/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/combinations/gcd_3+newton_3_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:56:05,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:56:05,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:56:05,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 07:56:05,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:56:05,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:56:05,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:56:05,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:56:05,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:56:05,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:56:05,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:56:05,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:56:05,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:56:05,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:56:05,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:56:05,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:56:05,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:56:05,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:56:05,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:56:05,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:56:05,909 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 07:56:05,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:56:05,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:56:05,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:56:05,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:56:05,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:56:05,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:56:05,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:56:05,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:56:05,948 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:56:05,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:56:05,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:56:05,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:56:05,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:56:05,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:56:05,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:56:05,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:56:05,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:56:05,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:56:05,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:56:05,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:56:05,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:56:05,950 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:56:05,951 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:56:05,951 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:56:05,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:56:05,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:56:05,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:56:05,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:56:06,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:56:06,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:56:06,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:56:06,197 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:56:06,199 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:56:06,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/gcd_3+newton_3_1.i [2022-01-10 07:56:06,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/300d8a25a/a79d3c3285474b3ab294bbf6c6fe0d04/FLAG390fb5693 [2022-01-10 07:56:06,612 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:56:06,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_3+newton_3_1.i [2022-01-10 07:56:06,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/300d8a25a/a79d3c3285474b3ab294bbf6c6fe0d04/FLAG390fb5693 [2022-01-10 07:56:06,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/300d8a25a/a79d3c3285474b3ab294bbf6c6fe0d04 [2022-01-10 07:56:06,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:56:06,629 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:56:06,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:56:06,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:56:06,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:56:06,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06, skipping insertion in model container [2022-01-10 07:56:06,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:56:06,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:56:06,817 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_3+newton_3_1.i[1226,1239] [2022-01-10 07:56:06,836 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_3+newton_3_1.i[2862,2875] [2022-01-10 07:56:06,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:56:06,845 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:56:06,855 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_3+newton_3_1.i[1226,1239] [2022-01-10 07:56:06,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/gcd_3+newton_3_1.i[2862,2875] [2022-01-10 07:56:06,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:56:06,875 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:56:06,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06 WrapperNode [2022-01-10 07:56:06,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:56:06,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:56:06,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:56:06,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:56:06,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,931 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2022-01-10 07:56:06,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:56:06,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:56:06,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:56:06,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:56:06,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:56:06,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:56:06,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:56:06,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:56:06,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (1/1) ... [2022-01-10 07:56:06,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:56:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:56:07,004 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 07:56:07,016 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 07:56:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:56:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:56:07,042 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-01-10 07:56:07,042 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-01-10 07:56:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-01-10 07:56:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-01-10 07:56:07,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:56:07,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:56:07,123 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:56:07,124 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:56:07,261 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:56:07,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:56:07,267 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 07:56:07,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:56:07 BoogieIcfgContainer [2022-01-10 07:56:07,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:56:07,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:56:07,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:56:07,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:56:07,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:56:06" (1/3) ... [2022-01-10 07:56:07,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1becd1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:56:07, skipping insertion in model container [2022-01-10 07:56:07,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:56:06" (2/3) ... [2022-01-10 07:56:07,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1becd1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:56:07, skipping insertion in model container [2022-01-10 07:56:07,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:56:07" (3/3) ... [2022-01-10 07:56:07,289 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_1.i [2022-01-10 07:56:07,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:56:07,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 07:56:07,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:56:07,357 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 07:56:07,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 07:56:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 07:56:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 07:56:07,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:56:07,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:56:07,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:56:07,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:56:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-01-10 07:56:07,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:56:07,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341624516] [2022-01-10 07:56:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:56:07,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:56:07,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:56:07,395 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 07:56:07,396 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 07:56:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:56:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:56:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:56:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:56:07,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:56:07,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:56:07,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341624516] [2022-01-10 07:56:07,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341624516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:56:07,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:56:07,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:56:07,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21545756] [2022-01-10 07:56:07,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:56:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:56:07,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:56:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:56:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:56:07,586 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:56:07,622 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2022-01-10 07:56:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:56:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2022-01-10 07:56:07,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:56:07,630 INFO L225 Difference]: With dead ends: 74 [2022-01-10 07:56:07,630 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 07:56:07,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:56:07,638 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:56:07,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-01-10 07:56:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 07:56:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 07:56:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 07:56:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-10 07:56:07,677 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 11 [2022-01-10 07:56:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:56:07,677 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-10 07:56:07,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-10 07:56:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 07:56:07,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:56:07,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:56:07,687 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 07:56:07,883 