/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:00:08,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:00:08,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:00:08,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:00:08,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:00:08,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:00:08,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:00:08,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:00:08,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:00:08,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:00:08,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:00:08,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:00:08,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:00:08,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:00:08,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:00:08,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:00:08,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:00:08,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:00:08,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:00:08,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:00:08,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:00:08,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:00:08,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:00:08,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:00:08,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:00:08,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 03:00:08,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 03:00:08,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 03:00:08,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 03:00:08,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 03:00:08,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 03:00:08,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 03:00:08,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 03:00:08,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:00:08,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:00:08,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:00:08,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:00:08,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:00:08,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:00:08,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:00:08,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:00:08,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:00:08,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:00:08,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:00:08,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:00:08,984 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:00:08,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:00:08,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:00:08,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:00:08,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:00:08,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:00:08,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:00:08,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:00:08,986 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:00:08,986 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:00:08,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:00:08,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:00:08,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:00:08,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:00:08,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:00:08,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:00:08,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:00:08,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:00:08,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:00:08,988 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:00:08,988 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:00:08,988 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:00:08,988 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:00:08,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:00:08,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:00:08,989 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:00:09,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:00:09,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:00:09,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:00:09,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:00:09,209 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:00:09,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c [2022-01-10 03:00:09,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a5ab1b6/64b067372d764662a065b4a9f9e2cf55/FLAG4cde86f9d [2022-01-10 03:00:09,649 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:00:09,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c [2022-01-10 03:00:09,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a5ab1b6/64b067372d764662a065b4a9f9e2cf55/FLAG4cde86f9d [2022-01-10 03:00:10,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a5ab1b6/64b067372d764662a065b4a9f9e2cf55 [2022-01-10 03:00:10,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:00:10,080 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:00:10,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:00:10,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:00:10,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:00:10,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@acd515c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10, skipping insertion in model container [2022-01-10 03:00:10,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:00:10,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:00:10,224 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c[597,610] [2022-01-10 03:00:10,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:00:10,278 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:00:10,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c[597,610] [2022-01-10 03:00:10,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:00:10,303 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:00:10,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10 WrapperNode [2022-01-10 03:00:10,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:00:10,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:00:10,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:00:10,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:00:10,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,334 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-01-10 03:00:10,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:00:10,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:00:10,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:00:10,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:00:10,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:00:10,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:00:10,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:00:10,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:00:10,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (1/1) ... [2022-01-10 03:00:10,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:00:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:00:10,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 03:00:10,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:00:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:00:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:00:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:00:10,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:00:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:00:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:00:10,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:00:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:00:10,462 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:00:10,465 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:00:10,834 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:00:10,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:00:10,838 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 03:00:10,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:00:10 BoogieIcfgContainer [2022-01-10 03:00:10,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:00:10,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:00:10,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:00:10,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:00:10,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:00:10" (1/3) ... [2022-01-10 03:00:10,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db6be14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:00:10, skipping insertion in model container [2022-01-10 03:00:10,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:00:10" (2/3) ... [2022-01-10 03:00:10,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db6be14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:00:10, skipping insertion in model container [2022-01-10 03:00:10,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:00:10" (3/3) ... [2022-01-10 03:00:10,846 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2022-01-10 03:00:10,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:00:10,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:00:10,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:00:10,893 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-01-10 03:00:10,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:00:10,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:00:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:00:10,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:00:10,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:00:10,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:00:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:00:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash 689891435, now seen corresponding path program 1 times [2022-01-10 03:00:10,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:00:10,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704186209] [2022-01-10 03:00:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:00:10,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:00:10,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:00:10,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:00:10,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:00:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:00:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:00:11,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:00:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:00:11,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:00:11,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:00:11,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704186209] [2022-01-10 03:00:11,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704186209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:00:11,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:00:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:00:11,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463192448] [2022-01-10 03:00:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:00:11,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:00:11,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:00:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:00:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:00:11,143 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:00:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:00:11,166 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-01-10 03:00:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:00:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 03:00:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:00:11,173 INFO L225 Difference]: With dead ends: 51 [2022-01-10 03:00:11,174 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 03:00:11,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:00:11,179 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:00:11,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:00:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 03:00:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 03:00:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:00:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-10 03:00:11,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2022-01-10 03:00:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:00:11,217 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-10 03:00:11,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:00:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-10 03:00:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:00:11,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:00:11,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:00:11,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:00:11,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:00:11,420 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:00:11,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:00:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 90086127, now seen corresponding path program 1 times [2022-01-10 03:00:11,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:00:11,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588116086] [2022-01-10 03:00:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:00:11,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:00:11,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:00:11,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:00:11,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:00:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:00:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:00:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:00:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:00:12,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:00:12,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:00:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588116086] [2022-01-10 03:00:12,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588116086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:00:12,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:00:12,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 03:00:12,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934414214] [2022-01-10 03:00:12,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:00:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 03:00:12,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:00:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 03:00:12,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:00:12,217 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:00:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:00:12,928 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-10 03:00:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:00:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-01-10 03:00:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:00:12,932 INFO L225 Difference]: With dead ends: 39 [2022-01-10 03:00:12,932 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:00:12,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:00:12,933 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:00:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 03:00:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:00:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-10 03:00:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:00:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-10 03:00:12,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2022-01-10 03:00:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:00:12,944 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-10 03:00:12,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:00:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-10 03:00:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:00:12,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:00:12,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:00:12,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:00:13,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:00:13,146 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:00:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:00:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1522625704, now seen corresponding path program 1 times [2022-01-10 03:00:13,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:00:13,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081132243] [2022-01-10 03:00:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:00:13,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:00:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:00:13,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:00:13,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:00:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:00:13,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:00:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:00:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:00:14,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:00:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:00:30,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:00:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081132243] [2022-01-10 03:00:30,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081132243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:00:30,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:00:30,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2022-01-10 03:00:30,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676092803] [2022-01-10 03:00:30,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:00:30,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 03:00:30,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:00:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 03:00:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:00:30,296 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:00:39,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:00:51,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:00:53,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:01:05,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:01:09,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:01:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:01:09,114 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-01-10 03:01:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 03:01:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2022-01-10 03:01:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:01:09,155 INFO L225 Difference]: With dead ends: 69 [2022-01-10 03:01:09,155 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 03:01:09,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:01:09,157 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 31 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:01:09,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 140 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 219 Invalid, 4 Unknown, 42 Unchecked, 21.6s Time] [2022-01-10 03:01:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 03:01:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2022-01-10 03:01:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 03:01:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-10 03:01:09,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 28 [2022-01-10 03:01:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:01:09,172 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-10 03:01:09,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:01:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-10 03:01:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:01:09,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:01:09,174 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:01:09,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:01:09,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:01:09,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:01:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:01:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2046310628, now seen corresponding path program 1 times [2022-01-10 03:01:09,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:01:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186422412] [2022-01-10 03:01:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:01:09,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:01:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:01:09,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:01:09,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:01:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:01:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:01:09,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:01:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:01:10,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:01:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:01:11,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:01:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186422412] [2022-01-10 03:01:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186422412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:01:11,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:01:11,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-01-10 03:01:11,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578114617] [2022-01-10 03:01:11,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:01:11,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:01:11,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:01:11,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:01:11,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:01:11,239 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 03:01:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:01:11,759 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-01-10 03:01:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:01:11,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2022-01-10 03:01:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:01:11,784 INFO L225 Difference]: With dead ends: 52 [2022-01-10 03:01:11,784 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 03:01:11,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:01:11,786 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:01:11,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 124 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-01-10 03:01:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 03:01:11,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-10 03:01:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:01:11,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-01-10 03:01:11,796 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-01-10 03:01:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:01:11,797 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-01-10 03:01:11,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 03:01:11,797 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-01-10 03:01:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 03:01:11,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:01:11,798 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:01:11,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:01:11,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:01:12,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:01:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:01:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1035193378, now seen corresponding path program 1 times [2022-01-10 03:01:12,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:01:12,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129017372] [2022-01-10 03:01:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:01:12,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:01:12,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:01:12,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:01:12,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:01:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:01:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:01:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:01:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:01:19,907 INFO L328 TraceCheckSpWp]: Computing backward predicates...