/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:45:21,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:45:21,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:45:22,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:45:22,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:45:22,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:45:22,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:45:22,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:45:22,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:45:22,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:45:22,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:45:22,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:45:22,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:45:22,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:45:22,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:45:22,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:45:22,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:45:22,122 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:45:22,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:45:22,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:45:22,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:45:22,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:45:22,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:45:22,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:22,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:45:22,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:45:22,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:45:22,123 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:45:22,123 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:45:22,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:45:22,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:45:22,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:45:22,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:45:22,371 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:45:22,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2022-02-24 02:45:22,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c48f4651f/427b317d29974b9e894d2ddde4c5c77e/FLAGd57dad201 [2022-02-24 02:45:22,801 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:45:22,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2022-02-24 02:45:22,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c48f4651f/427b317d29974b9e894d2ddde4c5c77e/FLAGd57dad201 [2022-02-24 02:45:22,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c48f4651f/427b317d29974b9e894d2ddde4c5c77e [2022-02-24 02:45:22,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:45:22,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:45:22,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:22,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:45:22,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:45:22,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:22" (1/1) ... [2022-02-24 02:45:22,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2fb518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:22, skipping insertion in model container [2022-02-24 02:45:22,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:45:22" (1/1) ... [2022-02-24 02:45:22,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:45:22,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:45:22,976 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/ludcmp.c[318,331] [2022-02-24 02:45:23,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:23,041 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:45:23,049 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/ludcmp.c[318,331] [2022-02-24 02:45:23,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:45:23,077 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:45:23,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23 WrapperNode [2022-02-24 02:45:23,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:45:23,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:45:23,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:45:23,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:45:23,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:45:23,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:45:23,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:45:23,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:45:23,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (1/1) ... [2022-02-24 02:45:23,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:45:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:45:23,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 02:45:23,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 02:45:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:45:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:45:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:45:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:45:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2022-02-24 02:45:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:45:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2022-02-24 02:45:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:45:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:45:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:45:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:45:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:45:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:45:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:45:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:45:23,249 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:45:23,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:45:23,546 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:45:23,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:45:23,551 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-02-24 02:45:23,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:23 BoogieIcfgContainer [2022-02-24 02:45:23,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:45:23,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:45:23,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:45:23,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:45:23,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:45:22" (1/3) ... [2022-02-24 02:45:23,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a52ae3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:23, skipping insertion in model container [2022-02-24 02:45:23,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:45:23" (2/3) ... [2022-02-24 02:45:23,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a52ae3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:45:23, skipping insertion in model container [2022-02-24 02:45:23,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:45:23" (3/3) ... [2022-02-24 02:45:23,565 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2022-02-24 02:45:23,569 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:45:23,569 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:45:23,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:45:23,627 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=QVASR [2022-02-24 02:45:23,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:45:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:45:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 02:45:23,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:23,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:23,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:23,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1448102218, now seen corresponding path program 1 times [2022-02-24 02:45:23,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:23,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974537864] [2022-02-24 02:45:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:23,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:23,724 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:23,890 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:23,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974537864] [2022-02-24 02:45:23,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974537864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:23,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:23,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:45:23,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805407838] [2022-02-24 02:45:23,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:23,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:45:23,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:23,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:45:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:45:23,923 INFO L87 Difference]: Start difference. First operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,108 INFO L93 Difference]: Finished difference Result 147 states and 225 transitions. [2022-02-24 02:45:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:45:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 02:45:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,120 INFO L225 Difference]: With dead ends: 147 [2022-02-24 02:45:24,120 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 02:45:24,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:45:24,127 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 73 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 02:45:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-02-24 02:45:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-02-24 02:45:24,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-02-24 02:45:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,166 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-02-24 02:45:24,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-02-24 02:45:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 02:45:24,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:45:24,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1436096445, now seen corresponding path program 1 times [2022-02-24 02:45:24,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676206811] [2022-02-24 