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 07:56:07,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:56:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:56:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-01-10 07:56:07,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:56:07,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426970099] [2022-01-10 07:56:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:56:07,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:56:07,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:56:07,887 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 07:56:07,887 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 07:56:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:56:07,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:56:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:56:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:56:07,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:56:07,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:56:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426970099] [2022-01-10 07:56:07,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426970099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:56:07,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:56:07,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:56:07,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254956429] [2022-01-10 07:56:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:56:07,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:56:08,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:56:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:56:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:56:08,001 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:56:08,061 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-01-10 07:56:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:56:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 11 [2022-01-10 07:56:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:56:08,062 INFO L225 Difference]: With dead ends: 49 [2022-01-10 07:56:08,062 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 07:56:08,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:56:08,064 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:56:08,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:56:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 07:56:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-01-10 07:56:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 07:56:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-01-10 07:56:08,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-01-10 07:56:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:56:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-01-10 07:56:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-01-10 07:56:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 07:56:08,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:56:08,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:56:08,080 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 07:56:08,275 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 07:56:08,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:56:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:56:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash -743724587, now seen corresponding path program 1 times [2022-01-10 07:56:08,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:56:08,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857931956] [2022-01-10 07:56:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:56:08,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:56:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:56:08,278 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 07:56:08,279 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 07:56:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:56:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:56:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:56:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:56:08,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:56:08,472 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:56:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857931956] [2022-01-10 07:56:08,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857931956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:56:08,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:56:08,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 07:56:08,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765096142] [2022-01-10 07:56:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:56:08,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 07:56:08,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:56:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 07:56:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:56:08,480 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:56:08,618 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-10 07:56:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:56:08,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) Word has length 11 [2022-01-10 07:56:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:56:08,622 INFO L225 Difference]: With dead ends: 40 [2022-01-10 07:56:08,622 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 07:56:08,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-10 07:56:08,624 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:56:08,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 185 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:56:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 07:56:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-10 07:56:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 07:56:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-01-10 07:56:08,629 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-01-10 07:56:08,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:56:08,630 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-01-10 07:56:08,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-01-10 07:56:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 07:56:08,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:56:08,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:56:08,643 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 07:56:08,841 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 07:56:08,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:56:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:56:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-01-10 07:56:08,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:56:08,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563364547] [2022-01-10 07:56:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:56:08,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:56:08,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:56:08,846 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 07:56:08,847 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 07:56:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:56:08,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 07:56:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:56:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:56:10,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:56:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:56:24,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:56:24,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563364547] [2022-01-10 07:56:24,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563364547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:56:24,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:56:24,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 07:56:24,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170516963] [2022-01-10 07:56:24,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:56:24,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:56:24,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:56:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:56:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=238, Unknown=4, NotChecked=0, Total=306 [2022-01-10 07:56:24,546 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:56:24,581 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-01-10 07:56:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 07:56:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) Word has length 12 [2022-01-10 07:56:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:56:24,583 INFO L225 Difference]: With dead ends: 46 [2022-01-10 07:56:24,583 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 07:56:24,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=64, Invalid=238, Unknown=4, NotChecked=0, Total=306 [2022-01-10 07:56:24,584 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:56:24,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 291 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-01-10 07:56:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 07:56:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-01-10 07:56:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 07:56:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-10 07:56:24,590 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-01-10 07:56:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:56:24,590 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-10 07:56:24,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:56:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-10 07:56:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 07:56:24,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:56:24,591 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:56:24,600 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 07:56:24,800 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 07:56:24,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:56:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:56:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2052984139, now seen corresponding path program 1 times [2022-01-10 07:56:24,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:56:24,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490816089] [2022-01-10 07:56:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:56:24,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:56:24,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:56:24,803 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 07:56:24,807 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 07:56:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:56:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 07:56:25,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:56:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:56:37,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:57:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:57:10,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:57:10,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490816089] [2022-01-10 07:57:10,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490816089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:57:10,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:57:10,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-01-10 07:57:10,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416540108] [2022-01-10 07:57:10,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:57:10,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 07:57:10,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:57:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 07:57:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=268, Unknown=2, NotChecked=0, Total=342 [2022-01-10 07:57:10,873 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:57:12,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []