predecessors, (806), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 810 transitions. [2022-01-31 20:42:09,201 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 810 transitions. Word has length 72 [2022-01-31 20:42:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:09,201 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 810 transitions. [2022-01-31 20:42:09,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 810 transitions. [2022-01-31 20:42:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:09,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:09,202 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:09,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 20:42:09,203 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 11 times [2022-01-31 20:42:09,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352993199] [2022-01-31 20:42:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:09,204 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:09,204 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:09,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:09,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:10,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:10,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:10,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352993199] [2022-01-31 20:42:10,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [352993199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:10,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:10,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:42:10,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000390215] [2022-01-31 20:42:10,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:10,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:42:10,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:42:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:42:10,468 INFO L87 Difference]: Start difference. First operand 700 states and 810 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 20:42:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:12,645 INFO L93 Difference]: Finished difference Result 1071 states and 1243 transitions. [2022-01-31 20:42:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 20:42:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 72 [2022-01-31 20:42:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:12,648 INFO L225 Difference]: With dead ends: 1071 [2022-01-31 20:42:12,648 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 20:42:12,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=1447, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:42:12,649 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 258 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:12,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 65 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:42:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 20:42:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 688. [2022-01-31 20:42:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 683 states have (on average 1.1522693997071742) internal successors, (787), 683 states have internal predecessors, (787), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 791 transitions. [2022-01-31 20:42:13,493 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 791 transitions. Word has length 72 [2022-01-31 20:42:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:13,493 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 791 transitions. [2022-01-31 20:42:13,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 20:42:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 791 transitions. [2022-01-31 20:42:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:13,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:13,494 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:13,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 20:42:13,494 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1533502382, now seen corresponding path program 12 times [2022-01-31 20:42:13,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:13,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265069212] [2022-01-31 20:42:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:13,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:13,496 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:13,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:13,497 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:14,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:14,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265069212] [2022-01-31 20:42:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [265069212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:14,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:14,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:42:14,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798619089] [2022-01-31 20:42:14,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:14,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:42:14,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:42:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:42:14,344 INFO L87 Difference]: Start difference. First operand 688 states and 791 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:16,017 INFO L93 Difference]: Finished difference Result 1122 states and 1277 transitions. [2022-01-31 20:42:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:42:16,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 72 [2022-01-31 20:42:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:16,020 INFO L225 Difference]: With dead ends: 1122 [2022-01-31 20:42:16,020 INFO L226 Difference]: Without dead ends: 995 [2022-01-31 20:42:16,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:42:16,022 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 111 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:16,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 60 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:42:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-31 20:42:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 861. [2022-01-31 20:42:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 856 states have (on average 1.1495327102803738) internal successors, (984), 856 states have internal predecessors, (984), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 988 transitions. [2022-01-31 20:42:17,069 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 988 transitions. Word has length 72 [2022-01-31 20:42:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:17,069 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 988 transitions. [2022-01-31 20:42:17,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 988 transitions. [2022-01-31 20:42:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:17,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:17,071 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:17,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 20:42:17,071 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:17,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1520169742, now seen corresponding path program 13 times [2022-01-31 20:42:17,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:17,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546044413] [2022-01-31 20:42:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:17,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:17,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:17,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:17,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:18,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:18,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546044413] [2022-01-31 20:42:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546044413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:18,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:18,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:42:18,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425485123] [2022-01-31 20:42:18,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:42:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:42:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:42:18,210 INFO L87 Difference]: Start difference. First operand 861 states and 988 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 20:42:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:20,187 INFO L93 Difference]: Finished difference Result 1116 states and 1269 transitions. [2022-01-31 20:42:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:42:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 72 [2022-01-31 20:42:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:20,190 INFO L225 Difference]: With dead ends: 1116 [2022-01-31 20:42:20,190 INFO L226 Difference]: Without dead ends: 1017 [2022-01-31 20:42:20,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:42:20,191 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:20,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 53 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-31 20:42:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 840. [2022-01-31 20:42:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 835 states have (on average 1.141317365269461) internal successors, (953), 835 states have internal predecessors, (953), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 957 transitions. [2022-01-31 20:42:21,296 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 957 transitions. Word has length 72 [2022-01-31 20:42:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:21,296 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 957 transitions. [2022-01-31 20:42:21,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 20:42:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 957 transitions. [2022-01-31 20:42:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 20:42:21,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:21,298 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:21,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 20:42:21,298 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash -316626525, now seen corresponding path program 7 times [2022-01-31 20:42:21,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:21,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811987722] [2022-01-31 20:42:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:21,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:21,299 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:21,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:21,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:21,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:21,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:21,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811987722] [2022-01-31 20:42:21,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811987722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:21,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:21,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:42:21,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119166307] [2022-01-31 20:42:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:21,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:42:21,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:42:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:42:21,500 INFO L87 Difference]: Start difference. First operand 840 states and 957 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:27,528 INFO L93 Difference]: Finished difference Result 3633 states and 4239 transitions. [2022-01-31 20:42:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:42:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 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 72 [2022-01-31 20:42:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:27,536 INFO L225 Difference]: With dead ends: 3633 [2022-01-31 20:42:27,536 INFO L226 Difference]: Without dead ends: 3589 [2022-01-31 20:42:27,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:42:27,537 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 454 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:27,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 271 Invalid, 3254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:42:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-01-31 20:42:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 844. [2022-01-31 20:42:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 839 states have (on average 1.1430274135876044) internal successors, (959), 839 states have internal predecessors, (959), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 963 transitions. [2022-01-31 20:42:28,665 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 963 transitions. Word has length 72 [2022-01-31 20:42:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:28,665 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 963 transitions. [2022-01-31 20:42:28,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 963 transitions. [2022-01-31 20:42:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 20:42:28,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:28,667 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:42:28,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 20:42:28,667 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 14 times [2022-01-31 20:42:28,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:28,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748368954] [2022-01-31 20:42:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:28,668 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:28,668 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:28,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:28,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:28,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:28,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748368954] [2022-01-31 20:42:28,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748368954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:28,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:28,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:42:28,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327433909] [2022-01-31 20:42:28,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:28,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:42:28,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:42:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:42:28,844 INFO L87 Difference]: Start difference. First operand 844 states and 963 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:32,966 INFO L93 Difference]: Finished difference Result 2412 states and 2797 transitions. [2022-01-31 20:42:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:42:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 20:42:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:32,971 INFO L225 Difference]: With dead ends: 2412 [2022-01-31 20:42:32,971 INFO L226 Difference]: Without dead ends: 2355 [2022-01-31 20:42:32,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:42:32,972 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 309 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:32,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 170 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:42:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-31 20:42:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 844. [2022-01-31 20:42:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 839 states have (on average 1.1430274135876044) internal successors, (959), 839 states have internal predecessors, (959), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 963 transitions. [2022-01-31 20:42:34,084 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 963 transitions. Word has length 73 [2022-01-31 20:42:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:34,084 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 963 transitions. [2022-01-31 20:42:34,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 963 transitions. [2022-01-31 20:42:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 20:42:34,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:34,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:34,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 20:42:34,086 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -505226483, now seen corresponding path program 15 times [2022-01-31 20:42:34,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:34,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629623698] [2022-01-31 20:42:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:34,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:34,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:34,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:34,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:34,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629623698] [2022-01-31 20:42:34,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1629623698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:34,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:34,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:42:34,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031866272] [2022-01-31 20:42:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:34,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:42:34,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:42:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:42:34,233 INFO L87 Difference]: Start difference. First operand 844 states and 963 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:36,678 INFO L93 Difference]: Finished difference Result 1498 states and 1727 transitions. [2022-01-31 20:42:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:42:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 74 [2022-01-31 20:42:36,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:36,684 INFO L225 Difference]: With dead ends: 1498 [2022-01-31 20:42:36,684 INFO L226 Difference]: Without dead ends: 1402 [2022-01-31 20:42:36,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:42:36,685 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 219 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:36,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 80 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:42:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-01-31 20:42:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 902. [2022-01-31 20:42:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 897 states have (on average 1.1426978818283167) internal successors, (1025), 897 states have internal predecessors, (1025), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1029 transitions. [2022-01-31 20:42:37,863 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1029 transitions. Word has length 74 [2022-01-31 20:42:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:37,864 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1029 transitions. [2022-01-31 20:42:37,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1029 transitions. [2022-01-31 20:42:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 20:42:37,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:37,865 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:42:37,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 20:42:37,865 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:37,865 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 16 times [2022-01-31 20:42:37,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:37,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805734432] [2022-01-31 