/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/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 20:40:23,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 20:40:23,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 20:40:23,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 20:40:23,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 20:40:23,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 20:40:23,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 20:40:23,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 20:40:23,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 20:40:23,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 20:40:23,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 20:40:23,757 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 20:40:23,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 20:40:23,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 20:40:23,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 20:40:23,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 20:40:23,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 20:40:23,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 20:40:23,758 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 20:40:23,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 20:40:23,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:40:23,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 20:40:23,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 20:40:23,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 20:40:23,760 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 20:40:23,760 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 20:40:23,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 20:40:23,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 20:40:23,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 20:40:23,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 20:40:23,923 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 20:40:23,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2022-01-31 20:40:23,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eaea0c60/2327d04034d54264925882c97248fec4/FLAG4f910edf0 [2022-01-31 20:40:24,303 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 20:40:24,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2022-01-31 20:40:24,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eaea0c60/2327d04034d54264925882c97248fec4/FLAG4f910edf0 [2022-01-31 20:40:24,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eaea0c60/2327d04034d54264925882c97248fec4 [2022-01-31 20:40:24,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 20:40:24,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 20:40:24,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 20:40:24,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 20:40:24,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 20:40:24,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c36b892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24, skipping insertion in model container [2022-01-31 20:40:24,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 20:40:24,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 20:40:24,898 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/sum04-1.i[808,821] [2022-01-31 20:40:24,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:40:24,910 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 20:40:24,917 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/sum04-1.i[808,821] [2022-01-31 20:40:24,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 20:40:24,926 INFO L208 MainTranslator]: Completed translation [2022-01-31 20:40:24,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24 WrapperNode [2022-01-31 20:40:24,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 20:40:24,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 20:40:24,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 20:40:24,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 20:40:24,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 20:40:24,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 20:40:24,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 20:40:24,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 20:40:24,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (1/1) ... [2022-01-31 20:40:24,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 20:40:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 20:40:24,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 20:40:24,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 20:40:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 20:40:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 20:40:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 20:40:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 20:40:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 20:40:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 20:40:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 20:40:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 20:40:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 20:40:25,039 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 20:40:25,041 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 20:40:25,115 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 20:40:25,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 20:40:25,119 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 20:40:25,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:40:25 BoogieIcfgContainer [2022-01-31 20:40:25,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 20:40:25,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 20:40:25,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 20:40:25,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 20:40:25,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:40:24" (1/3) ... [2022-01-31 20:40:25,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236ce476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:40:25, skipping insertion in model container [2022-01-31 20:40:25,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:40:24" (2/3) ... [2022-01-31 20:40:25,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236ce476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:40:25, skipping insertion in model container [2022-01-31 20:40:25,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:40:25" (3/3) ... [2022-01-31 20:40:25,135 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2022-01-31 20:40:25,139 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 20:40:25,139 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 20:40:25,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 20:40:25,191 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 20:40:25,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 20:40:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 20:40:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:40:25,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:25,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:25,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2022-01-31 20:40:25,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:25,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700198992] [2022-01-31 20:40:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:25,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:25,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:25,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:25,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700198992] [2022-01-31 20:40:25,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [700198992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:25,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:25,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 20:40:25,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176886954] [2022-01-31 20:40:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:25,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 20:40:25,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 20:40:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:40:25,435 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:25,498 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 20:40:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 20:40:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 20:40:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:25,504 INFO L225 Difference]: With dead ends: 31 [2022-01-31 20:40:25,504 INFO L226 Difference]: Without dead ends: 14 [2022-01-31 20:40:25,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 20:40:25,508 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:25,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-31 20:40:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-31 20:40:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-31 20:40:25,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-01-31 20:40:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:25,538 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-31 20:40:25,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,539 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-31 20:40:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 20:40:25,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:25,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:25,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 20:40:25,540 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2022-01-31 