/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/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:11:39,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:11:39,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:11:39,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:11:39,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 01:11:39,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 01:11:39,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 01:11:39,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 01:11:39,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 01:11:39,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 01:11:39,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 01:11:39,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 01:11:39,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 01:11:39,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 01:11:39,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 01:11:39,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 01:11:39,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 01:11:39,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:11:39,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:11:39,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:11:39,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:11:39,633 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:11:39,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:11:39,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:11:39,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:11:39,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:11:39,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:11:39,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:11:39,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:11:39,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:11:39,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:11:39,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:11:39,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:39,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:11:39,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:11:39,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:11:39,637 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:11:39,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:11:39,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:11:39,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:11:39,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:11:39,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:11:39,831 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:11:39,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2022-02-15 01:11:39,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8c4cb47/8969031742e74c9fb1a807840e291bad/FLAG3c804f2cd [2022-02-15 01:11:40,186 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:11:40,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2022-02-15 01:11:40,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8c4cb47/8969031742e74c9fb1a807840e291bad/FLAG3c804f2cd [2022-02-15 01:11:40,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e8c4cb47/8969031742e74c9fb1a807840e291bad [2022-02-15 01:11:40,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:11:40,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:11:40,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:40,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:11:40,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:11:40,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3ba89c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40, skipping insertion in model container [2022-02-15 01:11:40,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:11:40,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:11:40,755 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/eureka_01-1.c[446,459] [2022-02-15 01:11:40,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:40,822 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:11:40,831 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/eureka_01-1.c[446,459] [2022-02-15 01:11:40,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:40,859 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:11:40,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40 WrapperNode [2022-02-15 01:11:40,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:40,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:11:40,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:11:40,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:11:40,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:11:40,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:11:40,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:11:40,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:11:40,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (1/1) ... [2022-02-15 01:11:40,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:11:40,950 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) [2022-02-15 01:11:40,964 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 [2022-02-15 01:11:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:11:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:11:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:11:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:11:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:11:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:11:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:11:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:11:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:11:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:11:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:11:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:11:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:11:41,028 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:11:41,029 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:11:41,215 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:11:41,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:11:41,219 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-02-15 01:11:41,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:41 BoogieIcfgContainer [2022-02-15 01:11:41,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:11:41,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:11:41,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:11:41,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:11:41,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:11:40" (1/3) ... [2022-02-15 01:11:41,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cabde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:41, skipping insertion in model container [2022-02-15 01:11:41,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:40" (2/3) ... [2022-02-15 01:11:41,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cabde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:41, skipping insertion in model container [2022-02-15 01:11:41,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:41" (3/3) ... [2022-02-15 01:11:41,226 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2022-02-15 01:11:41,229 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:11:41,229 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:11:41,257 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:11:41,261 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 [2022-02-15 01:11:41,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:11:41,272 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) [2022-02-15 01:11:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:11:41,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:41,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:41,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2022-02-15 01:11:41,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:41,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041326617] [2022-02-15 01:11:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:41,328 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:41,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:41,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041326617] [2022-02-15 01:11:41,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1041326617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:41,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:41,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:11:41,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278894204] [2022-02-15 01:11:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:41,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:11:41,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:41,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:11:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:11:41,475 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:41,537 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-02-15 01:11:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:11:41,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:11:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:41,550 INFO L225 Difference]: With dead ends: 63 [2022-02-15 01:11:41,551 INFO L226 Difference]: Without dead ends: 32 [2022-02-15 01:11:41,553 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 [2022-02-15 01:11:41,555 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:41,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-15 01:11:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-15 01:11:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-02-15 01:11:41,597 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-02-15 01:11:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:41,598 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-02-15 01:11:41,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-02-15 