20:42:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:37,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:37,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:37,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:37,868 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:38,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:38,026 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 20:42:38,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805734432] [2022-01-31 20:42:38,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805734432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:38,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:38,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:42:38,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791107378] [2022-01-31 20:42:38,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:38,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:42:38,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:42:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:42:38,027 INFO L87 Difference]: Start difference. First operand 902 states and 1029 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 20:42:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:42,788 INFO L93 Difference]: Finished difference Result 2735 states and 3173 transitions. [2022-01-31 20:42:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:42:42,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 75 [2022-01-31 20:42:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:42,796 INFO L225 Difference]: With dead ends: 2735 [2022-01-31 20:42:42,797 INFO L226 Difference]: Without dead ends: 2678 [2022-01-31 20:42:42,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:42:42,797 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:42,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 194 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:42:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-01-31 20:42:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 902. [2022-01-31 20:42:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 897 states have (on average 1.1426978818283167) internal successors, (1025), 897 states have internal predecessors, (1025), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1029 transitions. [2022-01-31 20:42:44,054 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1029 transitions. Word has length 75 [2022-01-31 20:42:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1029 transitions. [2022-01-31 20:42:44,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 20:42:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1029 transitions. [2022-01-31 20:42:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 20:42:44,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:44,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:44,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 20:42:44,056 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1267467800, now seen corresponding path program 17 times [2022-01-31 20:42:44,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327788440] [2022-01-31 20:42:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:44,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:44,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:44,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:44,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:44,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:44,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327788440] [2022-01-31 20:42:44,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327788440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:44,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:44,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:42:44,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452532888] [2022-01-31 20:42:44,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:44,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:42:44,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:42:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:42:44,195 INFO L87 Difference]: Start difference. First operand 902 states and 1029 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:47,298 INFO L93 Difference]: Finished difference Result 1870 states and 2160 transitions. [2022-01-31 20:42:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:42:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 76 [2022-01-31 20:42:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:47,304 INFO L225 Difference]: With dead ends: 1870 [2022-01-31 20:42:47,304 INFO L226 Difference]: Without dead ends: 1774 [2022-01-31 20:42:47,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:42:47,305 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 311 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:47,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 100 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:42:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2022-01-31 20:42:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 902. [2022-01-31 20:42:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 897 states have (on average 1.1426978818283167) internal successors, (1025), 897 states have internal predecessors, (1025), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1029 transitions. [2022-01-31 20:42:48,474 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1029 transitions. Word has length 76 [2022-01-31 20:42:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:48,475 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1029 transitions. [2022-01-31 20:42:48,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1029 transitions. [2022-01-31 20:42:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 20:42:48,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:48,476 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:42:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 20:42:48,476 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:48,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671001, now seen corresponding path program 8 times [2022-01-31 20:42:48,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627495831] [2022-01-31 20:42:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:48,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:48,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:48,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:48,479 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:48,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:48,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627495831] [2022-01-31 20:42:48,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [627495831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:48,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:48,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:42:48,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583597724] [2022-01-31 20:42:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:48,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:42:48,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:42:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:42:48,670 INFO L87 Difference]: Start difference. First operand 902 states and 1029 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:42:56,346 INFO L93 Difference]: Finished difference Result 4003 states and 4668 transitions. [2022-01-31 20:42:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:42:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 76 [2022-01-31 20:42:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:42:56,352 INFO L225 Difference]: With dead ends: 4003 [2022-01-31 20:42:56,352 INFO L226 Difference]: Without dead ends: 3959 [2022-01-31 20:42:56,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:42:56,355 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 449 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3856 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:42:56,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 309 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3856 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:42:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2022-01-31 20:42:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 904. [2022-01-31 20:42:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 899 states have (on average 1.1434927697441601) internal successors, (1028), 899 states have internal predecessors, (1028), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1032 transitions. [2022-01-31 20:42:57,675 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1032 transitions. Word has length 76 [2022-01-31 20:42:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:42:57,676 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1032 transitions. [2022-01-31 20:42:57,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:42:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1032 transitions. [2022-01-31 20:42:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 20:42:57,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:42:57,677 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:42:57,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 20:42:57,677 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:42:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:42:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 18 times [2022-01-31 20:42:57,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:42:57,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463995586] [2022-01-31 20:42:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:42:57,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:42:57,679 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:42:57,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:42:57,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:42:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:57,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:42:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:42:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:42:57,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:42:57,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463995586] [2022-01-31 20:42:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [463995586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:42:57,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:42:57,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:42:57,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75913363] [2022-01-31 20:42:57,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:42:57,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:42:57,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:42:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:42:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:42:57,851 INFO L87 Difference]: Start difference. First operand 904 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 20:43:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:03,948 INFO L93 Difference]: Finished difference Result 3060 states and 3552 transitions. [2022-01-31 20:43:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:43:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 77 [2022-01-31 20:43:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:03,953 INFO L225 Difference]: With dead ends: 3060 [2022-01-31 20:43:03,953 INFO L226 Difference]: Without dead ends: 3003 [2022-01-31 20:43:03,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:43:03,955 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 368 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:03,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 213 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:43:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-01-31 20:43:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 904. [2022-01-31 20:43:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 899 states have (on average 1.1434927697441601) internal successors, (1028), 899 states have internal predecessors, (1028), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1032 transitions. [2022-01-31 20:43:05,290 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1032 transitions. Word has length 77 [2022-01-31 20:43:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:05,290 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1032 transitions. [2022-01-31 20:43:05,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 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 20:43:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1032 transitions. [2022-01-31 20:43:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 20:43:05,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:05,292 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:05,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 20:43:05,292 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash 658034179, now seen corresponding path program 19 times [2022-01-31 20:43:05,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:05,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294500047] [2022-01-31 20:43:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:05,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:05,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:05,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:05,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:05,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:05,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294500047] [2022-01-31 20:43:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294500047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:05,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 20:43:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242123186] [2022-01-31 20:43:05,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 20:43:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 20:43:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-01-31 20:43:05,435 INFO L87 Difference]: Start difference. First operand 904 states and 1032 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:09,390 INFO L93 Difference]: Finished difference Result 2158 states and 2494 transitions. [2022-01-31 20:43:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:43:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 78 [2022-01-31 20:43:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:09,393 INFO L225 Difference]: With dead ends: 2158 [2022-01-31 20:43:09,394 INFO L226 Difference]: Without dead ends: 2062 [2022-01-31 20:43:09,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:43:09,396 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 291 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:09,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 133 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:43:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-01-31 20:43:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 904. [2022-01-31 20:43:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 899 states have (on average 1.1434927697441601) internal successors, (1028), 899 states have internal predecessors, (1028), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1032 transitions. [2022-01-31 20:43:10,655 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1032 transitions. Word has length 78 [2022-01-31 20:43:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:10,655 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1032 transitions. [2022-01-31 20:43:10,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1032 transitions. [2022-01-31 20:43:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 20:43:10,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:10,662 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:10,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 20:43:10,662 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -588794316, now seen corresponding path program 9 times [2022-01-31 20:43:10,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301995028] [2022-01-31 20:43:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:10,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:10,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:10,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:10,664 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:10,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301995028] [2022-01-31 20:43:10,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301995028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:10,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:10,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:43:10,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568764194] [2022-01-31 20:43:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:10,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:43:10,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:43:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:43:10,915 INFO L87 Difference]: Start difference. First operand 904 states and 1032 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:20,602 INFO L93 Difference]: Finished difference Result 4608 states and 5376 transitions. [2022-01-31 20:43:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:43:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 78 [2022-01-31 20:43:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:20,611 INFO L225 Difference]: With dead ends: 4608 [2022-01-31 20:43:20,611 INFO L226 Difference]: Without dead ends: 4564 [2022-01-31 20:43:20,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:43:20,614 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 545 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5073 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 5106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:20,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 343 Invalid, 5106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5073 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:43:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2022-01-31 20:43:21,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 908. [2022-01-31 20:43:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 903 states have (on average 1.1450719822812847) internal successors, (1034), 903 states have internal predecessors, (1034), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1038 transitions. [2022-01-31 20:43:21,907 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1038 transitions. Word has length 78 [2022-01-31 20:43:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:21,907 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1038 transitions. [2022-01-31 20:43:21,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1038 transitions. [2022-01-31 20:43:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 20:43:21,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:21,908 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:43:21,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 20:43:21,909 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 20 times [2022-01-31 20:43:21,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:21,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883896805] [2022-01-31 20:43:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:21,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:21,911 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:21,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:21,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:22,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:22,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883896805] [2022-01-31 20:43:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [883896805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:22,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:22,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:43:22,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259621571] [2022-01-31 20:43:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:22,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:43:22,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:43:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:43:22,124 INFO L87 Difference]: Start difference. First operand 908 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 20:43:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:28,994 INFO L93 Difference]: Finished difference Result 3387 states and 3934 transitions. [2022-01-31 20:43:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:43:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 79 [2022-01-31 20:43:28,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:28,998 INFO L225 Difference]: With dead ends: 3387 [2022-01-31 20:43:28,998 INFO L226 Difference]: Without dead ends: 3330 [2022-01-31 20:43:28,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:43:28,999 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 407 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:28,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:43:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-01-31 20:43:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 908. [2022-01-31 20:43:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 903 states have (on average 1.1450719822812847) internal successors, (1034), 903 states have internal predecessors, (1034), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1038 transitions. [2022-01-31 20:43:30,290 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1038 transitions. Word has length 79 [2022-01-31 20:43:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:30,290 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1038 transitions. [2022-01-31 20:43:30,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 20:43:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1038 transitions. [2022-01-31 20:43:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 20:43:30,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:30,291 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:30,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 20:43:30,291 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:30,291 INFO L85 PathProgramCache]: Analyzing trace with hash -65468578, now seen corresponding path program 21 times [2022-01-31 20:43:30,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:30,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085042423] [2022-01-31 20:43:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:30,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:30,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:30,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:30,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:30,435 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 20:43:30,435 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:30,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085042423] [2022-01-31 20:43:30,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2085042423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:30,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:30,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:43:30,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920685088] [2022-01-31 20:43:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:30,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:43:30,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:43:30,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:43:30,436 INFO L87 Difference]: Start difference. First operand 908 states and 1038 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:35,483 INFO L93 Difference]: Finished difference Result 2528 states and 2927 transitions. [2022-01-31 20:43:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:43:35,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 80 [2022-01-31 20:43:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:35,487 INFO L225 Difference]: With dead ends: 2528 [2022-01-31 20:43:35,487 INFO L226 Difference]: Without dead ends: 2432 [2022-01-31 20:43:35,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:43:35,487 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 408 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:35,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 141 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:43:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-01-31 20:43:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 908. [2022-01-31 20:43:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 903 states have (on average 1.1450719822812847) internal successors, (1034), 903 states have internal predecessors, (1034), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1038 transitions. [2022-01-31 20:43:36,792 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1038 transitions. Word has length 80 [2022-01-31 20:43:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:36,792 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1038 transitions. [2022-01-31 20:43:36,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1038 transitions. [2022-01-31 20:43:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 20:43:36,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:36,794 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:36,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 20:43:36,794 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 22 times [2022-01-31 20:43:36,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:36,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565731331] [2022-01-31 20:43:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:36,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:36,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:36,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:36,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:36,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:36,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565731331] [2022-01-31 20:43:36,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [565731331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:36,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:36,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 20:43:36,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4063532] [2022-01-31 20:43:36,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:36,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 20:43:36,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 20:43:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:43:36,889 INFO L87 Difference]: Start difference. First operand 908 states and 1038 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 20:43:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:38,125 INFO L93 Difference]: Finished difference Result 1102 states and 1255 transitions. [2022-01-31 20:43:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 20:43:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 81 [2022-01-31 20:43:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:38,127 INFO L225 Difference]: With dead ends: 1102 [2022-01-31 20:43:38,127 INFO L226 Difference]: Without dead ends: 622 [2022-01-31 20:43:38,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:43:38,128 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:38,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 56 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:43:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-31 20:43:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 565. [2022-01-31 20:43:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 560 states have (on average 1.1482142857142856) internal successors, (643), 560 states have internal predecessors, (643), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 647 transitions. [2022-01-31 20:43:39,003 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 647 transitions. Word has length 81 [2022-01-31 20:43:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:39,003 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 647 transitions. [2022-01-31 20:43:39,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 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 20:43:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 647 transitions. [2022-01-31 20:43:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 20:43:39,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:39,004 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 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 20:43:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 20:43:39,004 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:39,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 23 times [2022-01-31 20:43:39,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:39,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116725463] [2022-01-31 20:43:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:39,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:39,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:39,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:39,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:39,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:39,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:39,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116725463] [2022-01-31 20:43:39,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116725463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:39,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:39,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:43:39,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493372764] [2022-01-31 20:43:39,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:39,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:43:39,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:43:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:43:39,206 INFO L87 Difference]: Start difference. First operand 565 states and 647 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 20:43:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:46,894 INFO L93 Difference]: Finished difference Result 3344 states and 3890 transitions. [2022-01-31 20:43:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:43:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 81 [2022-01-31 20:43:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:46,898 INFO L225 Difference]: With dead ends: 3344 [2022-01-31 20:43:46,898 INFO L226 Difference]: Without dead ends: 3287 [2022-01-31 20:43:46,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:43:46,899 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 430 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:46,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 266 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:43:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2022-01-31 20:43:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 565. [2022-01-31 20:43:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 560 states have (on average 1.1482142857142856) internal successors, (643), 560 states have internal predecessors, (643), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 647 transitions. [2022-01-31 20:43:47,808 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 647 transitions. Word has length 81 [2022-01-31 20:43:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 647 transitions. [2022-01-31 20:43:47,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 20:43:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 647 transitions. [2022-01-31 20:43:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 20:43:47,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:47,809 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:47,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 20:43:47,809 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 24 times [2022-01-31 20:43:47,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201082832] [2022-01-31 20:43:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:47,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:47,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:47,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:47,812 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:48,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:48,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201082832] [2022-01-31 20:43:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201082832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:48,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:43:48,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59640106] [2022-01-31 20:43:48,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:48,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:43:48,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:43:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:43:48,371 INFO L87 Difference]: Start difference. First operand 565 states and 647 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 20:43:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:49,733 INFO L93 Difference]: Finished difference Result 612 states and 698 transitions. [2022-01-31 20:43:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:43:49,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 82 [2022-01-31 20:43:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:49,734 INFO L225 Difference]: With dead ends: 612 [2022-01-31 20:43:49,734 INFO L226 Difference]: Without dead ends: 407 [2022-01-31 20:43:49,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 20:43:49,735 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 177 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:49,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 82 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:43:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-31 20:43:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-01-31 20:43:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.1840796019900497) internal successors, (476), 402 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 480 transitions. [2022-01-31 20:43:50,425 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 480 transitions. Word has length 82 [2022-01-31 20:43:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:50,425 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 480 transitions. [2022-01-31 20:43:50,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 20:43:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 480 transitions. [2022-01-31 20:43:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 20:43:50,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:50,426 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:50,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 20:43:50,426 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:50,427 INFO L85 PathProgramCache]: Analyzing trace with hash 433083897, now seen corresponding path program 25 times [2022-01-31 20:43:50,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:50,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736914467] [2022-01-31 20:43:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:50,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:50,428 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:50,429 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:50,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:50,607 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 20:43:50,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:50,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736914467] [2022-01-31 20:43:50,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1736914467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:50,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:50,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:43:50,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288184851] [2022-01-31 20:43:50,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:50,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:43:50,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:43:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:43:50,608 INFO L87 Difference]: Start difference. First operand 407 states and 480 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:43:55,803 INFO L93 Difference]: Finished difference Result 2246 states and 2622 transitions. [2022-01-31 20:43:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:43:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 82 [2022-01-31 20:43:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:43:55,806 INFO L225 Difference]: With dead ends: 2246 [2022-01-31 20:43:55,806 INFO L226 Difference]: Without dead ends: 2150 [2022-01-31 20:43:55,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:43:55,806 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 325 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:43:55,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 172 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:43:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2022-01-31 20:43:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 407. [2022-01-31 20:43:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.1840796019900497) internal successors, (476), 402 states have internal predecessors, (476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 480 transitions. [2022-01-31 20:43:56,513 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 480 transitions. Word has length 82 [2022-01-31 20:43:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:43:56,514 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 480 transitions. [2022-01-31 20:43:56,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:43:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 480 transitions. [2022-01-31 20:43:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 20:43:56,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:43:56,514 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:43:56,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 20:43:56,514 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:43:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:43:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -813744598, now seen corresponding path program 10 times [2022-01-31 20:43:56,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:43:56,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915023134] [2022-01-31 20:43:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:43:56,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:43:56,517 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:43:56,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:43:56,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:43:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:56,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:43:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:43:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:43:56,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:43:56,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915023134] [2022-01-31 20:43:56,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [915023134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:43:56,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:43:56,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:43:56,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191352375] [2022-01-31 