20:40:25,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306492208] [2022-01-31 20:40:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:25,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:25,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:40:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:25,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:25,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306492208] [2022-01-31 20:40:25,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306492208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:25,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:25,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 20:40:25,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649366639] [2022-01-31 20:40:25,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:25,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 20:40:25,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 20:40:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 20:40:25,616 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:25,664 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-01-31 20:40:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 20:40:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 20:40:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:25,666 INFO L225 Difference]: With dead ends: 25 [2022-01-31 20:40:25,666 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 20:40:25,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 20:40:25,667 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:25,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 20:40:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-01-31 20:40:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-31 20:40:25,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-01-31 20:40:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:25,672 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-31 20:40:25,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-31 20:40:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 20:40:25,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:25,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:25,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 20:40:25,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:25,674 INFO L85 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2022-01-31 20:40:25,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:25,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545283407] [2022-01-31 20:40:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:25,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:25,769 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:25,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:25,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:25,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:25,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545283407] [2022-01-31 20:40:25,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [545283407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:25,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:25,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:40:25,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783699677] [2022-01-31 20:40:25,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:25,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:40:25,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:40:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-31 20:40:25,893 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:25,999 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-01-31 20:40:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:40:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 20:40:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:26,001 INFO L225 Difference]: With dead ends: 26 [2022-01-31 20:40:26,001 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 20:40:26,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:40:26,008 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:26,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 20:40:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-01-31 20:40:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-31 20:40:26,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-01-31 20:40:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:26,021 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-31 20:40:26,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-31 20:40:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 20:40:26,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:26,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 20:40:26,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2046664786, now seen corresponding path program 1 times [2022-01-31 20:40:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:26,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799201447] [2022-01-31 20:40:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:26,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,091 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:26,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,217 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:26,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:26,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799201447] [2022-01-31 20:40:26,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [799201447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:26,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:26,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 20:40:26,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822147340] [2022-01-31 20:40:26,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:26,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 20:40:26,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:26,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 20:40:26,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:40:26,304 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:26,342 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 20:40:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 20:40:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 20:40:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:26,344 INFO L225 Difference]: With dead ends: 31 [2022-01-31 20:40:26,344 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 20:40:26,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-31 20:40:26,347 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:26,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 20:40:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 20:40:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 20:40:26,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-01-31 20:40:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:26,351 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 20:40:26,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 20:40:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 20:40:26,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:26,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:26,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 20:40:26,352 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1412427221, now seen corresponding path program 2 times [2022-01-31 20:40:26,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380756964] [2022-01-31 20:40:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:26,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,387 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:26,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,490 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:26,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:26,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:26,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380756964] [2022-01-31 20:40:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [380756964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:26,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:26,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 20:40:26,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142044600] [2022-01-31 20:40:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:26,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 20:40:26,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 20:40:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 20:40:26,571 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:26,620 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 20:40:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 20:40:26,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 20:40:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:26,622 INFO L225 Difference]: With dead ends: 34 [2022-01-31 20:40:26,622 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 20:40:26,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-31 20:40:26,623 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:26,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 20:40:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 20:40:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-31 20:40:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 20:40:26,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-01-31 20:40:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:26,630 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 20:40:26,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 