01:11:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:11:41,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:41,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:41,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:11:41,602 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:41,603 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2022-02-15 01:11:41,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:41,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814947410] [2022-02-15 01:11:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:41,612 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:41,784 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:41,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814947410] [2022-02-15 01:11:41,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814947410] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:41,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:41,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:41,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952801834] [2022-02-15 01:11:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:41,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:41,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:41,792 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:41,964 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-02-15 01:11:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:11:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:11:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:41,967 INFO L225 Difference]: With dead ends: 80 [2022-02-15 01:11:41,967 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:11:41,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:41,972 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:41,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 36 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:11:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-02-15 01:11:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-15 01:11:41,984 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2022-02-15 01:11:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:41,985 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-15 01:11:41,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-15 01:11:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:41,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:41,986 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, 1, 1, 1] [2022-02-15 01:11:41,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:11:41,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2022-02-15 01:11:41,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:41,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126165315] [2022-02-15 01:11:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:42,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:42,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:42,010 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:42,154 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:42,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126165315] [2022-02-15 01:11:42,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [126165315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:42,154 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:42,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:42,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483964943] [2022-02-15 01:11:42,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:42,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:42,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:42,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:42,156 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:42,397 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-02-15 01:11:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:42,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 01:11:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:42,399 INFO L225 Difference]: With dead ends: 78 [2022-02-15 01:11:42,399 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 01:11:42,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:42,404 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:42,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 01:11:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-02-15 01:11:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-02-15 01:11:42,412 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2022-02-15 01:11:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:42,413 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-02-15 01:11:42,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-02-15 01:11:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:42,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:42,413 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, 1, 1, 1] [2022-02-15 01:11:42,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:11:42,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:42,414 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2022-02-15 01:11:42,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:42,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475411382] [2022-02-15 01:11:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:42,415 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:42,415 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:42,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:42,416 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:42,446 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:42,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475411382] [2022-02-15 01:11:42,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1475411382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:42,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:42,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:11:42,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880187796] [2022-02-15 01:11:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:42,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:11:42,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:11:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:11:42,447 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:42,488 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-02-15 01:11:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:11:42,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 01:11:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:42,490 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:11:42,490 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 01:11:42,491 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 [2022-02-15 01:11:42,491 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:42,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 01:11:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-02-15 01:11:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-02-15 01:11:42,499 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2022-02-15 01:11:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:42,499 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-02-15 01:11:42,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-02-15 01:11:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:11:42,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:42,500 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, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:42,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:11:42,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2022-02-15 01:11:42,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:42,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491165872] [2022-02-15 01:11:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:42,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:42,502 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:42,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:42,503 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:42,555 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:42,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491165872] [2022-02-15 01:11:42,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [491165872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:42,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:42,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:11:42,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727328967] [2022-02-15 01:11:42,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:42,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:11:42,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:11:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:42,557 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2022-02-15 01:11:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:42,675 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2022-02-15 01:11:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:11:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 [2022-02-15 01:11:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:42,676 INFO L225 Difference]: With dead ends: 130 [2022-02-15 01:11:42,676 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 01:11:42,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:42,677 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 59 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 01:11:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2022-02-15 01:11:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-02-15 01:11:42,687 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2022-02-15 01:11:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-02-15 01:11:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2022-02-15 01:11:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-02-15 