20:43:56,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:43:56,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:43:56,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:43:56,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:43:56,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:43:56,785 INFO L87 Difference]: Start difference. First operand 407 states and 480 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:09,100 INFO L93 Difference]: Finished difference Result 4696 states and 5504 transitions. [2022-01-31 20:44:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:44:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 82 [2022-01-31 20:44:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:09,105 INFO L225 Difference]: With dead ends: 4696 [2022-01-31 20:44:09,105 INFO L226 Difference]: Without dead ends: 4652 [2022-01-31 20:44:09,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:44:09,106 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 587 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:09,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 372 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 6154 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 20:44:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4652 states. [2022-01-31 20:44:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4652 to 411. [2022-01-31 20:44:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 406 states have (on average 1.187192118226601) internal successors, (482), 406 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 486 transitions. [2022-01-31 20:44:09,995 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 486 transitions. Word has length 82 [2022-01-31 20:44:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:09,995 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 486 transitions. [2022-01-31 20:44:09,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 486 transitions. [2022-01-31 20:44:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 20:44:09,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:09,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:09,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 20:44:09,997 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 26 times [2022-01-31 20:44:09,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:09,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956835510] [2022-01-31 20:44:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:09,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:09,999 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:09,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:10,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:10,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:10,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:10,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956835510] [2022-01-31 20:44:10,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956835510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:10,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:10,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:44:10,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270219766] [2022-01-31 20:44:10,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:10,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:44:10,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:44:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:44:10,320 INFO L87 Difference]: Start difference. First operand 411 states and 486 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:12,221 INFO L93 Difference]: Finished difference Result 670 states and 790 transitions. [2022-01-31 20:44:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:44:12,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 83 [2022-01-31 20:44:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:12,222 INFO L225 Difference]: With dead ends: 670 [2022-01-31 20:44:12,222 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 20:44:12,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:44:12,225 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 164 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:12,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 82 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:44:12,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 20:44:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 460. [2022-01-31 20:44:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.1846153846153846) internal successors, (539), 455 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 543 transitions. [2022-01-31 20:44:13,215 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 543 transitions. Word has length 83 [2022-01-31 20:44:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:13,216 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 543 transitions. [2022-01-31 20:44:13,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 543 transitions. [2022-01-31 20:44:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:44:13,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:13,216 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:13,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 20:44:13,217 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 27 times [2022-01-31 20:44:13,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:13,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154473405] [2022-01-31 20:44:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:13,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:13,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:13,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:13,219 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:13,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:13,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154473405] [2022-01-31 20:44:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154473405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:13,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:13,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:44:13,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030589304] [2022-01-31 20:44:13,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:13,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:44:13,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:44:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:44:13,362 INFO L87 Difference]: Start difference. First operand 460 states and 543 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 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 20:44:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:15,807 INFO L93 Difference]: Finished difference Result 764 states and 897 transitions. [2022-01-31 20:44:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:44:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 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 93 [2022-01-31 20:44:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:15,808 INFO L225 Difference]: With dead ends: 764 [2022-01-31 20:44:15,809 INFO L226 Difference]: Without dead ends: 759 [2022-01-31 20:44:15,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:44:15,810 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 249 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:15,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 188 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:44:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-31 20:44:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 551. [2022-01-31 20:44:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 546 states have (on average 1.1813186813186813) internal successors, (645), 546 states have internal predecessors, (645), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 649 transitions. [2022-01-31 20:44:17,272 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 649 transitions. Word has length 93 [2022-01-31 20:44:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:17,272 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 649 transitions. [2022-01-31 20:44:17,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 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 20:44:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 649 transitions. [2022-01-31 20:44:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:44:17,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:17,273 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:17,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 20:44:17,273 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 28 times [2022-01-31 20:44:17,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:17,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761734176] [2022-01-31 20:44:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:17,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:17,274 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:17,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:17,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:18,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:18,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:18,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761734176] [2022-01-31 20:44:18,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [761734176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:18,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:18,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:44:18,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94169026] [2022-01-31 20:44:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:18,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:44:18,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:44:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:44:18,664 INFO L87 Difference]: Start difference. First operand 551 states and 649 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 20:44:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:23,878 INFO L93 Difference]: Finished difference Result 1859 states and 2173 transitions. [2022-01-31 20:44:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:44:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 93 [2022-01-31 20:44:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:23,880 INFO L225 Difference]: With dead ends: 1859 [2022-01-31 20:44:23,880 INFO L226 Difference]: Without dead ends: 1522 [2022-01-31 20:44:23,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:44:23,883 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 276 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:23,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 99 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:44:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-01-31 20:44:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 874. [2022-01-31 20:44:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 869 states have (on average 1.1553509781357882) internal successors, (1004), 869 states have internal predecessors, (1004), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1008 transitions. [2022-01-31 20:44:25,934 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1008 transitions. Word has length 93 [2022-01-31 20:44:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:25,935 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1008 transitions. [2022-01-31 20:44:25,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 20:44:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1008 transitions. [2022-01-31 20:44:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:44:25,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:25,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:25,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 20:44:25,937 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1642709553, now seen corresponding path program 29 times [2022-01-31 20:44:25,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:25,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734653725] [2022-01-31 20:44:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:25,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:25,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:25,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:25,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:27,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:27,338 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734653725] [2022-01-31 20:44:27,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734653725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:27,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:27,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:44:27,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559028293] [2022-01-31 20:44:27,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:27,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:44:27,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:27,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:44:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:44:27,342 INFO L87 Difference]: Start difference. First operand 874 states and 1008 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 20:44:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:32,907 INFO L93 Difference]: Finished difference Result 1910 states and 2201 transitions. [2022-01-31 20:44:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:44:32,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 93 [2022-01-31 20:44:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:32,910 INFO L225 Difference]: With dead ends: 1910 [2022-01-31 20:44:32,910 INFO L226 Difference]: Without dead ends: 1768 [2022-01-31 20:44:32,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:44:32,915 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 263 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:32,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 57 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:44:32,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-01-31 20:44:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1231. [2022-01-31 20:44:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1226 states have (on average 1.1484502446982054) internal successors, (1408), 1226 states have internal predecessors, (1408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1412 transitions. [2022-01-31 20:44:35,844 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1412 transitions. Word has length 93 [2022-01-31 20:44:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:35,844 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 1412 transitions. [2022-01-31 20:44:35,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 20:44:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1412 transitions. [2022-01-31 20:44:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:44:35,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:35,846 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:35,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 20:44:35,846 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:35,846 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 30 times [2022-01-31 20:44:35,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124768034] [2022-01-31 20:44:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:35,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:35,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:35,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:35,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:37,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:37,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124768034] [2022-01-31 20:44:37,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124768034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:37,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:37,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:44:37,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016957126] [2022-01-31 20:44:37,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:37,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:44:37,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:44:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:44:37,430 INFO L87 Difference]: Start difference. First operand 1231 states and 1412 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:44,578 INFO L93 Difference]: Finished difference Result 2400 states and 2770 transitions. [2022-01-31 20:44:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:44:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 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 93 [2022-01-31 20:44:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:44,581 INFO L225 Difference]: With dead ends: 2400 [2022-01-31 20:44:44,581 INFO L226 Difference]: Without dead ends: 2321 [2022-01-31 20:44:44,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:44:44,583 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 208 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:44,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 121 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:44:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-01-31 20:44:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1690. [2022-01-31 20:44:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1685 states have (on average 1.1525222551928784) internal successors, (1942), 1685 states have internal predecessors, (1942), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1946 transitions. [2022-01-31 20:44:48,640 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1946 transitions. Word has length 93 [2022-01-31 20:44:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:44:48,640 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 1946 transitions. [2022-01-31 20:44:48,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:44:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1946 transitions. [2022-01-31 20:44:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:44:48,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:44:48,642 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:44:48,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 20:44:48,642 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:44:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:44:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 31 times [2022-01-31 20:44:48,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:44:48,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647563717] [2022-01-31 20:44:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:44:48,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:44:48,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:44:48,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:44:48,653 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:44:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:49,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:44:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:44:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:44:49,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:44:49,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647563717] [2022-01-31 20:44:49,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647563717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:44:49,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:44:49,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:44:49,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599834622] [2022-01-31 20:44:49,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:44:49,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:44:49,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:44:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:44:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:44:49,884 INFO L87 Difference]: Start difference. First operand 1690 states and 1946 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 20:44:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:44:56,944 INFO L93 Difference]: Finished difference Result 3060 states and 3546 transitions. [2022-01-31 20:44:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:44:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 93 [2022-01-31 20:44:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:44:56,961 INFO L225 Difference]: With dead ends: 3060 [2022-01-31 20:44:56,961 INFO L226 Difference]: Without dead ends: 2216 [2022-01-31 20:44:56,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:44:56,969 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 245 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:44:56,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 76 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:44:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2022-01-31 20:45:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1968. [2022-01-31 20:45:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1963 states have (on average 1.1380539989811513) internal successors, (2234), 1963 states have internal predecessors, (2234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2238 transitions. [2022-01-31 20:45:02,048 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2238 transitions. Word has length 93 [2022-01-31 20:45:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:02,048 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2238 transitions. [2022-01-31 20:45:02,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 20:45:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2238 transitions. [2022-01-31 20:45:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:45:02,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:02,050 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:02,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 20:45:02,051 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 32 times [2022-01-31 20:45:02,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559452484] [2022-01-31 20:45:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:02,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:02,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:02,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:02,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:03,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:03,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:03,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559452484] [2022-01-31 20:45:03,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559452484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:03,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:03,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:45:03,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595290952] [2022-01-31 20:45:03,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:03,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:45:03,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:03,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:45:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:45:03,688 INFO L87 Difference]: Start difference. First operand 1968 states and 2238 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:10,672 INFO L93 Difference]: Finished difference Result 2388 states and 2720 transitions. [2022-01-31 20:45:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 20:45:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 93 [2022-01-31 20:45:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:10,674 INFO L225 Difference]: With dead ends: 2388 [2022-01-31 20:45:10,674 INFO L226 Difference]: Without dead ends: 1907 [2022-01-31 20:45:10,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:45:10,677 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 283 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:10,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 55 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:45:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-01-31 20:45:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1676. [2022-01-31 20:45:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1671 states have (on average 1.1340514661879115) internal successors, (1895), 1671 states have internal predecessors, (1895), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 1899 transitions. [2022-01-31 20:45:14,918 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 1899 transitions. Word has length 93 [2022-01-31 20:45:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:14,934 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 1899 transitions. [2022-01-31 20:45:14,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 1899 transitions. [2022-01-31 20:45:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:45:14,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:14,937 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:14,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 20:45:14,937 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:14,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1261895563, now seen corresponding path program 33 times [2022-01-31 20:45:14,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:14,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413035982] [2022-01-31 20:45:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:14,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:14,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:14,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:14,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:16,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:16,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:16,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413035982] [2022-01-31 20:45:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [413035982] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:16,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:16,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 20:45:16,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808261213] [2022-01-31 20:45:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 20:45:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 20:45:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-31 20:45:16,422 INFO L87 Difference]: Start difference. First operand 1676 states and 1899 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:23,343 INFO L93 Difference]: Finished difference Result 2319 states and 2616 transitions. [2022-01-31 20:45:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:45:23,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 93 [2022-01-31 20:45:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:23,346 INFO L225 Difference]: With dead ends: 2319 [2022-01-31 20:45:23,346 INFO L226 Difference]: Without dead ends: 2149 [2022-01-31 20:45:23,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:45:23,347 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 227 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:23,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 67 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:45:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2022-01-31 20:45:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1971. [2022-01-31 20:45:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1966 states have (on average 1.1266531027466937) internal successors, (2215), 1966 states have internal predecessors, (2215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2219 transitions. [2022-01-31 20:45:28,208 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2219 transitions. Word has length 93 [2022-01-31 20:45:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:28,208 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 2219 transitions. [2022-01-31 20:45:28,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2219 transitions. [2022-01-31 20:45:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:45:28,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:28,211 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:28,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 20:45:28,211 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1038747787, now seen corresponding path program 34 times [2022-01-31 20:45:28,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:28,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950459344] [2022-01-31 20:45:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:28,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:28,212 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:28,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:28,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:29,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:29,252 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 20:45:29,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:29,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950459344] [2022-01-31 20:45:29,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950459344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:29,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:29,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:45:29,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251388538] [2022-01-31 20:45:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:29,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:45:29,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:29,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:45:29,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:45:29,253 INFO L87 Difference]: Start difference. First operand 1971 states and 2219 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 20:45:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:35,997 INFO L93 Difference]: Finished difference Result 2252 states and 2526 transitions. [2022-01-31 20:45:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:45:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 93 [2022-01-31 20:45:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:36,000 INFO L225 Difference]: With dead ends: 2252 [2022-01-31 20:45:36,000 INFO L226 Difference]: Without dead ends: 2129 [2022-01-31 20:45:36,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:45:36,001 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 206 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:36,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 85 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:45:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-31 20:45:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1971. [2022-01-31 20:45:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1966 states have (on average 1.1215666327568667) internal successors, (2205), 1966 states have internal predecessors, (2205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2209 transitions. [2022-01-31 20:45:41,014 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2209 transitions. Word has length 93 [2022-01-31 20:45:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:41,014 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 2209 transitions. [2022-01-31 20:45:41,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 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 20:45:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2209 transitions. [2022-01-31 20:45:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:45:41,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:41,017 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:41,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 20:45:41,017 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 50957903, now seen corresponding path program 35 times [2022-01-31 20:45:41,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189150505] [2022-01-31 20:45:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:41,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:41,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:41,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:41,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:42,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:42,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189150505] [2022-01-31 20:45:42,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189150505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:42,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:42,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:45:42,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039332044] [2022-01-31 20:45:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:42,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:45:42,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:45:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:45:42,193 INFO L87 Difference]: Start difference. First operand 1971 states and 2209 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 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 20:45:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:45:49,428 INFO L93 Difference]: Finished difference Result 2619 states and 2935 transitions. [2022-01-31 20:45:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:45:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 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 93 [2022-01-31 20:45:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:45:49,431 INFO L225 Difference]: With dead ends: 2619 [2022-01-31 20:45:49,431 INFO L226 Difference]: Without dead ends: 2492 [2022-01-31 20:45:49,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:45:49,432 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 205 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:45:49,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 69 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:45:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-01-31 20:45:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2251. [2022-01-31 20:45:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2246 states have (on average 1.1237756010685664) internal successors, (2524), 2246 states have internal predecessors, (2524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:45:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 2528 transitions. [2022-01-31 20:45:55,000 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 2528 transitions. Word has length 93 [2022-01-31 20:45:55,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:45:55,000 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 2528 transitions. [2022-01-31 20:45:55,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 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 20:45:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 2528 transitions. [2022-01-31 20:45:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:45:55,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:45:55,003 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:45:55,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 20:45:55,003 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:45:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:45:55,003 INFO L85 PathProgramCache]: Analyzing trace with hash -349686637, now seen corresponding path program 36 times [2022-01-31 20:45:55,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:45:55,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106907002] [2022-01-31 20:45:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:45:55,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:45:55,004 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:45:55,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:45:55,005 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:45:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:45:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:45:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:45:55,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:45:55,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106907002] [2022-01-31 20:45:55,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [106907002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:45:55,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:45:55,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:45:55,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895169975] [2022-01-31 20:45:55,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:45:55,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:45:55,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:45:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:45:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:45:55,958 INFO L87 Difference]: Start difference. First operand 2251 states and 2528 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:03,069 INFO L93 Difference]: Finished difference Result 2937 states and 3260 transitions. [2022-01-31 20:46:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:46:03,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 93 [2022-01-31 20:46:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:03,072 INFO L225 Difference]: With dead ends: 2937 [2022-01-31 20:46:03,072 INFO L226 Difference]: Without dead ends: 2578 [2022-01-31 20:46:03,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:46:03,073 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 142 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:03,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 64 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 20:46:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-01-31 20:46:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2145. [2022-01-31 20:46:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2140 states have (on average 1.1149532710280374) internal successors, (2386), 2140 states have internal predecessors, (2386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2390 transitions. [2022-01-31 20:46:08,272 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2390 transitions. Word has length 93 [2022-01-31 20:46:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:08,272 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 2390 transitions. [2022-01-31 20:46:08,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2390 transitions. [2022-01-31 20:46:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 20:46:08,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:08,274 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 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 20:46:08,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 20:46:08,275 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash -102388934, now seen corresponding path program 37 times [2022-01-31 20:46:08,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709672420] [2022-01-31 20:46:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:08,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:08,276 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:08,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:08,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:08,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709672420] [2022-01-31 20:46:08,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [709672420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:08,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:08,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:46:08,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430744776] [2022-01-31 