02:45:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,173 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:45:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676206811] [2022-02-24 02:45:24,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676206811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 02:45:24,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766346202] [2022-02-24 02:45:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 02:45:24,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 02:45:24,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:45:24,304 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,391 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-02-24 02:45:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:24,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 02:45:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,393 INFO L225 Difference]: With dead ends: 40 [2022-02-24 02:45:24,393 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 02:45:24,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:24,398 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 25 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 02:45:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-02-24 02:45:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-24 02:45:24,413 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-02-24 02:45:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,414 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-24 02:45:24,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-24 02:45:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 02:45:24,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:45:24,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1858105272, now seen corresponding path program 1 times [2022-02-24 02:45:24,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892880169] [2022-02-24 02:45:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,444 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,444 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892880169] [2022-02-24 02:45:24,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892880169] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:24,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74944002] [2022-02-24 02:45:24,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:24,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:24,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:24,588 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,692 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-02-24 02:45:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 02:45:24,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 02:45:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,693 INFO L225 Difference]: With dead ends: 45 [2022-02-24 02:45:24,694 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 02:45:24,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:24,695 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 02:45:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-02-24 02:45:24,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-24 02:45:24,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-02-24 02:45:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,701 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-24 02:45:24,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-24 02:45:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 02:45:24,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 02:45:24,703 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1949651507, now seen corresponding path program 2 times [2022-02-24 02:45:24,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600496189] [2022-02-24 02:45:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,712 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,713 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600496189] [2022-02-24 02:45:24,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [600496189] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,788 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 02:45:24,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789616852] [2022-02-24 02:45:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 02:45:24,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 02:45:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 02:45:24,789 INFO L87 Difference]: Start difference. First operand 25 states and 28 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) [2022-02-24 02:45:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:24,884 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-02-24 02:45:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 02:45:24,884 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 [2022-02-24 02:45:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:24,885 INFO L225 Difference]: With dead ends: 57 [2022-02-24 02:45:24,885 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 02:45:24,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:24,886 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:24,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:45:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 02:45:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-02-24 02:45:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-02-24 02:45:24,895 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2022-02-24 02:45:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:24,896 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-02-24 02:45:24,896 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) [2022-02-24 02:45:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-02-24 02:45:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 02:45:24,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:24,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:24,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 02:45:24,897 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1140304881, now seen corresponding path program 1 times [2022-02-24 02:45:24,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:24,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508141208] [2022-02-24 02:45:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:24,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:24,905 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:24,905 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:24,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:24,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508141208] [2022-02-24 02:45:24,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508141208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:24,983 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:24,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 02:45:24,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766949934] [2022-02-24 02:45:24,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:24,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 02:45:24,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:24,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 02:45:24,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 02:45:24,984 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-02-24 02:45:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:25,066 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-02-24 02:45:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 02:45:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2022-02-24 02:45:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:25,069 INFO L225 Difference]: With dead ends: 68 [2022-02-24 02:45:25,069 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 02:45:25,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:25,070 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:25,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 02:45:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-02-24 02:45:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-02-24 02:45:25,078 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 20 [2022-02-24 02:45:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:25,079 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-02-24 02:45:25,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2022-02-24 02:45:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-02-24 02:45:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 02:45:25,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:25,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:25,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 02:45:25,080 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash -162258006, now seen corresponding path program 2 times [2022-02-24 02:45:25,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:25,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093346933] [2022-02-24 02:45:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:25,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:25,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:25,089 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093346933] [2022-02-24 02:45:25,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093346933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,175 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 02:45:25,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645769707] [2022-02-24 02:45:25,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 02:45:25,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 02:45:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-24 02:45:25,177 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:25,268 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-02-24 02:45:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 02:45:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 02:45:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:25,270 INFO L225 Difference]: With dead ends: 80 [2022-02-24 02:45:25,271 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 02:45:25,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:25,273 