/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 15:46:35,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 15:46:35,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 15:46:35,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 15:46:35,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 15:46:35,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 15:46:35,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 15:46:35,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 15:46:35,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 15:46:35,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 15:46:35,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 15:46:35,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 15:46:35,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 15:46:36,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 15:46:36,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 15:46:36,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 15:46:36,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 15:46:36,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 15:46:36,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 15:46:36,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 15:46:36,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 15:46:36,031 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 15:46:36,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 15:46:36,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 15:46:36,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 15:46:36,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 15:46:36,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 15:46:36,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 15:46:36,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 15:46:36,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 15:46:36,035 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 15:46:36,036 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 15:46:36,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 15:46:36,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 15:46:36,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 15:46:36,245 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 15:46:36,245 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 15:46:36,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-02-23 15:46:36,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e49a17ab/c0f8776889654b09b4c8f1aaa2b47c5f/FLAGa48a99d8e [2022-02-23 15:46:36,662 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 15:46:36,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-02-23 15:46:36,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e49a17ab/c0f8776889654b09b4c8f1aaa2b47c5f/FLAGa48a99d8e [2022-02-23 15:46:36,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e49a17ab/c0f8776889654b09b4c8f1aaa2b47c5f [2022-02-23 15:46:36,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 15:46:36,680 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 15:46:36,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 15:46:36,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 15:46:36,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 15:46:36,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d6ae02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36, skipping insertion in model container [2022-02-23 15:46:36,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 15:46:36,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 15:46:36,850 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i[810,823] [2022-02-23 15:46:36,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 15:46:36,889 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 15:46:36,903 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i[810,823] [2022-02-23 15:46:36,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 15:46:36,939 INFO L208 MainTranslator]: Completed translation [2022-02-23 15:46:36,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36 WrapperNode [2022-02-23 15:46:36,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 15:46:36,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 15:46:36,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 15:46:36,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 15:46:36,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 15:46:36,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 15:46:36,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 15:46:36,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 15:46:36,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (1/1) ... [2022-02-23 15:46:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 15:46:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:37,020 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) [2022-02-23 15:46:37,046 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 [2022-02-23 15:46:37,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 15:46:37,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 15:46:37,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 15:46:37,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 15:46:37,061 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-02-23 15:46:37,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 15:46:37,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 15:46:37,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 15:46:37,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 15:46:37,063 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 15:46:37,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 15:46:37,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 15:46:37,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 15:46:37,063 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-02-23 15:46:37,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 15:46:37,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 15:46:37,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 15:46:37,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 15:46:37,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 15:46:37,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 15:46:37,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 15:46:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 15:46:37,155 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 15:46:37,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 15:46:37,291 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 15:46:37,304 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 15:46:37,304 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-23 15:46:37,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 03:46:37 BoogieIcfgContainer [2022-02-23 15:46:37,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 15:46:37,309 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 15:46:37,309 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 15:46:37,310 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 15:46:37,313 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 03:46:37" (1/1) ... [2022-02-23 15:46:37,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 03:46:37 BasicIcfg [2022-02-23 15:46:37,335 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 15:46:37,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 15:46:37,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 15:46:37,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 15:46:37,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 03:46:36" (1/4) ... [2022-02-23 15:46:37,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d2be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 03:46:37, skipping insertion in model container [2022-02-23 15:46:37,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 03:46:36" (2/4) ... [2022-02-23 15:46:37,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d2be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 03:46:37, skipping insertion in model container [2022-02-23 15:46:37,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 03:46:37" (3/4) ... [2022-02-23 15:46:37,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d2be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 03:46:37, skipping insertion in model container [2022-02-23 15:46:37,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 03:46:37" (4/4) ... [2022-02-23 15:46:37,342 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.iJordan [2022-02-23 15:46:37,347 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 15:46:37,347 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 15:46:37,383 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 15:46:37,395 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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=FAST_UPR [2022-02-23 15:46:37,395 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 15:46:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 15:46:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 15:46:37,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:37,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:37,424 