01:11:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:11:42,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:42,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:42,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:11:42,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2022-02-15 01:11:42,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:42,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907446155] [2022-02-15 01:11:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:42,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:42,698 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:42,699 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:42,750 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:42,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907446155] [2022-02-15 01:11:42,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [907446155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:42,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:42,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:42,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209217620] [2022-02-15 01:11:42,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:42,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:42,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:42,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:42,751 INFO L87 Difference]: Start difference. First operand 68 states and 84 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) [2022-02-15 01:11:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:42,980 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2022-02-15 01:11:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:42,981 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 [2022-02-15 01:11:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:42,982 INFO L225 Difference]: With dead ends: 178 [2022-02-15 01:11:42,982 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 01:11:42,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:42,983 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:42,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 73 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 01:11:42,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2022-02-15 01:11:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-02-15 01:11:42,995 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2022-02-15 01:11:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:42,996 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-02-15 01:11:42,996 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) [2022-02-15 01:11:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-02-15 01:11:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:11:42,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:42,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:42,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:11:42,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2022-02-15 01:11:42,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:42,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183458892] [2022-02-15 01:11:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:42,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:42,998 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:42,999 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:43,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:43,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:43,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183458892] [2022-02-15 01:11:43,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183458892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:43,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:43,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:11:43,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108802744] [2022-02-15 01:11:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:43,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:11:43,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:11:43,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:43,345 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2022-02-15 01:11:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:43,894 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2022-02-15 01:11:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:11:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 31 [2022-02-15 01:11:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:43,897 INFO L225 Difference]: With dead ends: 177 [2022-02-15 01:11:43,897 INFO L226 Difference]: Without dead ends: 175 [2022-02-15 01:11:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:11:43,898 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 220 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:43,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 51 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-15 01:11:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2022-02-15 01:11:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-02-15 01:11:43,918 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2022-02-15 01:11:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:43,918 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-02-15 01:11:43,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2022-02-15 01:11:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-02-15 01:11:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:11:43,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:43,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:43,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:11:43,920 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 2 times [2022-02-15 01:11:43,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:43,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401011345] [2022-02-15 01:11:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:43,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:43,922 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:43,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:43,924 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:44,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:44,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401011345] [2022-02-15 01:11:44,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [401011345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:44,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:44,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:11:44,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858768018] [2022-02-15 01:11:44,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:44,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:11:44,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:11:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:44,033 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2022-02-15 01:11:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:44,354 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2022-02-15 01:11:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:11:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 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 31 [2022-02-15 01:11:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:44,356 INFO L225 Difference]: With dead ends: 218 [2022-02-15 01:11:44,356 INFO L226 Difference]: Without dead ends: 216 [2022-02-15 01:11:44,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:11:44,357 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:44,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 58 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-15 01:11:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2022-02-15 01:11:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-02-15 01:11:44,386 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2022-02-15 01:11:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:44,386 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-02-15 01:11:44,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2022-02-15 01:11:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-02-15 01:11:44,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:44,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:44,388 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 01:11:44,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:11:44,388 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2022-02-15 01:11:44,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:44,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640563971] [2022-02-15 01:11:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:44,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:44,390 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:44,391 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:11:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:44,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:44,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640563971] [2022-02-15 01:11:44,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640563971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:44,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:44,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:44,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768346419] [2022-02-15 01:11:44,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:44,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:44,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:44,443 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:44,662 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2022-02-15 01:11:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-15 01:11:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:44,663 INFO L225 Difference]: With dead ends: 254 [2022-02-15 01:11:44,663 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 01:11:44,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:44,664 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:44,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 