20:46:08,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:08,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:46:08,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:46:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:46:08,519 INFO L87 Difference]: Start difference. First operand 2145 states and 2390 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 20:46:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:29,360 INFO L93 Difference]: Finished difference Result 8035 states and 9226 transitions. [2022-01-31 20:46:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:46:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 93 [2022-01-31 20:46:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:29,369 INFO L225 Difference]: With dead ends: 8035 [2022-01-31 20:46:29,369 INFO L226 Difference]: Without dead ends: 7968 [2022-01-31 20:46:29,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:46:29,370 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 448 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3287 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:29,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 266 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3287 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:46:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2022-01-31 20:46:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 2145. [2022-01-31 20:46:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2140 states have (on average 1.1149532710280374) internal successors, (2386), 2140 states have internal predecessors, (2386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2390 transitions. [2022-01-31 20:46:34,891 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2390 transitions. Word has length 93 [2022-01-31 20:46:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:34,891 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 2390 transitions. [2022-01-31 20:46:34,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 20:46:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2390 transitions. [2022-01-31 20:46:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 20:46:34,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:34,893 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:34,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 20:46:34,894 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash -291944894, now seen corresponding path program 38 times [2022-01-31 20:46:34,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:34,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167057498] [2022-01-31 20:46:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:34,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:34,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:34,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:34,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:35,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167057498] [2022-01-31 20:46:35,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167057498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:35,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:35,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:46:35,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732717] [2022-01-31 20:46:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:35,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:46:35,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:46:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:46:35,101 INFO L87 Difference]: Start difference. First operand 2145 states and 2390 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:46:50,301 INFO L93 Difference]: Finished difference Result 5802 states and 6618 transitions. [2022-01-31 20:46:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:46:50,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 94 [2022-01-31 20:46:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:46:50,307 INFO L225 Difference]: With dead ends: 5802 [2022-01-31 20:46:50,307 INFO L226 Difference]: Without dead ends: 5658 [2022-01-31 20:46:50,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:46:50,308 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 361 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:46:50,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 184 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:46:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2022-01-31 20:46:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 2145. [2022-01-31 20:46:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2140 states have (on average 1.1149532710280374) internal successors, (2386), 2140 states have internal predecessors, (2386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2390 transitions. [2022-01-31 20:46:56,003 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2390 transitions. Word has length 94 [2022-01-31 20:46:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:46:56,003 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 2390 transitions. [2022-01-31 20:46:56,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:46:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2390 transitions. [2022-01-31 20:46:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:46:56,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:46:56,006 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:46:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 20:46:56,006 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:46:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:46:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1595514260, now seen corresponding path program 39 times [2022-01-31 20:46:56,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:46:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744169605] [2022-01-31 20:46:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:46:56,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:46:56,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:46:56,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:46:56,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:46:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:56,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:46:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:46:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:46:56,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:46:56,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744169605] [2022-01-31 20:46:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [744169605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:46:56,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:46:56,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 20:46:56,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699043918] [2022-01-31 20:46:56,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:46:56,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 20:46:56,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:46:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 20:46:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-31 20:46:56,173 INFO L87 Difference]: Start difference. First operand 2145 states and 2390 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 20:47:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:05,072 INFO L93 Difference]: Finished difference Result 3533 states and 3997 transitions. [2022-01-31 20:47:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:47:05,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 95 [2022-01-31 20:47:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:05,076 INFO L225 Difference]: With dead ends: 3533 [2022-01-31 20:47:05,076 INFO L226 Difference]: Without dead ends: 3309 [2022-01-31 20:47:05,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:47:05,076 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 274 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:05,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 99 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:47:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2022-01-31 20:47:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2314. [2022-01-31 20:47:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2309 states have (on average 1.1177999133824166) internal successors, (2581), 2309 states have internal predecessors, (2581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2585 transitions. [2022-01-31 20:47:10,870 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2585 transitions. Word has length 95 [2022-01-31 20:47:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:10,870 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 2585 transitions. [2022-01-31 20:47:10,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 20:47:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2585 transitions. [2022-01-31 20:47:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 20:47:10,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:10,873 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 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 20:47:10,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 20:47:10,873 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1917202559, now seen corresponding path program 40 times [2022-01-31 20:47:10,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:10,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371542419] [2022-01-31 20:47:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:10,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:10,876 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:10,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:10,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:11,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:11,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371542419] [2022-01-31 20:47:11,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [371542419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:11,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:11,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:47:11,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071893351] [2022-01-31 20:47:11,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:11,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:47:11,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:47:11,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:47:11,154 INFO L87 Difference]: Start difference. First operand 2314 states and 2585 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 20:47:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:47:35,918 INFO L93 Difference]: Finished difference Result 8840 states and 10153 transitions. [2022-01-31 20:47:35,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:47:35,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 95 [2022-01-31 20:47:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:47:35,927 INFO L225 Difference]: With dead ends: 8840 [2022-01-31 20:47:35,927 INFO L226 Difference]: Without dead ends: 8773 [2022-01-31 20:47:35,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:47:35,943 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 460 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:47:35,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 295 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4096 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:47:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2022-01-31 20:47:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 2314. [2022-01-31 20:47:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2309 states have (on average 1.1177999133824166) internal successors, (2581), 2309 states have internal predecessors, (2581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:47:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2585 transitions. [2022-01-31 20:47:42,027 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2585 transitions. Word has length 95 [2022-01-31 20:47:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:47:42,027 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 2585 transitions. [2022-01-31 20:47:42,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 20:47:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2585 transitions. [2022-01-31 20:47:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 20:47:42,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:47:42,030 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:47:42,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 20:47:42,031 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:47:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:47:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 41 times [2022-01-31 20:47:42,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:47:42,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759031245] [2022-01-31 20:47:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:47:42,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:47:42,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:47:42,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:47:42,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:47:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:47:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:47:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:47:42,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:47:42,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759031245] [2022-01-31 20:47:42,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759031245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:47:42,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:47:42,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:47:42,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066962059] [2022-01-31 20:47:42,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:47:42,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:47:42,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:47:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:47:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:47:42,266 INFO L87 Difference]: Start difference. First operand 2314 states and 2585 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:00,663 INFO L93 Difference]: Finished difference Result 6607 states and 7545 transitions. [2022-01-31 20:48:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 20:48:00,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 96 [2022-01-31 20:48:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:00,670 INFO L225 Difference]: With dead ends: 6607 [2022-01-31 20:48:00,670 INFO L226 Difference]: Without dead ends: 6463 [2022-01-31 20:48:00,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:48:00,671 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 394 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:00,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 200 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:48:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6463 states. [2022-01-31 20:48:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 2314. [2022-01-31 20:48:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2309 states have (on average 1.1177999133824166) internal successors, (2581), 2309 states have internal predecessors, (2581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 2585 transitions. [2022-01-31 20:48:06,747 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 2585 transitions. Word has length 96 [2022-01-31 20:48:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:06,747 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 2585 transitions. [2022-01-31 20:48:06,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 2585 transitions. [2022-01-31 20:48:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 20:48:06,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:06,749 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:06,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 20:48:06,750 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:06,750 INFO L85 PathProgramCache]: Analyzing trace with hash -861947120, now seen corresponding path program 11 times [2022-01-31 20:48:06,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:06,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896173596] [2022-01-31 20:48:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:06,751 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:06,751 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:06,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:06,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:07,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:07,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896173596] [2022-01-31 20:48:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [896173596] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:07,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:07,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 20:48:07,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119607320] [2022-01-31 20:48:07,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 20:48:07,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:07,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 20:48:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-01-31 20:48:07,114 INFO L87 Difference]: Start difference. First operand 2314 states and 2585 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:48:45,096 INFO L93 Difference]: Finished difference Result 12799 states and 14771 transitions. [2022-01-31 20:48:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:48:45,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 96 [2022-01-31 20:48:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:48:45,110 INFO L225 Difference]: With dead ends: 12799 [2022-01-31 20:48:45,110 INFO L226 Difference]: Without dead ends: 12732 [2022-01-31 20:48:45,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1926, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:48:45,112 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 657 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 7758 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 7796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 7758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:48:45,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 420 Invalid, 7796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 7758 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:48:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12732 states. [2022-01-31 20:48:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12732 to 2318. [2022-01-31 20:48:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:48:51,373 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 96 [2022-01-31 20:48:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:48:51,373 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:48:51,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:48:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:48:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 20:48:51,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:48:51,376 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:48:51,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 20:48:51,376 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:48:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:48:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1097721241, now seen corresponding path program 42 times [2022-01-31 20:48:51,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:48:51,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630066421] [2022-01-31 