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1326105583, now seen corresponding path program 1 times [2022-02-23 15:46:37,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:37,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726744835] [2022-02-23 15:46:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:37,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:37,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 15:46:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 15:46:37,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:37,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726744835] [2022-02-23 15:46:37,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726744835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 15:46:37,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 15:46:37,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 15:46:37,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594985287] [2022-02-23 15:46:37,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 15:46:37,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 15:46:37,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 15:46:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 15:46:37,668 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 15:46:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:37,834 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-02-23 15:46:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 15:46:37,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 15:46:37,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:37,844 INFO L225 Difference]: With dead ends: 51 [2022-02-23 15:46:37,844 INFO L226 Difference]: Without dead ends: 43 [2022-02-23 15:46:37,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 15:46:37,850 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:37,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 15:46:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-23 15:46:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-02-23 15:46:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-23 15:46:37,885 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-02-23 15:46:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:37,885 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-23 15:46:37,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 15:46:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-23 15:46:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 15:46:37,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:37,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 15:46:37,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489969, now seen corresponding path program 1 times [2022-02-23 15:46:37,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:37,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002428122] [2022-02-23 15:46:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:37,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-23 15:46:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 15:46:38,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:38,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002428122] [2022-02-23 15:46:38,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002428122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 15:46:38,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 15:46:38,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 15:46:38,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615927459] [2022-02-23 15:46:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 15:46:38,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 15:46:38,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 15:46:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 15:46:38,039 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 15:46:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:38,177 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-02-23 15:46:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 15:46:38,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 15:46:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:38,180 INFO L225 Difference]: With dead ends: 38 [2022-02-23 15:46:38,180 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 15:46:38,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-23 15:46:38,188 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:38,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 15:46:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 15:46:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-02-23 15:46:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-23 15:46:38,205 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-02-23 15:46:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:38,205 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-23 15:46:38,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 15:46:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-23 15:46:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 15:46:38,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:38,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:38,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 15:46:38,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash 43929779, now seen corresponding path program 1 times [2022-02-23 15:46:38,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:38,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849716383] [2022-02-23 15:46:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:38,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-02-23 15:46:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 15:46:38,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:38,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849716383] [2022-02-23 15:46:38,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849716383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:38,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021908361] [2022-02-23 15:46:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:38,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:38,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:38,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 15:46:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:38,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 15:46:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 15:46:38,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 15:46:38,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021908361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:46:38,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:46:38,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-02-23 15:46:38,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428953845] [2022-02-23 15:46:38,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:38,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 15:46:38,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 15:46:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-23 15:46:38,577 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 15:46:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:38,755 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-02-23 15:46:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 15:46:38,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-02-23 15:46:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:38,758 INFO L225 Difference]: With dead ends: 47 [2022-02-23 15:46:38,758 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 15:46:38,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-23 15:46:38,762 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:38,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 15:46:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 15:46:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-02-23 15:46:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-02-23 15:46:38,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-02-23 15:46:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:38,775 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-02-23 15:46:38,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 15:46:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-02-23 15:46:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 15:46:38,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:38,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:38,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:38,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:38,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:38,988 INFO L85 PathProgramCache]: Analyzing trace with hash -969564551, now seen corresponding path program 2 times [2022-02-23 15:46:38,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:38,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787797131] [2022-02-23 15:46:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:38,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 15:46:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 