53 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 01:11:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2022-02-15 01:11:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-02-15 01:11:44,684 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2022-02-15 01:11:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:44,684 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-02-15 01:11:44,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-02-15 01:11:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:11:44,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:44,685 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 01:11:44,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:11:44,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 2 times [2022-02-15 01:11:44,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:44,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650351776] [2022-02-15 01:11:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:44,687 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:44,687 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:44,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:44,688 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:44,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:44,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650351776] [2022-02-15 01:11:44,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650351776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:44,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:44,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:44,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773247019] [2022-02-15 01:11:44,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:44,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:44,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:44,764 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2022-02-15 01:11:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:44,975 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-02-15 01:11:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:11:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 34 [2022-02-15 01:11:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:44,976 INFO L225 Difference]: With dead ends: 240 [2022-02-15 01:11:44,976 INFO L226 Difference]: Without dead ends: 219 [2022-02-15 01:11:44,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:44,977 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:44,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 68 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-15 01:11:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2022-02-15 01:11:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-02-15 01:11:45,005 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2022-02-15 01:11:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:45,006 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-02-15 01:11:45,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2022-02-15 01:11:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-02-15 01:11:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:11:45,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:45,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:45,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:11:45,007 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 3 times [2022-02-15 01:11:45,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:45,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29729642] [2022-02-15 01:11:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:45,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:45,010 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:45,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:45,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29729642] [2022-02-15 01:11:45,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [29729642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:45,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:45,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:11:45,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288643142] [2022-02-15 01:11:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:11:45,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:11:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:45,059 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2022-02-15 01:11:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:45,150 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2022-02-15 01:11:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:11:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 34 [2022-02-15 01:11:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:45,151 INFO L225 Difference]: With dead ends: 248 [2022-02-15 01:11:45,151 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 01:11:45,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:45,152 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:45,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 42 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 01:11:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2022-02-15 01:11:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.297709923664122) internal successors, (170), 133 states have internal predecessors, (170), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2022-02-15 01:11:45,171 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 34 [2022-02-15 01:11:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:45,171 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2022-02-15 01:11:45,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2022-02-15 01:11:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2022-02-15 01:11:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:11:45,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:45,172 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:45,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:11:45,172 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:45,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 4 times [2022-02-15 01:11:45,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:45,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347314455] [2022-02-15 01:11:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:45,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,174 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:45,175 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:45,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:45,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347314455] [2022-02-15 01:11:45,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347314455] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:45,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:45,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:11:45,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726169498] [2022-02-15 01:11:45,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:45,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:11:45,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:45,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:11:45,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:45,247 INFO L87 Difference]: Start difference. First operand 140 states and 178 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) [2022-02-15 01:11:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:45,730 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2022-02-15 01:11:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:11:45,730 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 34 [2022-02-15 01:11:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:45,731 INFO L225 Difference]: With dead ends: 346 [2022-02-15 01:11:45,732 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 01:11:45,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:11:45,732 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:45,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 93 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 01:11:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 173. [2022-02-15 01:11:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 166 states have internal predecessors, (214), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2022-02-15 01:11:45,768 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 34 [2022-02-15 01:11:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:45,768 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2022-02-15 01:11:45,769 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) [2022-02-15 01:11:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2022-02-15 01:11:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:11:45,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:45,769 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 01:11:45,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:11:45,769 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 3 times [2022-02-15 01:11:45,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:45,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331587142] [2022-02-15 01:11:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:45,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:45,771 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:45,772 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331587142] [2022-02-15 01:11:46,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [331587142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:11:46,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128093721] [2022-02-15 01:11:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:11:46,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:11:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:11:46,264 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2022-02-15 01:11:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:46,698 