/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/loops-crafted-1/theatreSquare.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:54:15,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:54:15,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:54:15,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 02:54:15,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 02:54:15,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 02:54:15,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 02:54:15,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 02:54:15,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 02:54:15,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 02:54:15,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 02:54:15,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 02:54:15,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 02:54:15,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 02:54:15,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 02:54:15,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 02:54:15,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 02:54:15,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 02:54:15,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 02:54:15,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 02:54:15,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 02:54:15,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 02:54:15,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 02:54:15,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 02:54:15,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 02:54:15,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 02:54:15,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 02:54:15,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 02:54:15,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 02:54:15,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 02:54:15,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 02:54:15,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 02:54:15,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 02:54:15,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 02:54:15,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 02:54:15,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 02:54:15,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 02:54:15,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 02:54:15,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 02:54:15,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 02:54:15,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 02:54:15,223 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 02:54:15,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:54:15,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:54:15,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:54:15,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:54:15,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:54:15,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:54:15,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:54:15,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:54:15,267 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:54:15,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:54:15,268 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:54:15,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:54:15,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:54:15,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:54:15,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:54:15,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:54:15,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:54:15,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:54:15,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:54:15,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:54:15,270 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:54:15,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:54:15,270 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:54:15,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:54:15,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:54:15,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:54:15,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:54:15,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:54:15,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:54:15,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:54:15,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:54:15,527 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:54:15,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-01-10 02:54:15,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7316a11b9/26600f3554204b9caf2b9376cfe08f78/FLAG58fe7c606 [2022-01-10 02:54:15,936 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:54:15,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c [2022-01-10 02:54:15,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7316a11b9/26600f3554204b9caf2b9376cfe08f78/FLAG58fe7c606 [2022-01-10 02:54:16,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7316a11b9/26600f3554204b9caf2b9376cfe08f78 [2022-01-10 02:54:16,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:54:16,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:54:16,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:54:16,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:54:16,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:54:16,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ff4ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16, skipping insertion in model container [2022-01-10 02:54:16,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:54:16,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:54:16,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-01-10 02:54:16,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:54:16,648 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:54:16,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/theatreSquare.c[370,383] [2022-01-10 02:54:16,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:54:16,701 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:54:16,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16 WrapperNode [2022-01-10 02:54:16,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:54:16,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:54:16,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:54:16,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:54:16,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,743 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 94 [2022-01-10 02:54:16,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:54:16,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:54:16,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:54:16,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:54:16,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:54:16,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:54:16,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:54:16,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:54:16,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (1/1) ... [2022-01-10 02:54:16,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:54:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:54:16,818 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 02:54:16,823 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 02:54:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:54:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:54:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:54:16,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:54:16,926 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:54:16,928 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:54:17,139 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:54:17,144 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:54:17,144 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 02:54:17,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:54:17 BoogieIcfgContainer [2022-01-10 02:54:17,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:54:17,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:54:17,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:54:17,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:54:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:54:16" (1/3) ... [2022-01-10 02:54:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a94cffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:54:17, skipping insertion in model container [2022-01-10 02:54:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:54:16" (2/3) ... [2022-01-10 02:54:17,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a94cffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:54:17, skipping insertion in model container [2022-01-10 02:54:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:54:17" (3/3) ... [2022-01-10 02:54:17,168 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-01-10 02:54:17,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:54:17,172 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:54:17,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:54:17,242 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 02:54:17,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:54:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 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 02:54:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 02:54:17,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:17,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 02:54:17,263 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2022-01-10 02:54:17,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:17,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341472977] [2022-01-10 02:54:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:17,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:17,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:17,284 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 02:54:17,285 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 02:54:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:54:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:17,443 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 02:54:17,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:17,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341472977] [2022-01-10 02:54:17,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341472977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:17,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:17,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:54:17,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15827186] [2022-01-10 02:54:17,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:17,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:54:17,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:54:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:17,482 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 02:54:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:17,530 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2022-01-10 02:54:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:54:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-01-10 02:54:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:17,540 INFO L225 Difference]: With dead ends: 48 [2022-01-10 02:54:17,540 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 02:54:17,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:54:17,549 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:17,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 68 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 02:54:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 02:54:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 02:54:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-01-10 02:54:17,579 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2022-01-10 02:54:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:17,580 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-01-10 02:54:17,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 02:54:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-01-10 02:54:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 02:54:17,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:17,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:17,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:54:17,789 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 02:54:17,789 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2022-01-10 02:54:17,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:17,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004281765] [2022-01-10 02:54:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:17,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:17,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:17,793 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 02:54:17,794 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 02:54:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:54:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:17,986 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 02:54:17,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:17,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004281765] [2022-01-10 02:54:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004281765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:17,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:17,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 02:54:17,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70257134] [2022-01-10 02:54:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:17,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:54:17,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:54:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:54:17,990 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 02:54:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:18,147 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-01-10 