15:46:39,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:39,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787797131] [2022-02-23 15:46:39,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787797131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 15:46:39,088 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 15:46:39,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 15:46:39,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068972974] [2022-02-23 15:46:39,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 15:46:39,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 15:46:39,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 15:46:39,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-23 15:46:39,090 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 15:46:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:39,279 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-02-23 15:46:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 15:46:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-02-23 15:46:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:39,281 INFO L225 Difference]: With dead ends: 42 [2022-02-23 15:46:39,281 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 15:46:39,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-02-23 15:46:39,290 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:39,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 15:46:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 15:46:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-02-23 15:46:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-02-23 15:46:39,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-02-23 15:46:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:39,299 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-02-23 15:46:39,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 15:46:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-02-23 15:46:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 15:46:39,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:39,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:39,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 15:46:39,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:39,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1845213134, now seen corresponding path program 1 times [2022-02-23 15:46:39,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:39,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072300216] [2022-02-23 15:46:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-23 15:46:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 15:46:39,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:39,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072300216] [2022-02-23 15:46:39,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072300216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:39,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228074957] [2022-02-23 15:46:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:39,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:39,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 15:46:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 15:46:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 15:46:39,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 15:46:39,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228074957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:46:39,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:46:39,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-02-23 15:46:39,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260580305] [2022-02-23 15:46:39,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:39,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 15:46:39,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:39,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 15:46:39,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-23 15:46:39,702 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 15:46:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:40,091 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-02-23 15:46:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 15:46:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2022-02-23 15:46:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:40,094 INFO L225 Difference]: With dead ends: 63 [2022-02-23 15:46:40,094 INFO L226 Difference]: Without dead ends: 63 [2022-02-23 15:46:40,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-02-23 15:46:40,095 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:40,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 38 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 15:46:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-23 15:46:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-02-23 15:46:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-02-23 15:46:40,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2022-02-23 15:46:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:40,105 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-02-23 15:46:40,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 15:46:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-02-23 15:46:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 15:46:40,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:40,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:40,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:40,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:40,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1453502491, now seen corresponding path program 1 times [2022-02-23 15:46:40,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:40,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438570382] [2022-02-23 15:46:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-02-23 15:46:40,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:40,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438570382] [2022-02-23 15:46:40,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438570382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:40,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963672930] [2022-02-23 15:46:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:40,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:40,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:40,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:40,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 15:46:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 15:46:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-02-23 15:46:40,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-02-23 15:46:40,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963672930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:46:40,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:46:40,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-02-23 15:46:40,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651393476] [2022-02-23 15:46:40,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:40,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 15:46:40,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 15:46:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-23 15:46:40,750 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 15:46:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:41,255 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-02-23 15:46:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 15:46:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2022-02-23 15:46:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:41,256 INFO L225 Difference]: With dead ends: 64 [2022-02-23 15:46:41,256 INFO L226 Difference]: Without dead ends: 64 [2022-02-23 15:46:41,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-02-23 15:46:41,258 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:41,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 32 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 15:46:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-23 15:46:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-02-23 15:46:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-02-23 15:46:41,262 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 35 [2022-02-23 15:46:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:41,262 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-02-23 15:46:41,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 15:46:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-02-23 15:46:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 15:46:41,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:41,264 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:41,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:41,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:41,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:41,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash -444702843, now seen corresponding path program 2 times [2022-02-23 15:46:41,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:41,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403246316] [2022-02-23 