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2022-02-15 01:11:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:11:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 37 [2022-02-15 01:11:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:46,699 INFO L225 Difference]: With dead ends: 200 [2022-02-15 01:11:46,699 INFO L226 Difference]: Without dead ends: 181 [2022-02-15 01:11:46,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:11:46,700 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 86 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:46,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 71 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-02-15 01:11:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2022-02-15 01:11:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 169 states have internal predecessors, (218), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2022-02-15 01:11:46,729 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 37 [2022-02-15 01:11:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:46,729 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2022-02-15 01:11:46,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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) [2022-02-15 01:11:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2022-02-15 01:11:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:11:46,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:11:46,730 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2022-02-15 01:11:46,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385229560] [2022-02-15 01:11:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:46,732 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,733 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,767 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385229560] [2022-02-15 01:11:46,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385229560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,767 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:46,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415259816] [2022-02-15 01:11:46,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:46,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:46,768 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-02-15 01:11:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:46,856 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2022-02-15 01:11:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:11:46,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 37 [2022-02-15 01:11:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:46,857 INFO L225 Difference]: With dead ends: 280 [2022-02-15 01:11:46,857 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:11:46,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:46,858 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:46,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:11:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2022-02-15 01:11:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 171 states have internal predecessors, (217), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2022-02-15 01:11:46,886 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 37 [2022-02-15 01:11:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:46,886 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2022-02-15 01:11:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2022-02-15 01:11:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2022-02-15 01:11:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:11:46,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:11:46,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 5 times [2022-02-15 01:11:46,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981472958] [2022-02-15 01:11:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:46,889 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,890 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,004 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981472958] [2022-02-15 01:11:47,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [981472958] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,004 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:11:47,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024895975] [2022-02-15 01:11:47,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:11:47,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:11:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:47,005 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2022-02-15 01:11:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,312 INFO L93 Difference]: Finished difference Result 267 states and 340 transitions. [2022-02-15 01:11:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 01:11:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,313 INFO L225 Difference]: With dead ends: 267 [2022-02-15 01:11:47,314 INFO L226 Difference]: Without dead ends: 265 [2022-02-15 01:11:47,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:11:47,314 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 62 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-15 01:11:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 162. [2022-02-15 01:11:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 155 states have internal predecessors, (196), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-02-15 01:11:47,352 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 37 [2022-02-15 01:11:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,353 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-02-15 01:11:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 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) [2022-02-15 01:11:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-02-15 01:11:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:11:47,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,353 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 01:11:47,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:11:47,353 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2022-02-15 01:11:47,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307475334] [2022-02-15 01:11:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,356 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:11:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307475334] [2022-02-15 01:11:47,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307475334] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:11:47,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249636409] [2022-02-15 01:11:47,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:11:47,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:11:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:11:47,470 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,885 INFO L93 Difference]: Finished difference Result 312 states and 399 transitions. [2022-02-15 01:11:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:11:47,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-02-15 01:11:47,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,886 INFO L225 Difference]: With dead ends: 312 [2022-02-15 01:11:47,886 INFO L226 Difference]: Without dead ends: 310 [2022-02-15 01:11:47,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:11:47,887 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 224 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 67 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-15 01:11:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 231. [2022-02-15 01:11:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 222 states have internal predecessors, (281), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 293 transitions. [2022-02-15 01:11:47,953 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 293 transitions. Word has length 39 [2022-02-15 01:11:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,953 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 293 transitions. [2022-02-15 01:11:47,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 293 transitions. [2022-02-15 01:11:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:11:47,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2022-02-15 01:11:47,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:11:47,955 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 4 times [2022-02-15 01:11:47,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083877187] [2022-02-15 01:11:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,956 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,957 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083877187] [2022-02-15 01:11:48,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083877187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:11:48,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254517523] [2022-02-15 01:11:48,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:11:48,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:11:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:48,014 INFO L87 Difference]: Start difference. First operand 231 states and 293 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2022-02-15 01:11:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,463 INFO L93 Difference]: Finished difference Result 498 states and 642 transitions. [2022-02-15 01:11:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:11:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 40 [2022-02-15 01:11:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,465 INFO L225 Difference]: With dead ends: 498 [2022-02-15 01:11:48,465 INFO L226 Difference]: Without dead ends: 466 [2022-02-15 01:11:48,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:11:48,466 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 134 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-02-15 01:11:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 