20:40:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 20:40:26,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:26,631 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:26,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 20:40:26,631 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -402263410, now seen corresponding path program 3 times [2022-01-31 20:40:26,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:26,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180511085] [2022-01-31 20:40:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:26,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,662 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:26,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:26,775 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:26,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:26,938 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180511085] [2022-01-31 20:40:26,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180511085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:26,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:26,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 20:40:26,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435003312] [2022-01-31 20:40:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:40:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:40:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:40:26,941 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:27,120 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-31 20:40:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 20:40:27,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 20:40:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:27,122 INFO L225 Difference]: With dead ends: 40 [2022-01-31 20:40:27,122 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 20:40:27,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-31 20:40:27,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:27,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 58 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 20:40:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 20:40:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-01-31 20:40:27,130 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-01-31 20:40:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:27,130 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-01-31 20:40:27,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-01-31 20:40:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 20:40:27,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:27,131 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:27,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 20:40:27,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1448012981, now seen corresponding path program 4 times [2022-01-31 20:40:27,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:27,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225966445] [2022-01-31 20:40:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:27,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,167 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:27,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,255 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:27,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:27,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:27,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225966445] [2022-01-31 20:40:27,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225966445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:27,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:27,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 20:40:27,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276247696] [2022-01-31 20:40:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:27,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 20:40:27,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 20:40:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:40:27,435 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:27,662 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-01-31 20:40:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 20:40:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 20:40:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:27,664 INFO L225 Difference]: With dead ends: 46 [2022-01-31 20:40:27,664 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 20:40:27,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-31 20:40:27,665 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:27,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 78 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 20:40:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-01-31 20:40:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-01-31 20:40:27,671 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 26 [2022-01-31 20:40:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:27,671 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-01-31 20:40:27,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-01-31 20:40:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 20:40:27,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:27,672 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:27,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 20:40:27,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1841039991, now seen corresponding path program 5 times [2022-01-31 20:40:27,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:27,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098317905] [2022-01-31 20:40:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:27,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,732 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:27,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:27,799 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:27,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:27,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098317905] [2022-01-31 20:40:27,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098317905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:27,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:27,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 20:40:27,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752293300] [2022-01-31 20:40:27,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:27,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 20:40:27,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 20:40:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-31 20:40:27,958 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:28,168 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-01-31 20:40:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 20:40:28,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 20:40:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:28,169 INFO L225 Difference]: With dead ends: 49 [2022-01-31 20:40:28,169 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 20:40:28,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-31 20:40:28,170 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:28,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 68 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 20:40:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-01-31 20:40:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-01-31 20:40:28,175 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-01-31 20:40:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:28,176 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-01-31 20:40:28,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-01-31 20:40:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:40:28,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:28,176 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:28,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 20:40:28,177 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 319282542, now seen corresponding path program 6 times [2022-01-31 20:40:28,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10616456] [2022-01-31 20:40:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:28,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,213 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 20:40:28,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,293 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:28,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:28,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:28,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:28,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10616456] [2022-01-31 20:40:28,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [10616456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:28,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:28,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 20:40:28,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119791132] [2022-01-31 20:40:28,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:28,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 20:40:28,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 20:40:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-31 20:40:28,507 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:28,766 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-01-31 20:40:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 20:40:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:40:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:28,767 INFO L225 Difference]: With dead ends: 53 [2022-01-31 20:40:28,768 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 20:40:28,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:40:28,768 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:28,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 20:40:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-01-31 20:40:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-01-31 20:40:28,773 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2022-01-31 20:40:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:28,774 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-01-31 20:40:28,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-01-31 20:40:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:40:28,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:28,774 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:28,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 20:40:28,775 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:28,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash -73744468, now seen corresponding path program 7 times [2022-01-31 20:40:28,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:28,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311346508] [2022-01-31 20:40:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:28,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,862 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:28,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:28,956 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:28,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:29,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:29,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:29,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311346508] [2022-01-31 20:40:29,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [311346508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:29,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:29,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:40:29,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947799282] [2022-01-31 20:40:29,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:29,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:40:29,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:40:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:40:29,167 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:29,423 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-01-31 20:40:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:40:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:40:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:29,424 INFO L225 Difference]: With dead ends: 55 [2022-01-31 20:40:29,424 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 20:40:29,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:40:29,425 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:29,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 20:40:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-01-31 20:40:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-01-31 20:40:29,430 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2022-01-31 20:40:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:29,431 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-01-31 20:40:29,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-01-31 20:40:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 20:40:29,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:29,431 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:29,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 20:40:29,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash -660550482, now seen corresponding path program 8 times [2022-01-31 20:40:29,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:29,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114037059] [2022-01-31 20:40:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:29,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,535 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:29,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,615 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:29,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:29,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:29,685 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:29,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114037059] [2022-01-31 20:40:29,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2114037059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:29,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:29,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 20:40:29,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126612365] [2022-01-31 20:40:29,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:29,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 20:40:29,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:29,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 20:40:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 20:40:29,687 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:29,800 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-01-31 20:40:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 20:40:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 20:40:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:29,801 INFO L225 Difference]: With dead ends: 58 [2022-01-31 20:40:29,801 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 20:40:29,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-31 20:40:29,802 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:29,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 20:40:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-01-31 20:40:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-31 20:40:29,806 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-01-31 20:40:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:29,806 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-31 20:40:29,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-31 20:40:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 20:40:29,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:29,807 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:29,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 20:40:29,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash 110192489, now seen corresponding path program 9 times [2022-01-31 20:40:29,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:29,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680895452] [2022-01-31 20:40:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:29,835 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,876 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:29,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:29,943 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:29,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:29,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:30,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:30,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680895452] [2022-01-31 20:40:30,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [680895452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:30,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:30,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 20:40:30,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138878658] [2022-01-31 20:40:30,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:30,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 20:40:30,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 20:40:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-31 20:40:30,177 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:30,387 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-01-31 20:40:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:40:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 20:40:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:30,388 INFO L225 Difference]: With dead ends: 46 [2022-01-31 20:40:30,388 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 20:40:30,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-01-31 20:40:30,389 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:30,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 83 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 20:40:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 20:40:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-31 20:40:30,394 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-01-31 20:40:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:30,394 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-31 20:40:30,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-31 20:40:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 20:40:30,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:40:30,395 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:40:30,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 20:40:30,395 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:40:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:40:30,395 INFO L85 PathProgramCache]: Analyzing trace with hash 418877134, now seen corresponding path program 10 times [2022-01-31 20:40:30,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:40:30,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612846607] [2022-01-31 20:40:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:40:30,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,476 