20:48:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:48:51,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:48:51,377 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:48:51,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:48:51,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:48:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:51,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:48:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:48:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:48:51,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:48:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630066421] [2022-01-31 20:48:51,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [630066421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:48:51,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:48:51,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:48:51,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056350746] [2022-01-31 20:48:51,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:48:51,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 20:48:51,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:48:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 20:48:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-31 20:48:51,531 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 20:49:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:03,567 INFO L93 Difference]: Finished difference Result 4348 states and 4936 transitions. [2022-01-31 20:49:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 20:49:03,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 97 [2022-01-31 20:49:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:03,572 INFO L225 Difference]: With dead ends: 4348 [2022-01-31 20:49:03,572 INFO L226 Difference]: Without dead ends: 4124 [2022-01-31 20:49:03,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:49:03,575 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 352 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:03,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 128 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 20:49:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2022-01-31 20:49:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 2318. [2022-01-31 20:49:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:49:09,944 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 97 [2022-01-31 20:49:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:09,944 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:49:09,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 20:49:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:49:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 20:49:09,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:09,947 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 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 20:49:09,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 20:49:09,947 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1419409540, now seen corresponding path program 43 times [2022-01-31 20:49:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:09,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309893343] [2022-01-31 20:49:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:09,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:09,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:09,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:09,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:10,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:10,368 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 20:49:10,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:10,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309893343] [2022-01-31 20:49:10,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [309893343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:10,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:49:10,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594564713] [2022-01-31 20:49:10,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:10,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:49:10,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:49:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:49:10,370 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 20:49:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:49:39,512 INFO L93 Difference]: Finished difference Result 9649 states and 11086 transitions. [2022-01-31 20:49:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:49:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 97 [2022-01-31 20:49:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:49:39,521 INFO L225 Difference]: With dead ends: 9649 [2022-01-31 20:49:39,521 INFO L226 Difference]: Without dead ends: 9582 [2022-01-31 20:49:39,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:49:39,530 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 508 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4477 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:49:39,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 314 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4477 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:49:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9582 states. [2022-01-31 20:49:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9582 to 2318. [2022-01-31 20:49:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:49:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:49:45,635 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 97 [2022-01-31 20:49:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:49:45,635 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:49:45,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 20:49:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:49:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 20:49:45,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:49:45,638 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:49:45,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 20:49:45,638 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:49:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:49:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 44 times [2022-01-31 20:49:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:49:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690249152] [2022-01-31 20:49:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:49:45,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:49:45,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:49:45,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:49:45,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:49:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:49:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:49:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:49:45,850 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:49:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690249152] [2022-01-31 20:49:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [690249152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:49:45,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:49:45,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:49:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350049343] [2022-01-31 20:49:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:49:45,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:49:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:49:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:49:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:49:45,851 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:08,435 INFO L93 Difference]: Finished difference Result 7416 states and 8478 transitions. [2022-01-31 20:50:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 20:50:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 98 [2022-01-31 20:50:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:08,442 INFO L225 Difference]: With dead ends: 7416 [2022-01-31 20:50:08,442 INFO L226 Difference]: Without dead ends: 7272 [2022-01-31 20:50:08,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:50:08,444 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 435 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:08,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 222 Invalid, 2543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:50:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2022-01-31 20:50:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 2318. [2022-01-31 20:50:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:50:14,904 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 98 [2022-01-31 20:50:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:14,904 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:50:14,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:50:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 20:50:14,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:14,907 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:50:14,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 20:50:14,907 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash -540000162, now seen corresponding path program 45 times [2022-01-31 20:50:14,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:14,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375892842] [2022-01-31 20:50:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:14,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:14,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:14,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:14,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:15,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:50:15,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375892842] [2022-01-31 20:50:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [375892842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:15,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:50:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411971658] [2022-01-31 20:50:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:15,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:50:15,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:50:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-31 20:50:15,054 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 20:50:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:50:30,332 INFO L93 Difference]: Finished difference Result 5213 states and 5933 transitions. [2022-01-31 20:50:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:50:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 99 [2022-01-31 20:50:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:50:30,337 INFO L225 Difference]: With dead ends: 5213 [2022-01-31 20:50:30,337 INFO L226 Difference]: Without dead ends: 4989 [2022-01-31 20:50:30,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-01-31 20:50:30,337 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 462 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:50:30,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 143 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 20:50:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2022-01-31 20:50:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 2318. [2022-01-31 20:50:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:50:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:50:36,749 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 99 [2022-01-31 20:50:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:50:36,749 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:50:36,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 20:50:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:50:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 20:50:36,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:50:36,762 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 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 20:50:36,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 20:50:36,763 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:50:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:50:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash -218311863, now seen corresponding path program 46 times [2022-01-31 20:50:36,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:50:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995975414] [2022-01-31 20:50:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:50:36,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:50:36,766 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:50:36,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:50:36,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:50:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:50:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:50:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:50:37,066 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:50:37,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995975414] [2022-01-31 20:50:37,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995975414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:50:37,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:50:37,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 20:50:37,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430881327] [2022-01-31 20:50:37,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:50:37,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 20:50:37,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:50:37,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 20:50:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-01-31 20:50:37,067 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:11,302 INFO L93 Difference]: Finished difference Result 10454 states and 12013 transitions. [2022-01-31 20:51:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 20:51:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 20:51:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:11,313 INFO L225 Difference]: With dead ends: 10454 [2022-01-31 20:51:11,313 INFO L226 Difference]: Without dead ends: 10387 [2022-01-31 20:51:11,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:51:11,314 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 527 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5142 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 5175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:11,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 338 Invalid, 5175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5142 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:51:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10387 states. [2022-01-31 20:51:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10387 to 2318. [2022-01-31 20:51:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:51:17,784 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 99 [2022-01-31 20:51:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:17,784 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:51:17,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:51:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 20:51:17,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:17,787 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:17,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 20:51:17,787 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 47 times [2022-01-31 20:51:17,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:17,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978463851] [2022-01-31 20:51:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:17,789 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:17,789 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:17,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:17,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:51:18,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978463851] [2022-01-31 20:51:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1978463851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:18,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:51:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652324133] [2022-01-31 20:51:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:18,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:51:18,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:51:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:51:18,025 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:51:44,556 INFO L93 Difference]: Finished difference Result 8221 states and 9405 transitions. [2022-01-31 20:51:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 20:51:44,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 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 100 [2022-01-31 20:51:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:51:44,565 INFO L225 Difference]: With dead ends: 8221 [2022-01-31 20:51:44,565 INFO L226 Difference]: Without dead ends: 8077 [2022-01-31 20:51:44,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 20:51:44,566 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 440 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:51:44,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 258 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3389 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:51:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8077 states. [2022-01-31 20:51:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8077 to 2318. [2022-01-31 20:51:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2313 states have (on average 1.1184608733246866) internal successors, (2587), 2313 states have internal predecessors, (2587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2591 transitions. [2022-01-31 20:51:51,386 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2591 transitions. Word has length 100 [2022-01-31 20:51:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:51:51,387 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 2591 transitions. [2022-01-31 20:51:51,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:51:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2591 transitions. [2022-01-31 20:51:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 20:51:51,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:51:51,389 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:51:51,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 20:51:51,390 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:51:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:51:51,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1656582534, now seen corresponding path program 12 times [2022-01-31 20:51:51,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:51:51,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447153802] [2022-01-31 20:51:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:51:51,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:51:51,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:51:51,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:51:51,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:51:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:51,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:51:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:51:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:51:51,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:51:51,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447153802] [2022-01-31 20:51:51,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1447153802] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:51:51,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:51:51,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 