315. [2022-02-15 01:11:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 303 states have (on average 1.3135313531353134) internal successors, (398), 306 states have internal predecessors, (398), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2022-02-15 01:11:48,538 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 40 [2022-02-15 01:11:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,539 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2022-02-15 01:11:48,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2022-02-15 01:11:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2022-02-15 01:11:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:11:48,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,540 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-15 01:11:48,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:11:48,540 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 2 times [2022-02-15 01:11:48,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436838752] [2022-02-15 01:11:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,542 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,542 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436838752] [2022-02-15 01:11:49,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [436838752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:11:49,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549135634] [2022-02-15 01:11:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:11:49,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:11:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:49,043 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,873 INFO L93 Difference]: Finished difference Result 734 states and 962 transitions. [2022-02-15 01:11:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:11:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:11:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,876 INFO L225 Difference]: With dead ends: 734 [2022-02-15 01:11:49,876 INFO L226 Difference]: Without dead ends: 732 [2022-02-15 01:11:49,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:11:49,877 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 207 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 53 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-15 01:11:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 490. [2022-02-15 01:11:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 478 states have (on average 1.3577405857740585) internal successors, (649), 481 states have internal predecessors, (649), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 661 transitions. [2022-02-15 01:11:49,990 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 661 transitions. Word has length 40 [2022-02-15 01:11:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,990 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 661 transitions. [2022-02-15 01:11:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 661 transitions. [2022-02-15 01:11:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:11:49,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-02-15 01:11:49,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:11:49,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1909650267, now seen corresponding path program 5 times [2022-02-15 01:11:49,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299622977] [2022-02-15 01:11:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,993 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,994 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:50,774 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:50,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299622977] [2022-02-15 01:11:50,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299622977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:50,774 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:50,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:11:50,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551293359] [2022-02-15 01:11:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:50,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:11:50,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:11:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:11:50,775 INFO L87 Difference]: Start difference. First operand 490 states and 661 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 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) [2022-02-15 01:11:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:51,528 INFO L93 Difference]: Finished difference Result 520 states and 694 transitions. [2022-02-15 01:11:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:11:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 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 43 [2022-02-15 01:11:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:51,531 INFO L225 Difference]: With dead ends: 520 [2022-02-15 01:11:51,531 INFO L226 Difference]: Without dead ends: 498 [2022-02-15 01:11:51,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:11:51,532 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 122 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:51,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 81 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-15 01:11:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 493. [2022-02-15 01:11:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 481 states have (on average 1.3575883575883576) internal successors, (653), 484 states have internal predecessors, (653), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 665 transitions. [2022-02-15 01:11:51,650 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 665 transitions. Word has length 43 [2022-02-15 01:11:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:51,650 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 665 transitions. [2022-02-15 01:11:51,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 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) [2022-02-15 01:11:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 665 transitions. [2022-02-15 01:11:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 01:11:51,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:51,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-02-15 01:11:51,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:11:51,651 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash -383539670, now seen corresponding path program 2 times [2022-02-15 01:11:51,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:51,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537871433] [2022-02-15 01:11:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:51,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:51,653 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:51,654 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-15 01:11:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:51,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:51,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537871433] [2022-02-15 01:11:51,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537871433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:51,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:51,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:11:51,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824034050] [2022-02-15 01:11:51,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:51,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:11:51,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:11:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:51,712 INFO L87 Difference]: Start difference. First operand 493 states and 665 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:52,139 INFO L93 Difference]: Finished difference Result 844 states and 1125 transitions. [2022-02-15 01:11:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:52,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-02-15 01:11:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:52,141 INFO L225 Difference]: With dead ends: 844 [2022-02-15 01:11:52,141 INFO L226 Difference]: Without dead ends: 535 [2022-02-15 01:11:52,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:11:52,142 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:52,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 63 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-15 01:11:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 407. [2022-02-15 01:11:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 395 states have (on average 1.3341772151898734) internal successors, (527), 398 states have internal predecessors, (527), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 539 transitions. [2022-02-15 01:11:52,268 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 539 transitions. Word has length 45 [2022-02-15 01:11:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:52,268 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 539 transitions. [2022-02-15 01:11:52,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 539 transitions. [2022-02-15 01:11:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:11:52,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:52,269 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2022-02-15 01:11:52,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:11:52,269 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:52,270 INFO L85 PathProgramCache]: Analyzing trace with hash 651363238, now seen corresponding path program 3 times [2022-02-15 01:11:52,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:52,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085272045] [2022-02-15 01:11:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:52,271 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:52,271 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:52,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:52,272 