15:46:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:41,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:41,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-02-23 15:46:41,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:41,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403246316] [2022-02-23 15:46:41,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403246316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:41,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991987454] [2022-02-23 15:46:41,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 15:46:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:41,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:41,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 15:46:41,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 15:46:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:46:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 15:46:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-02-23 15:46:41,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-02-23 15:46:42,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991987454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:46:42,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:46:42,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 21 [2022-02-23 15:46:42,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137508214] [2022-02-23 15:46:42,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:42,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 15:46:42,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 15:46:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-23 15:46:42,227 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 15:46:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:42,698 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-02-23 15:46:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 15:46:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-02-23 15:46:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:42,699 INFO L225 Difference]: With dead ends: 69 [2022-02-23 15:46:42,699 INFO L226 Difference]: Without dead ends: 69 [2022-02-23 15:46:42,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-02-23 15:46:42,701 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:42,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 29 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 15:46:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-23 15:46:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-02-23 15:46:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-02-23 15:46:42,705 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 54 [2022-02-23 15:46:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-02-23 15:46:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 15:46:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-02-23 15:46:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 15:46:42,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:42,707 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:42,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:42,923 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -292182650, now seen corresponding path program 3 times [2022-02-23 15:46:42,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:42,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991011853] [2022-02-23 15:46:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:42,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-02-23 15:46:43,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:43,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991011853] [2022-02-23 15:46:43,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991011853] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:43,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27573669] [2022-02-23 15:46:43,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 15:46:43,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:43,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:43,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:43,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 15:46:43,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-02-23 15:46:43,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:46:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 15:46:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-02-23 15:46:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-02-23 15:46:43,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27573669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:46:43,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:46:43,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-02-23 15:46:43,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177983160] [2022-02-23 15:46:43,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:43,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 15:46:43,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 15:46:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-23 15:46:43,563 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 15:46:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:43,823 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-02-23 15:46:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 15:46:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2022-02-23 15:46:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:43,824 INFO L225 Difference]: With dead ends: 80 [2022-02-23 15:46:43,824 INFO L226 Difference]: Without dead ends: 80 [2022-02-23 15:46:43,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2022-02-23 15:46:43,825 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:43,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 30 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 15:46:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-23 15:46:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-23 15:46:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-02-23 15:46:43,830 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 57 [2022-02-23 15:46:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:43,830 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-02-23 15:46:43,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 15:46:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-02-23 15:46:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-23 15:46:43,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:43,831 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:43,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:44,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:44,036 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:44,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:44,036 INFO L85 PathProgramCache]: Analyzing trace with hash -582619515, now seen corresponding path program 4 times [2022-02-23 15:46:44,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:44,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101576452] [2022-02-23 15:46:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:44,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:44,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:44,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 15:46:44,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:44,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101576452] [2022-02-23 15:46:44,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101576452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:44,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969473870] [2022-02-23 15:46:44,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 15:46:44,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:44,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:44,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 15:46:44,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 15:46:44,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:46:44,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 15:46:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-02-23 15:46:44,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-02-23 15:46:44,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969473870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:46:44,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:46:44,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-02-23 15:46:44,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658943699] [2022-02-23 15:46:44,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:44,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 15:46:44,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 15:46:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-23 15:46:44,543 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 15:46:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:45,970 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-02-23 15:46:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-23 15:46:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-02-23 