02:54:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:54:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 18 [2022-01-10 02:54:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:18,151 INFO L225 Difference]: With dead ends: 39 [2022-01-10 02:54:18,151 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 02:54:18,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:54:18,153 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:18,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 02:54:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-01-10 02:54:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 02:54:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-01-10 02:54:18,159 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2022-01-10 02:54:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-01-10 02:54:18,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 02:54:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-01-10 02:54:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:54:18,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:18,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:18,174 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 02:54:18,370 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 02:54:18,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2022-01-10 02:54:18,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:18,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091226938] [2022-01-10 02:54:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:18,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:18,373 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 02:54:18,375 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 02:54:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:18,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:54:18,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:54:18,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:18,461 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:18,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091226938] [2022-01-10 02:54:18,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091226938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:18,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:18,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:54:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732161284] [2022-01-10 02:54:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:18,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:54:18,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:54:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:18,463 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:54:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:18,475 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-01-10 02:54:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:54:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2022-01-10 02:54:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:18,476 INFO L225 Difference]: With dead ends: 47 [2022-01-10 02:54:18,476 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 02:54:18,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:18,478 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:18,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 02:54:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-01-10 02:54:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 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 02:54:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-01-10 02:54:18,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2022-01-10 02:54:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:18,483 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-01-10 02:54:18,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:54:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-01-10 02:54:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:54:18,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:18,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:18,495 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 02:54:18,692 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 02:54:18,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2022-01-10 02:54:18,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:18,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110097942] [2022-01-10 02:54:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:18,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:18,695 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 02:54:18,696 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 02:54:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:54:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:54:18,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:18,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110097942] [2022-01-10 02:54:18,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110097942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:18,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:18,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:54:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592537272] [2022-01-10 02:54:18,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:18,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:54:18,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:54:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:18,783 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:54:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:18,796 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-01-10 02:54:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:54:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2022-01-10 02:54:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:18,798 INFO L225 Difference]: With dead ends: 66 [2022-01-10 02:54:18,798 INFO L226 Difference]: Without dead ends: 49 [2022-01-10 02:54:18,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:18,799 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:18,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-10 02:54:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2022-01-10 02:54:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 02:54:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-01-10 02:54:18,805 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2022-01-10 02:54:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:18,805 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-01-10 02:54:18,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 02:54:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-01-10 02:54:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:54:18,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:18,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:18,819 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 02:54:19,014 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 02:54:19,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2022-01-10 02:54:19,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797188124] [2022-01-10 02:54:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:19,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:19,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:19,018 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 02:54:19,020 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 02:54:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:54:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:54:19,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:54:19,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797188124] [2022-01-10 02:54:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797188124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:19,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:19,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-10 02:54:19,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157018036] [2022-01-10 02:54:19,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:19,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:54:19,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:54:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:54:19,343 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 02:54:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:19,576 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-01-10 02:54:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 02:54:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 20 [2022-01-10 02:54:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:19,577 INFO L225 Difference]: With dead ends: 52 [2022-01-10 02:54:19,577 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 02:54:19,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:54:19,578 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:19,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 187 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 02:54:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-01-10 02:54:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 02:54:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-01-10 02:54:19,583 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-01-10 02:54:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:19,584 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-01-10 02:54:19,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 02:54:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-01-10 02:54:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:54:19,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:19,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:19,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:19,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:19,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1312537087, now seen corresponding path program 1 times [2022-01-10 02:54:19,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:19,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043072243] [2022-01-10 02:54:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:19,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:19,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:19,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:19,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 02:54:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:54:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:54:19,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:54:20,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043072243] [2022-01-10 02:54:20,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043072243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:20,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:20,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-01-10 02:54:20,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84494040] [2022-01-10 02:54:20,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:20,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:54:20,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:54:20,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:54:20,078 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 02:54:20,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:20,369 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-01-10 02:54:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 02:54:20,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 20 [2022-01-10 02:54:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:20,371 INFO L225 Difference]: With dead ends: 81 [2022-01-10 02:54:20,371 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 02:54:20,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:54:20,372 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:20,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 177 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 02:54:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2022-01-10 02:54:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 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 02:54:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-01-10 02:54:20,379 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 20 [2022-01-10 02:54:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:20,379 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-01-10 02:54:20,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 02:54:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-01-10 02:54:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 02:54:20,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:20,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:20,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:20,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:20,590 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:20,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1332598087, now seen corresponding path program 1 times [2022-01-10 02:54:20,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984019672] [2022-01-10 02:54:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:20,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:20,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:20,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 02:54:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:20,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:54:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:54:20,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:20,707 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:20,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984019672] [2022-01-10 02:54:20,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984019672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:20,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:20,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:54:20,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274191731] [2022-01-10 02:54:20,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:20,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:54:20,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:20,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:54:20,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:54:20,709 