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-15 01:11:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 01:11:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:52,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:52,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085272045] [2022-02-15 01:11:52,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1085272045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:52,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:52,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:11:52,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732920920] [2022-02-15 01:11:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:52,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:11:52,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:11:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:52,340 INFO L87 Difference]: Start difference. First operand 407 states and 539 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:52,828 INFO L93 Difference]: Finished difference Result 775 states and 1004 transitions. [2022-02-15 01:11:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:11:52,829 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-02-15 01:11:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:52,831 INFO L225 Difference]: With dead ends: 775 [2022-02-15 01:11:52,831 INFO L226 Difference]: Without dead ends: 595 [2022-02-15 01:11:52,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:11:52,832 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:52,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 62 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-15 01:11:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 440. [2022-02-15 01:11:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 426 states have (on average 1.307511737089202) internal successors, (557), 430 states have internal predecessors, (557), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:11:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2022-02-15 01:11:52,956 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 47 [2022-02-15 01:11:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:52,957 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2022-02-15 01:11:52,957 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2022-02-15 01:11:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:11:52,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:52,958 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2022-02-15 01:11:52,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:11:52,958 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1904691350, now seen corresponding path program 6 times [2022-02-15 01:11:52,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:52,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142815689] [2022-02-15 01:11:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:52,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:52,959 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:52,960 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:53,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:53,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142815689] [2022-02-15 01:11:53,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [142815689] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:53,044 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:53,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:11:53,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604477308] [2022-02-15 01:11:53,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:53,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:11:53,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:53,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:11:53,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:11:53,045 INFO L87 Difference]: Start difference. First operand 440 states and 573 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:53,911 INFO L93 Difference]: Finished difference Result 1037 states and 1338 transitions. [2022-02-15 01:11:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:11:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 01:11:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:53,931 INFO L225 Difference]: With dead ends: 1037 [2022-02-15 01:11:53,931 INFO L226 Difference]: Without dead ends: 997 [2022-02-15 01:11:53,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:11:53,933 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 160 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:53,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 95 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-02-15 01:11:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 597. [2022-02-15 01:11:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 583 states have (on average 1.3379073756432247) internal successors, (780), 587 states have internal predecessors, (780), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:11:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2022-02-15 01:11:54,152 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 46 [2022-02-15 01:11:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:54,153 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2022-02-15 01:11:54,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2022-02-15 01:11:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:11:54,162 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:54,162 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-02-15 01:11:54,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:11:54,162 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1776596685, now seen corresponding path program 3 times [2022-02-15 01:11:54,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:54,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40845776] [2022-02-15 01:11:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:54,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:54,166 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:54,167 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:54,279 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:54,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40845776] [2022-02-15 01:11:54,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [40845776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:54,279 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:54,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:54,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723233974] [2022-02-15 01:11:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:54,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:54,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:54,280 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2022-02-15 01:11:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:54,745 INFO L93 Difference]: Finished difference Result 1132 states and 1484 transitions. [2022-02-15 01:11:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 46 [2022-02-15 01:11:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:54,748 INFO L225 Difference]: With dead ends: 1132 [2022-02-15 01:11:54,748 INFO L226 Difference]: Without dead ends: 849 [2022-02-15 01:11:54,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:54,749 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:54,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 61 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-15 01:11:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 687. [2022-02-15 01:11:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 673 states have (on average 1.325408618127786) internal successors, (892), 677 states have internal predecessors, (892), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:11:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 908 transitions. [2022-02-15 01:11:54,936 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 908 transitions. Word has length 46 [2022-02-15 01:11:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:54,936 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 908 transitions. [2022-02-15 01:11:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2022-02-15 01:11:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 908 transitions. [2022-02-15 01:11:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:11:54,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:54,937 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-02-15 01:11:54,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:11:54,938 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash -218065925, now seen corresponding path program 4 times [2022-02-15 01:11:54,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:54,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347648810] [2022-02-15 01:11:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:54,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:54,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:54,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:54,940 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:54,987 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:54,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347648810] [2022-02-15 01:11:54,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347648810] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:54,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:54,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:54,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732823082] [2022-02-15 01:11:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:54,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:54,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:54,989 INFO L87 Difference]: Start difference. First operand 687 states and 908 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2022-02-15 01:11:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:55,372 INFO