15:46:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:45,972 INFO L225 Difference]: With dead ends: 175 [2022-02-23 15:46:45,972 INFO L226 Difference]: Without dead ends: 175 [2022-02-23 15:46:45,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2022-02-23 15:46:45,974 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:45,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 39 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 15:46:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-23 15:46:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2022-02-23 15:46:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 108 states have internal predecessors, (138), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:45,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2022-02-23 15:46:45,980 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 69 [2022-02-23 15:46:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:45,981 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2022-02-23 15:46:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 15:46:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2022-02-23 15:46:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-23 15:46:45,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:45,982 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:46,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:46,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:46,200 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash -551286544, now seen corresponding path program 5 times [2022-02-23 15:46:46,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:46,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471517224] [2022-02-23 15:46:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:46,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-02-23 15:46:46,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:46,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471517224] [2022-02-23 15:46:46,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471517224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:46,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640236792] [2022-02-23 15:46:46,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 15:46:46,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:46,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:46,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 15:46:46,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-23 15:46:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:46:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 15:46:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:46,885 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-23 15:46:46,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-02-23 15:46:47,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-23 15:46:47,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-02-23 15:46:47,735 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-02-23 15:46:47,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-02-23 15:46:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-02-23 15:46:47,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:47,930 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_320 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_320) |c_main_~#array~1.base|) |c_main_~#array~1.offset|) 0)) is different from false [2022-02-23 15:46:47,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640236792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:47,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 15:46:47,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-02-23 15:46:47,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013840654] [2022-02-23 15:46:47,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:47,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 15:46:47,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:47,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 15:46:47,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=961, Unknown=9, NotChecked=62, Total=1122 [2022-02-23 15:46:47,934 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:48,899 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2022-02-23 15:46:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 15:46:48,899 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 78 [2022-02-23 15:46:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:48,900 INFO L225 Difference]: With dead ends: 124 [2022-02-23 15:46:48,900 INFO L226 Difference]: Without dead ends: 124 [2022-02-23 15:46:48,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2387, Unknown=14, NotChecked=100, Total=2756 [2022-02-23 15:46:48,902 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:48,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 722 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-02-23 15:46:48,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-23 15:46:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-02-23 15:46:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 15:46:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2022-02-23 15:46:48,908 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 78 [2022-02-23 15:46:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:48,908 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2022-02-23 15:46:48,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 15:46:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2022-02-23 15:46:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-23 15:46:48,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:48,910 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:48,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:49,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:49,124 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash 215004892, now seen corresponding path program 1 times [2022-02-23 15:46:49,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:49,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680009596] [2022-02-23 15:46:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:49,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:49,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-23 15:46:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-02-23 15:46:49,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:49,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680009596] [2022-02-23 15:46:49,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680009596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:49,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002493406] [2022-02-23 15:46:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:49,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:49,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:49,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 15:46:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:49,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-23 15:46:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:49,821 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-23 15:46:49,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-02-23 15:46:49,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 15:46:50,012 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-02-23 15:46:50,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-02-23 15:46:50,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-02-23 15:46:52,726 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 15:46:52,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-02-23 15:46:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-02-23 15:46:52,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:52,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_405 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_405) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 4)) 1)) is different from false [2022-02-23 15:46:52,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002493406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:52,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 15:46:52,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2022-02-23 15:46:52,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182683182] [2022-02-23 15:46:52,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:52,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 15:46:52,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 15:46:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1420, Unknown=12, NotChecked=76, Total=1640 [2022-02-23 15:46:52,953 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 15:46:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:54,290 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-02-23 15:46:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 15:46:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 86 [2022-02-23 15:46:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:54,291 INFO L225 Difference]: With dead ends: 135 [2022-02-23 15:46:54,291 INFO L226 Difference]: Without dead ends: 135 [2022-02-23 15:46:54,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=411, Invalid=3736, Unknown=17, NotChecked=126, Total=4290 [2022-02-23 15:46:54,293 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:54,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 201 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 641 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2022-02-23 15:46:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-23 15:46:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-02-23 15:46:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 119 states have internal predecessors, (148), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 15:46:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2022-02-23 15:46:54,298 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 86 [2022-02-23 15:46:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:54,298 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2022-02-23 15:46:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 15:46:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2022-02-23 15:46:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 15:46:54,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:54,299 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:54,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:54,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 15:46:54,522 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1130972984, now seen corresponding path program 2 times [2022-02-23 15:46:54,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:54,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044033402] [2022-02-23 15:46:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:55,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:55,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:55,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-23 15:46:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:55,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-23 15:46:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-02-23 15:46:55,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:55,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044033402] [2022-02-23 15:46:55,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044033402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:55,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256348169] [2022-02-23 15:46:55,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 15:46:55,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:55,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:55,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:55,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 15:46:55,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 15:46:55,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:46:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-23 15:46:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:55,307 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-02-23 15:46:55,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-02-23 15:46:55,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 15:46:55,478 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-02-23 15:46:55,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-02-23 15:46:55,534 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-02-23 15:46:55,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-02-23 15:46:55,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-02-23 15:46:56,360 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 15:46:56,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-02-23 15:46:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-02-23 15:46:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:46:56,619 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_492 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_492) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 8)))) is different from false [2022-02-23 15:46:56,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256348169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:56,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 15:46:56,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-02-23 15:46:56,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892243048] [2022-02-23 15:46:56,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 15:46:56,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-23 15:46:56,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:46:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-23 15:46:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1648, Unknown=11, NotChecked=82, Total=1892 [2022-02-23 15:46:56,622 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 15:46:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:46:57,845 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2022-02-23 15:46:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 15:46:57,845 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2022-02-23 15:46:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:46:57,846 INFO L225 Difference]: With dead ends: 140 [2022-02-23 15:46:57,846 INFO L226 Difference]: Without dead ends: 140 [2022-02-23 15:46:57,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=418, Invalid=3860, Unknown=16, NotChecked=128, Total=4422 [2022-02-23 15:46:57,848 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 15:46:57,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 256 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 847 Invalid, 0 Unknown, 149 Unchecked, 0.4s Time] [2022-02-23 15:46:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-23 15:46:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-02-23 15:46:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 125 states have internal predecessors, (154), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 15:46:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-02-23 15:46:57,855 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 94 [2022-02-23 15:46:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:46:57,856 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-02-23 15:46:57,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-23 15:46:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-02-23 15:46:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-23 15:46:57,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:46:57,857 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:46:57,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 15:46:58,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:58,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:46:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:46:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash 971116212, now seen corresponding path program 3 times [2022-02-23 15:46:58,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:46:58,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481351379] [2022-02-23 15:46:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:46:58,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:46:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:58,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:46:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:58,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:46:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:58,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-23 15:46:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:58,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-23 15:46:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:58,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-23 15:46:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:46:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-02-23 15:46:58,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:46:58,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481351379] [2022-02-23 15:46:58,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481351379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:46:58,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64310251] [2022-02-23 15:46:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 15:46:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:46:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:46:58,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:46:58,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 15:46:58,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-23 15:46:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:46:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 15:46:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:46:59,032 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-02-23 15:46:59,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-02-23 15:46:59,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 15:46:59,198 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-02-23 15:46:59,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-02-23 15:46:59,253 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-02-23 