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:30,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 20:40:30,543 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 20:40:30,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:40:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:30,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:40:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:40:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:40:30,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:40:30,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612846607] [2022-01-31 20:40:30,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [612846607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:40:30,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:40:30,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 20:40:30,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405445086] [2022-01-31 20:40:30,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:40:30,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 20:40:30,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:40:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 20:40:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-31 20:40:30,753 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:40:30,935 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2022-01-31 20:40:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 20:40:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 35 [2022-01-31 20:40:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:40:30,935 INFO L225 Difference]: With dead ends: 43 [2022-01-31 20:40:30,935 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 20:40:30,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-31 20:40:30,936 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:40:30,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 59 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 20:40:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 20:40:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 20:40:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 20:40:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 20:40:30,937 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-01-31 20:40:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:40:30,937 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 20:40:30,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:40:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 20:40:30,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 20:40:30,939 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 20:40:30,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 20:40:30,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 20:40:31,453 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-01-31 20:40:31,453 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-01-31 20:40:31,453 INFO L858 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-01-31 20:40:31,453 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 22 29) the Hoare annotation is: true [2022-01-31 20:40:31,453 INFO L854 garLoopResultBuilder]: At program point L25(lines 25 26) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~sn~0 0) (= main_~i~0 1)) (and .cse0 (= main_~i~0 8)) (and (= main_~i~0 3) (= main_~sn~0 4)) (and .cse0 (= main_~i~0 4)) (and .cse0 (= main_~i~0 6)) (and .cse0 (= 5 main_~i~0)) (and .cse0 (= 7 main_~i~0)) (and (= main_~i~0 2) (= 2 main_~sn~0)))) [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point mainEXIT(lines 22 29) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L854 garLoopResultBuilder]: At program point L24-2(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 2) (= main_~sn~0 4)) (and (= main_~i~0 3) .cse0) (and .cse0 (= main_~i~0 4)) (and .cse0 (not (< main_~i~0 5)) (< main_~i~0 6)) (and .cse0 (= main_~i~0 6)) (= main_~i~0 8) (and .cse0 (= 7 main_~i~0)) (and (= main_~i~0 1) (= 2 main_~sn~0)))) [2022-01-31 20:40:31,454 INFO L854 garLoopResultBuilder]: At program point L24-3(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~sn~0 0) (= main_~i~0 1)) (and .cse0 (= main_~i~0 8)) (and (= main_~i~0 3) (= main_~sn~0 4)) (and .cse0 (= main_~i~0 4)) (and .cse0 (= main_~i~0 6)) (and .cse0 (= 5 main_~i~0)) (= main_~i~0 9) (and .cse0 (= 7 main_~i~0)) (and (= main_~i~0 2) (= 2 main_~sn~0)))) [2022-01-31 20:40:31,454 INFO L854 garLoopResultBuilder]: At program point L24-4(lines 24 27) the Hoare annotation is: (= (+ main_~i~0 (- 3)) 6) [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point mainFINAL(lines 22 29) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-01-31 20:40:31,454 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (or (not (= main_~i~0 9)) (and (not (= |__VERIFIER_assert_#in~cond| 0)) (not (= |__VERIFIER_assert_#in~cond| 1))) (and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0))) [2022-01-31 20:40:31,454 INFO L854 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (not (= main_~i~0 9)) (and (not (= |__VERIFIER_assert_#in~cond| 0)) (not (= |__VERIFIER_assert_#in~cond| 1))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-01-31 20:40:31,455 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2022-01-31 20:40:31,455 INFO L861 garLoopResultBuilder]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2022-01-31 20:40:31,455 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2022-01-31 20:40:31,455 INFO L854 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (or (and (not (= |__VERIFIER_assert_#in~cond| 0)) (not (= |__VERIFIER_assert_#in~cond| 1))) (not (= (+ main_~i~0 (- 3)) 6))) [2022-01-31 20:40:31,457 INFO L732 BasicCegarLoop]: Path program histogram: [10, 1, 1, 1] [2022-01-31 20:40:31,458 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 20:40:31,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:40:31 BoogieIcfgContainer [2022-01-31 20:40:31,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 20:40:31,467 INFO L158 Benchmark]: Toolchain (without parser) took 6723.24ms. Allocated memory was 185.6MB in the beginning and 250.6MB in the end (delta: 65.0MB). Free memory was 132.6MB in the beginning and 190.5MB in the end (delta: -57.9MB). Peak memory consumption was 118.4MB. Max. memory is 8.0GB. [2022-01-31 20:40:31,468 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 185.6MB. Free memory is still 149.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 20:40:31,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.50ms. Allocated memory was 185.6MB in the beginning and 250.6MB in the end (delta: 65.0MB). Free memory was 132.4MB in the beginning and 223.8MB in the end (delta: -91.4MB). Peak memory consumption was 7.0MB. Max. memory is 8.0GB. [2022-01-31 20:40:31,468 INFO L158 Benchmark]: Boogie Preprocessor took 16.06ms. Allocated memory is still 250.6MB. Free memory was 223.8MB in the beginning and 222.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 20:40:31,468 INFO L158 Benchmark]: RCFGBuilder took 178.44ms. Allocated memory is still 250.6MB. Free memory was 222.8MB in the beginning and 212.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 20:40:31,468 INFO L158 Benchmark]: TraceAbstraction took 6343.89ms. Allocated memory is still 250.6MB. Free memory was 211.8MB in the beginning and 190.5MB in the end (delta: 21.3MB). Peak memory consumption was 133.4MB. Max. memory is 8.0GB. [2022-01-31 20:40:31,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 185.6MB. Free memory is still 149.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.50ms. Allocated memory was 185.6MB in the beginning and 250.6MB in the end (delta: 65.0MB). Free memory was 132.4MB in the beginning and 223.8MB in the end (delta: -91.4MB). Peak memory consumption was 7.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.06ms. Allocated memory is still 250.6MB. Free memory was 223.8MB in the beginning and 222.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 178.44ms. Allocated memory is still 250.6MB. Free memory was 222.8MB in the beginning and 212.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 6343.89ms. Allocated memory is still 250.6MB. Free memory was 211.8MB in the beginning and 190.5MB in the end (delta: 21.3MB). Peak memory consumption was 133.4MB. 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 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 13, TraceHistogramMax: 8, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 249 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 653 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 502 mSDsCounter, 153 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2537 IncrementalHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 153 mSolverCounterUnsat, 151 mSDtfsCounter, 2537 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 114 SyntacticMatches, 40 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=9, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 28 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 98 PreInvPairs, 154 NumberOfFragments, 252 HoareAnnotationTreeSize, 98 FomulaSimplifications, 2163 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 20 FomulaSimplificationsInter, 743 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((sn == 0 && i == 1) || (6 == sn && i == 8)) || (i == 3 && sn == 4)) || (6 == sn && i == 4)) || (6 == sn && i == 6)) || (6 == sn && 5 == i)) || i == 9) || (6 == sn && 7 == i)) || (i == 2 && 2 == sn) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-01-31 20:40:31,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...