L93 Difference]: Finished difference Result 883 states and 1130 transitions. [2022-02-15 01:11:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:55,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 46 [2022-02-15 01:11:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:55,377 INFO L225 Difference]: With dead ends: 883 [2022-02-15 01:11:55,378 INFO L226 Difference]: Without dead ends: 680 [2022-02-15 01:11:55,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:55,379 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:55,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-15 01:11:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 620. [2022-02-15 01:11:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 606 states have (on average 1.297029702970297) internal successors, (786), 610 states have internal predecessors, (786), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:11:55,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 802 transitions. [2022-02-15 01:11:55,561 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 802 transitions. Word has length 46 [2022-02-15 01:11:55,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:55,561 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 802 transitions. [2022-02-15 01:11:55,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2022-02-15 01:11:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 802 transitions. [2022-02-15 01:11:55,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:11:55,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:55,562 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:55,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:11:55,562 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash 983274622, now seen corresponding path program 1 times [2022-02-15 01:11:55,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:55,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932165604] [2022-02-15 01:11:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:55,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:55,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:55,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:55,565 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-15 01:11:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:56,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:56,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932165604] [2022-02-15 01:11:56,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932165604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:56,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:56,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:11:56,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678356016] [2022-02-15 01:11:56,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:56,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:11:56,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:11:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:11:56,783 INFO L87 Difference]: Start difference. First operand 620 states and 802 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:58,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:58,610 INFO L93 Difference]: Finished difference Result 1245 states and 1567 transitions. [2022-02-15 01:11:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:11:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-02-15 01:11:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:58,617 INFO L225 Difference]: With dead ends: 1245 [2022-02-15 01:11:58,617 INFO L226 Difference]: Without dead ends: 1086 [2022-02-15 01:11:58,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:11:58,618 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 381 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:58,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 59 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:11:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-02-15 01:11:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 762. [2022-02-15 01:11:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 748 states have (on average 1.3088235294117647) internal successors, (979), 752 states have internal predecessors, (979), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-15 01:11:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 995 transitions. [2022-02-15 01:11:58,894 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 995 transitions. Word has length 48 [2022-02-15 01:11:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:58,894 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 995 transitions. [2022-02-15 01:11:58,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 995 transitions. [2022-02-15 01:11:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:11:58,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:58,896 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:11:58,896 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 849261116, now seen corresponding path program 1 times [2022-02-15 01:11:58,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:58,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553060066] [2022-02-15 01:11:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:58,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:58,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:58,899 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:11:58,943 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 01:11:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:11:58,981 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 01:11:58,981 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 01:11:58,982 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:11:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:11:58,985 INFO L732 BasicCegarLoop]: Path program histogram: [6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:58,987 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 01:11:59,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:11:59 BoogieIcfgContainer [2022-02-15 01:11:59,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 01:11:59,003 INFO L158 Benchmark]: Toolchain (without parser) took 18386.46ms. Allocated memory was 168.8MB in the beginning and 607.1MB in the end (delta: 438.3MB). Free memory was 115.8MB in the beginning and 305.6MB in the end (delta: -189.8MB). Peak memory consumption was 249.2MB. Max. memory is 8.0GB. [2022-02-15 01:11:59,003 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 168.8MB. Free memory was 132.4MB in the beginning and 132.2MB in the end (delta: 122.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:11:59,003 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.23ms. Allocated memory was 168.8MB in the beginning and 239.1MB in the end (delta: 70.3MB). Free memory was 115.6MB in the beginning and 210.1MB in the end (delta: -94.6MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-02-15 01:11:59,003 INFO L158 Benchmark]: Boogie Preprocessor took 64.68ms. Allocated memory is still 239.1MB. Free memory was 210.1MB in the beginning and 208.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-15 01:11:59,003 INFO L158 Benchmark]: RCFGBuilder took 294.84ms. Allocated memory is still 239.1MB. Free memory was 208.0MB in the beginning and 192.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-02-15 01:11:59,004 INFO L158 Benchmark]: TraceAbstraction took 17780.87ms. Allocated memory was 239.1MB in the beginning and 607.1MB in the end (delta: 368.1MB). Free memory was 192.2MB in the beginning and 305.6MB in the end (delta: -113.4MB). Peak memory consumption was 255.1MB. Max. memory is 8.0GB. [2022-02-15 01:11:59,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 168.8MB. Free memory was 132.4MB in the beginning and 132.2MB in the end (delta: 122.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.23ms. Allocated memory was 168.8MB in the beginning and 239.1MB in the end (delta: 70.3MB). Free memory was 115.6MB in the beginning and 210.1MB in the end (delta: -94.6MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 64.68ms. Allocated memory is still 239.1MB. Free memory was 210.1MB in the beginning and 208.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 294.84ms. Allocated memory is still 239.1MB. Free memory was 208.0MB in the beginning and 192.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 17780.87ms. Allocated memory was 239.1MB in the beginning and 607.1MB in the end (delta: 368.1MB). Free memory was 192.2MB in the beginning and 305.6MB in the end (delta: -113.4MB). Peak memory consumption was 255.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 [L30] COND TRUE i < nodecount [L31] COND TRUE i == source [L32] distance[i] = 0 [L30] i++ [L30] COND TRUE i < nodecount [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY [L30] i++ [L30] COND FALSE !(i < nodecount) [L39] i = 0 [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND FALSE !(i < nodecount) [L51] i = 0 [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ [L51] COND FALSE !(i < edgecount) [L61] i = 0 [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND FALSE !(!(cond)) [L63] RET __VERIFIER_assert(distance[i]>=0) [L61] i++ [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.7s, OverallIterations: 26, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3522 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3508 mSDsluCounter, 1562 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 589 mSDsCounter, 1354 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7394 IncrementalHoareTripleChecker+Invalid, 8748 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1354 mSolverCounterUnsat, 973 mSDtfsCounter, 7394 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=762occurred in iteration=25, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 25 MinimizatonAttempts, 2386 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-15 01:11:59,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...