15:46:59,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-02-23 15:46:59,364 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-02-23 15:46:59,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2022-02-23 15:46:59,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-23 15:46:59,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-02-23 15:47:00,562 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-23 15:47:00,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-02-23 15:47:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-02-23 15:47:00,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:47:00,856 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_581 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_581) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 12)))) is different from false [2022-02-23 15:47:00,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64310251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:47:00,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 15:47:00,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-02-23 15:47:00,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817337067] [2022-02-23 15:47:00,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 15:47:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-23 15:47:00,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:47:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-23 15:47:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1884, Unknown=12, NotChecked=88, Total=2162 [2022-02-23 15:47:00,859 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 15:47:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:47:02,519 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2022-02-23 15:47:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 15:47:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 102 [2022-02-23 15:47:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:47:02,521 INFO L225 Difference]: With dead ends: 149 [2022-02-23 15:47:02,521 INFO L226 Difference]: Without dead ends: 149 [2022-02-23 15:47:02,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=519, Invalid=4724, Unknown=17, NotChecked=142, Total=5402 [2022-02-23 15:47:02,522 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 15:47:02,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 233 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 793 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-02-23 15:47:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-23 15:47:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-02-23 15:47:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 131 states have internal predecessors, (160), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 15:47:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2022-02-23 15:47:02,527 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 102 [2022-02-23 15:47:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:47:02,527 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2022-02-23 15:47:02,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-23 15:47:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2022-02-23 15:47:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-23 15:47:02,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:47:02,528 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:47:02,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 15:47:02,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 15:47:02,729 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:47:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:47:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1541490528, now seen corresponding path program 4 times [2022-02-23 15:47:02,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:47:02,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386245297] [2022-02-23 15:47:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:47:02,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:47:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:47:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:47:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-23 15:47:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-23 15:47:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-23 15:47:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-23 15:47:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-02-23 15:47:03,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:47:03,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386245297] [2022-02-23 15:47:03,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386245297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:47:03,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046871278] [2022-02-23 15:47:03,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 15:47:03,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:47:03,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:47:03,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:47:03,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 15:47:03,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 15:47:03,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:47:03,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 108 conjunts are in the unsatisfiable core [2022-02-23 15:47:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:47:03,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-23 15:47:03,680 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-02-23 15:47:03,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-02-23 15:47:03,718 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-02-23 15:47:03,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-02-23 15:47:03,756 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-02-23 15:47:03,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-02-23 15:47:03,797 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-02-23 15:47:03,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-02-23 15:47:06,016 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-02-23 15:47:06,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 12 [2022-02-23 15:47:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 271 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-23 15:47:06,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 15:47:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 13 proven. 154 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-02-23 15:47:10,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046871278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 15:47:10,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 15:47:10,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 21] total 65 [2022-02-23 15:47:10,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229390012] [2022-02-23 15:47:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 15:47:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-23 15:47:10,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:47:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-23 15:47:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3708, Unknown=2, NotChecked=0, Total=4160 [2022-02-23 15:47:10,659 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-02-23 15:47:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:47:24,982 INFO L93 Difference]: Finished difference Result 483 states and 635 transitions. [2022-02-23 15:47:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-23 15:47:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 110 [2022-02-23 15:47:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:47:24,985 INFO L225 Difference]: With dead ends: 483 [2022-02-23 15:47:24,986 INFO L226 Difference]: Without dead ends: 483 [2022-02-23 15:47:24,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4598 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1305, Invalid=11120, Unknown=7, NotChecked=0, Total=12432 [2022-02-23 15:47:24,989 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 214 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 15:47:24,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 187 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1742 Invalid, 0 Unknown, 1208 Unchecked, 0.7s Time] [2022-02-23 15:47:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-02-23 15:47:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 154. [2022-02-23 15:47:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 137 states have internal predecessors, (166), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 15:47:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-02-23 15:47:24,995 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 110 [2022-02-23 15:47:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:47:24,996 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-02-23 15:47:24,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-02-23 15:47:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-02-23 15:47:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-23 15:47:24,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 15:47:24,997 