20:51:51,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446033262] [2022-01-31 20:51:51,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:51:51,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 20:51:51,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:51:51,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 20:51:51,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:51:51,706 INFO L87 Difference]: Start difference. First operand 2318 states and 2591 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:52:38,530 INFO L93 Difference]: Finished difference Result 13752 states and 15859 transitions. [2022-01-31 20:52:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 20:52:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 100 [2022-01-31 20:52:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:52:38,546 INFO L225 Difference]: With dead ends: 13752 [2022-01-31 20:52:38,546 INFO L226 Difference]: Without dead ends: 13685 [2022-01-31 20:52:38,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=2024, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:52:38,549 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 642 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8711 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 8742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:52:38,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 458 Invalid, 8742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 8711 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:52:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13685 states. [2022-01-31 20:52:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13685 to 2320. [2022-01-31 20:52:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2315 states have (on average 1.118790496760259) internal successors, (2590), 2315 states have internal predecessors, (2590), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2594 transitions. [2022-01-31 20:52:45,469 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2594 transitions. Word has length 100 [2022-01-31 20:52:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:52:45,469 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2594 transitions. [2022-01-31 20:52:45,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:52:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2594 transitions. [2022-01-31 20:52:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 20:52:45,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:52:45,471 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:52:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 20:52:45,472 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:52:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:52:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1862729187, now seen corresponding path program 48 times [2022-01-31 20:52:45,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:52:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044643423] [2022-01-31 20:52:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:52:45,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:52:45,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:52:45,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:52:45,474 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:52:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:52:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:52:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:52:45,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:52:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044643423] [2022-01-31 20:52:45,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044643423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:52:45,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:52:45,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:52:45,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667147739] [2022-01-31 20:52:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:52:45,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:52:45,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:52:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:52:45,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:52:45,670 INFO L87 Difference]: Start difference. First operand 2320 states and 2594 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 20:53:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:04,868 INFO L93 Difference]: Finished difference Result 6020 states and 6863 transitions. [2022-01-31 20:53:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:53:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 101 [2022-01-31 20:53:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:04,874 INFO L225 Difference]: With dead ends: 6020 [2022-01-31 20:53:04,874 INFO L226 Difference]: Without dead ends: 5796 [2022-01-31 20:53:04,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 20:53:04,875 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 578 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:04,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 157 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 20:53:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5796 states. [2022-01-31 20:53:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5796 to 2320. [2022-01-31 20:53:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2315 states have (on average 1.118790496760259) internal successors, (2590), 2315 states have internal predecessors, (2590), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2594 transitions. [2022-01-31 20:53:11,745 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2594 transitions. Word has length 101 [2022-01-31 20:53:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:11,745 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2594 transitions. [2022-01-31 20:53:11,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 20:53:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2594 transitions. [2022-01-31 20:53:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 20:53:11,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:11,748 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 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 20:53:11,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 20:53:11,748 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:11,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2110549810, now seen corresponding path program 49 times [2022-01-31 20:53:11,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942950047] [2022-01-31 20:53:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:11,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:11,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:11,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:11,750 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:12,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:53:12,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:12,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942950047] [2022-01-31 20:53:12,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [942950047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:12,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:12,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 20:53:12,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422477207] [2022-01-31 20:53:12,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:12,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 20:53:12,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 20:53:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2022-01-31 20:53:12,041 INFO L87 Difference]: Start difference. First operand 2320 states and 2594 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 20:53:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:53:52,301 INFO L93 Difference]: Finished difference Result 11261 states and 12943 transitions. [2022-01-31 20:53:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 20:53:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 101 [2022-01-31 20:53:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:53:52,313 INFO L225 Difference]: With dead ends: 11261 [2022-01-31 20:53:52,313 INFO L226 Difference]: Without dead ends: 11194 [2022-01-31 20:53:52,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:53:52,317 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 537 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6491 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 6525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:53:52,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 372 Invalid, 6525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6491 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 20:53:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11194 states. [2022-01-31 20:53:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11194 to 2320. [2022-01-31 20:53:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2315 states have (on average 1.118790496760259) internal successors, (2590), 2315 states have internal predecessors, (2590), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:53:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2594 transitions. [2022-01-31 20:53:59,199 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2594 transitions. Word has length 101 [2022-01-31 20:53:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:53:59,199 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2594 transitions. [2022-01-31 20:53:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 20:53:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2594 transitions. [2022-01-31 20:53:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:53:59,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:53:59,201 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:53:59,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 20:53:59,202 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:53:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:53:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2101733253, now seen corresponding path program 50 times [2022-01-31 20:53:59,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:53:59,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320415094] [2022-01-31 20:53:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:53:59,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:53:59,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:53:59,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:53:59,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:53:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:53:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:53:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:53:59,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:53:59,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320415094] [2022-01-31 20:53:59,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320415094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:53:59,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:53:59,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 20:53:59,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548354842] [2022-01-31 20:53:59,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:53:59,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 20:53:59,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:53:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 20:53:59,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:53:59,370 INFO L87 Difference]: Start difference. First operand 2320 states and 2594 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:04,524 INFO L93 Difference]: Finished difference Result 2692 states and 3001 transitions. [2022-01-31 20:54:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 20:54:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 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 102 [2022-01-31 20:54:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:04,531 INFO L225 Difference]: With dead ends: 2692 [2022-01-31 20:54:04,531 INFO L226 Difference]: Without dead ends: 1611 [2022-01-31 20:54:04,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:54:04,532 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 139 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:04,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 65 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:54:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-31 20:54:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1565. [2022-01-31 20:54:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1560 states have (on average 1.1243589743589744) internal successors, (1754), 1560 states have internal predecessors, (1754), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1758 transitions. [2022-01-31 20:54:09,226 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1758 transitions. Word has length 102 [2022-01-31 20:54:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:09,227 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1758 transitions. [2022-01-31 20:54:09,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1758 transitions. [2022-01-31 20:54:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:54:09,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:09,228 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:09,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 20:54:09,228 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1879577390, now seen corresponding path program 51 times [2022-01-31 20:54:09,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:09,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444897135] [2022-01-31 20:54:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:09,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:09,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:09,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:09,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:09,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444897135] [2022-01-31 20:54:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444897135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:09,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:09,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 20:54:09,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590805588] [2022-01-31 20:54:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:09,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 20:54:09,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:09,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 20:54:09,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:54:09,483 INFO L87 Difference]: Start difference. First operand 1565 states and 1758 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:54:38,993 INFO L93 Difference]: Finished difference Result 8247 states and 9467 transitions. [2022-01-31 20:54:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 20:54:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 102 [2022-01-31 20:54:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:54:39,001 INFO L225 Difference]: With dead ends: 8247 [2022-01-31 20:54:39,001 INFO L226 Difference]: Without dead ends: 8103 [2022-01-31 20:54:39,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:54:39,002 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 482 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4025 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:54:39,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 282 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4025 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 20:54:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2022-01-31 20:54:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 1565. [2022-01-31 20:54:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1560 states have (on average 1.1243589743589744) internal successors, (1754), 1560 states have internal predecessors, (1754), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1758 transitions. [2022-01-31 20:54:43,919 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1758 transitions. Word has length 102 [2022-01-31 20:54:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:54:43,919 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1758 transitions. [2022-01-31 20:54:43,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:54:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1758 transitions. [2022-01-31 20:54:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 20:54:43,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:54:43,921 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:54:43,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 20:54:43,921 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:54:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:54:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1168218975, now seen corresponding path program 13 times [2022-01-31 20:54:43,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:54:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007540358] [2022-01-31 20:54:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:54:43,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:54:43,922 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 20:54:43,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:54:43,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:54:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:44,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:54:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:54:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:54:44,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:54:44,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007540358] [2022-01-31 20:54:44,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007540358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:54:44,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:54:44,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 20:54:44,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189065925] [2022-01-31 20:54:44,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:54:44,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 20:54:44,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:54:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 20:54:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2022-01-31 20:54:44,284 INFO L87 Difference]: Start difference. First operand 1565 states and 1758 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:55:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:55:36,287 INFO L93 Difference]: Finished difference Result 13778 states and 15921 transitions. [2022-01-31 20:55:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 20:55:36,287 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 102 [2022-01-31 20:55:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:55:36,301 INFO L225 Difference]: With dead ends: 13778 [2022-01-31 20:55:36,302 INFO L226 Difference]: Without dead ends: 13711 [2022-01-31 20:55:36,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:55:36,303 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 683 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9628 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 9661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 9628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:55:36,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 482 Invalid, 9661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 9628 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:55:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states.