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:25,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 37 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 02:45:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-02-24 02:45:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-02-24 02:45:25,286 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-02-24 02:45:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:25,286 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-02-24 02:45:25,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-02-24 02:45:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 02:45:25,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:25,287 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:25,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 02:45:25,287 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1312024861, now seen corresponding path program 3 times [2022-02-24 02:45:25,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:25,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542376631] [2022-02-24 02:45:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:25,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:25,298 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542376631] [2022-02-24 02:45:25,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [542376631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 02:45:25,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674222303] [2022-02-24 02:45:25,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 02:45:25,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 02:45:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 02:45:25,408 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:25,501 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-02-24 02:45:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 02:45:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 02:45:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:25,504 INFO L225 Difference]: With dead ends: 92 [2022-02-24 02:45:25,504 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 02:45:25,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-02-24 02:45:25,505 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:25,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 02:45:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-02-24 02:45:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-02-24 02:45:25,519 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2022-02-24 02:45:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:25,519 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-02-24 02:45:25,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:45:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-02-24 02:45:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 02:45:25,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:25,520 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:25,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 02:45:25,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1026934172, now seen corresponding path program 4 times [2022-02-24 02:45:25,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:25,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635314117] [2022-02-24 02:45:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:25,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:25,531 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:45:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:45:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:45:25,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:45:25,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635314117] [2022-02-24 02:45:25,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635314117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:45:25,631 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:45:25,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 02:45:25,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902102680] [2022-02-24 02:45:25,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:45:25,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 02:45:25,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:45:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 02:45:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-24 02:45:25,633 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2022-02-24 02:45:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:45:25,719 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-02-24 02:45:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 02:45:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 [2022-02-24 02:45:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:45:25,721 INFO L225 Difference]: With dead ends: 98 [2022-02-24 02:45:25,721 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 02:45:25,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-02-24 02:45:25,722 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 02:45:25,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 02:45:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 02:45:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-24 02:45:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 02:45:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-02-24 02:45:25,736 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 32 [2022-02-24 02:45:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:45:25,736 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-02-24 02:45:25,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2022-02-24 02:45:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-02-24 02:45:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 02:45:25,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:45:25,739 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:45:25,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 02:45:25,739 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:45:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:45:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1975029803, now seen corresponding path program 5 times [2022-02-24 02:45:25,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:45:25,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306242742] [2022-02-24 02:45:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:45:25,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:45:25,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-24 02:45:25,746 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 02:45:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 02:45:25,766 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 02:45:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 02:45:25,790 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 02:45:25,791 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 02:45:25,793 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 02:45:25,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 02:45:25,796 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1] [2022-02-24 02:45:25,798 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 02:45:25,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 02:45:25 BoogieIcfgContainer [2022-02-24 02:45:25,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 02:45:25,808 INFO L158 Benchmark]: Toolchain (without parser) took 2981.65ms. Allocated memory was 190.8MB in the beginning and 313.5MB in the end (delta: 122.7MB). Free memory was 135.3MB in the beginning and 206.2MB in the end (delta: -70.8MB). Peak memory consumption was 52.7MB. Max. memory is 8.0GB. [2022-02-24 02:45:25,809 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 190.8MB. Free memory is still 152.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 02:45:25,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.72ms. Allocated memory was 190.8MB in the beginning and 313.5MB in the end (delta: 122.7MB). Free memory was 135.2MB in the beginning and 284.0MB in the end (delta: -148.7MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-02-24 02:45:25,809 INFO L158 Benchmark]: Boogie Preprocessor took 32.40ms. Allocated memory is still 313.5MB. Free memory was 284.0MB in the beginning and 281.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 02:45:25,809 INFO L158 Benchmark]: RCFGBuilder took 444.06ms. Allocated memory is still 313.5MB. Free memory was 281.9MB in the beginning and 264.0MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-02-24 02:45:25,809 INFO L158 Benchmark]: TraceAbstraction took 2248.94ms. Allocated memory is still 313.5MB. Free memory was 264.0MB in the beginning and 206.2MB in the end (delta: 57.8MB). Peak memory consumption was 58.4MB. Max. memory is 8.0GB. [2022-02-24 02:45:25,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 190.8MB. Free memory is still 152.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.72ms. Allocated memory was 190.8MB in the beginning and 313.5MB in the end (delta: 122.7MB). Free memory was 135.2MB in the beginning and 284.0MB in the end (delta: -148.7MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.40ms. Allocated memory is still 313.5MB. Free memory was 284.0MB in the beginning and 281.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 444.06ms. Allocated memory is still 313.5MB. Free memory was 281.9MB in the beginning and 264.0MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 2248.94ms. Allocated memory is still 313.5MB. Free memory was 264.0MB in the beginning and 206.2MB in the end (delta: 57.8MB). Peak memory consumption was 58.4MB. 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 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 262 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 253 mSDsluCounter, 309 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 134 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 435 IncrementalHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 175 mSDtfsCounter, 435 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, InterpolantAutomatonStates: 67, 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, 8 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-02-24 02:45:25,832 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...