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 15:47:25,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 15:47:25,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 15:47:25,211 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 15:47:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 15:47:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -289884532, now seen corresponding path program 5 times [2022-02-23 15:47:25,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 15:47:25,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464074793] [2022-02-23 15:47:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 15:47:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 15:47:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 15:47:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 15:47:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-02-23 15:47:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-02-23 15:47:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-02-23 15:47:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-02-23 15:47:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-02-23 15:47:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 15:47:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-02-23 15:47:25,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 15:47:25,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464074793] [2022-02-23 15:47:25,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464074793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 15:47:25,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070630029] [2022-02-23 15:47:25,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 15:47:25,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 15:47:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 15:47:25,326 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 15:47:25,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 15:47:25,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-23 15:47:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 15:47:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 15:47:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 15:47:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-02-23 15:47:25,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 15:47:25,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070630029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 15:47:25,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 15:47:25,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-02-23 15:47:25,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665411661] [2022-02-23 15:47:25,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 15:47:25,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 15:47:25,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 15:47:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 15:47:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-23 15:47:25,730 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-23 15:47:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 15:47:25,767 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2022-02-23 15:47:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 15:47:25,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 118 [2022-02-23 15:47:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 15:47:25,768 INFO L225 Difference]: With dead ends: 147 [2022-02-23 15:47:25,768 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 15:47:25,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-23 15:47:25,769 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 15:47:25,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 15:47:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 15:47:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 15:47:25,770 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) [2022-02-23 15:47:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 15:47:25,770 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-02-23 15:47:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 15:47:25,770 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 15:47:25,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-23 15:47:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 15:47:25,770 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 15:47:25,773 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 15:47:25,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 15:47:25,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 15:47:25,976 INFO L732 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1, 1] [2022-02-23 15:47:25,977 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 15:47:25,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 03:47:25 BasicIcfg [2022-02-23 15:47:25,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 15:47:25,982 INFO L158 Benchmark]: Toolchain (without parser) took 49301.49ms. Allocated memory was 172.0MB in the beginning and 289.4MB in the end (delta: 117.4MB). Free memory was 117.8MB in the beginning and 155.1MB in the end (delta: -37.3MB). Peak memory consumption was 81.2MB. Max. memory is 8.0GB. [2022-02-23 15:47:25,982 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 172.0MB. Free memory is still 134.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 15:47:25,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.47ms. Allocated memory was 172.0MB in the beginning and 241.2MB in the end (delta: 69.2MB). Free memory was 117.6MB in the beginning and 211.9MB in the end (delta: -94.3MB). Peak memory consumption was 9.2MB. Max. memory is 8.0GB. [2022-02-23 15:47:25,982 INFO L158 Benchmark]: Boogie Preprocessor took 47.60ms. Allocated memory is still 241.2MB. Free memory was 211.9MB in the beginning and 210.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 15:47:25,983 INFO L158 Benchmark]: RCFGBuilder took 318.48ms. Allocated memory is still 241.2MB. Free memory was 210.3MB in the beginning and 198.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 15:47:25,983 INFO L158 Benchmark]: IcfgTransformer took 26.05ms. Allocated memory is still 241.2MB. Free memory was 198.3MB in the beginning and 196.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 15:47:25,983 INFO L158 Benchmark]: TraceAbstraction took 48644.55ms. Allocated memory was 241.2MB in the beginning and 289.4MB in the end (delta: 48.2MB). Free memory was 196.2MB in the beginning and 155.1MB in the end (delta: 41.0MB). Peak memory consumption was 89.8MB. Max. memory is 8.0GB. [2022-02-23 15:47:25,985 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 172.0MB. Free memory is still 134.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 258.47ms. Allocated memory was 172.0MB in the beginning and 241.2MB in the end (delta: 69.2MB). Free memory was 117.6MB in the beginning and 211.9MB in the end (delta: -94.3MB). Peak memory consumption was 9.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.60ms. Allocated memory is still 241.2MB. Free memory was 211.9MB in the beginning and 210.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 318.48ms. Allocated memory is still 241.2MB. Free memory was 210.3MB in the beginning and 198.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 26.05ms. Allocated memory is still 241.2MB. Free memory was 198.3MB in the beginning and 196.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 48644.55ms. Allocated memory was 241.2MB in the beginning and 289.4MB in the end (delta: 48.2MB). Free memory was 196.2MB in the beginning and 155.1MB in the end (delta: 41.0MB). Peak memory consumption was 89.8MB. 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.6s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 23.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1871 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 1425 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1685 IncrementalHoareTripleChecker+Unchecked, 1025 mSDsCounter, 998 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6692 IncrementalHoareTripleChecker+Invalid, 9375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 998 mSolverCounterUnsat, 400 mSDtfsCounter, 6692 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1834 GetRequests, 1190 SyntacticMatches, 68 SemanticMatches, 576 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 10003 ImplicationChecksByTransitivity, 31.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=14, InterpolantAutomatonStates: 311, 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, 15 MinimizatonAttempts, 473 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 20.3s InterpolantComputationTime, 1768 NumberOfCodeBlocks, 1761 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2109 ConstructedInterpolants, 274 QuantifiedInterpolants, 17170 SizeOfPredicates, 64 NumberOfNonLiveVariables, 3096 ConjunctsInSsa, 317 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 2788/5062 InterpolantCoveringCapability, 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 RESULT: Ultimate proved your program to be correct! [2022-02-23 15:47:26,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...