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 02:54:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:20,718 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-01-10 02:54:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:54:20,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 21 [2022-01-10 02:54:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:20,725 INFO L225 Difference]: With dead ends: 62 [2022-01-10 02:54:20,725 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 02:54:20,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 02:54:20,727 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:20,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 02:54:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-10 02:54:20,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 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 02:54:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-01-10 02:54:20,741 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 21 [2022-01-10 02:54:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:20,741 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-01-10 02:54:20,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 02:54:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-01-10 02:54:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 02:54:20,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:20,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:20,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:20,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:20,943 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:20,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2022-01-10 02:54:20,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792214335] [2022-01-10 02:54:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:20,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:20,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:20,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 02:54:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:20,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:54:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:54:21,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:21,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792214335] [2022-01-10 02:54:21,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792214335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:21,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:21,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:54:21,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059284666] [2022-01-10 02:54:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:21,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:54:21,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:54:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:21,121 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 02:54:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:21,152 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-01-10 02:54:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:54:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2022-01-10 02:54:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:21,154 INFO L225 Difference]: With dead ends: 50 [2022-01-10 02:54:21,154 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 02:54:21,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:54:21,157 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:21,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 02:54:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-10 02:54:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 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 02:54:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-10 02:54:21,169 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 21 [2022-01-10 02:54:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:21,170 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-10 02:54:21,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 02:54:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-10 02:54:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:54:21,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:21,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:21,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:21,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:21,372 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2118273506, now seen corresponding path program 1 times [2022-01-10 02:54:21,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:21,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069517406] [2022-01-10 02:54:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:21,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:21,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:21,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 02:54:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:21,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:54:21,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:21,484 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 02:54:21,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:21,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069517406] [2022-01-10 02:54:21,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069517406] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:21,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:21,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:54:21,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002257091] [2022-01-10 02:54:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:21,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:54:21,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:54:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:54:21,487 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 02:54:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:21,493 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-10 02:54:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:54:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 22 [2022-01-10 02:54:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:21,494 INFO L225 Difference]: With dead ends: 55 [2022-01-10 02:54:21,495 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 02:54:21,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 02:54:21,495 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:21,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 02:54:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 02:54:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 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 02:54:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-01-10 02:54:21,500 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 22 [2022-01-10 02:54:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:21,500 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-01-10 02:54:21,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 02:54:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-01-10 02:54:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:54:21,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:21,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:21,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:21,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:21,710 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash 336844510, now seen corresponding path program 1 times [2022-01-10 02:54:21,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:21,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539026917] [2022-01-10 02:54:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:21,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:21,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:21,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:21,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 02:54:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:54:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:21,836 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 02:54:21,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:21,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539026917] [2022-01-10 02:54:21,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539026917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:21,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:54:21,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844371696] [2022-01-10 02:54:21,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:21,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:54:21,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:54:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:54:21,838 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 02:54:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:21,860 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-10 02:54:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:54:21,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2022-01-10 02:54:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:21,861 INFO L225 Difference]: With dead ends: 42 [2022-01-10 02:54:21,861 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 02:54:21,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:54:21,862 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:21,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 02:54:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 02:54:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 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 02:54:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-01-10 02:54:21,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 22 [2022-01-10 02:54:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:21,866 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-01-10 02:54:21,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 02:54:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-01-10 02:54:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 02:54:21,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:21,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:21,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:22,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:22,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:22,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2020008296, now seen corresponding path program 1 times [2022-01-10 02:54:22,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:22,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996016247] [2022-01-10 02:54:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:22,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:22,077 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:22,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 02:54:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:54:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:22,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:22,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996016247] [2022-01-10 02:54:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996016247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:22,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:22,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:54:22,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463649328] [2022-01-10 02:54:22,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:22,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:54:22,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:54:22,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:54:22,240 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 02:54:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:22,325 INFO L93 Difference]: Finished difference Result 107 states and 135 transitions. [2022-01-10 02:54:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:54:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 23 [2022-01-10 02:54:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:22,327 INFO L225 Difference]: With dead ends: 107 [2022-01-10 02:54:22,327 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 02:54:22,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:54:22,327 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:22,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 02:54:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 39. [2022-01-10 02:54:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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 02:54:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-01-10 02:54:22,334 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2022-01-10 02:54:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:22,334 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-01-10 02:54:22,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 02:54:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-01-10 02:54:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 02:54:22,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:22,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:22,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:22,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:22,546 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2022-01-10 02:54:22,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:22,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484724594] [2022-01-10 02:54:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:22,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:22,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:22,548 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:22,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 02:54:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:54:22,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:22,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:22,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484724594] [2022-01-10 02:54:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484724594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:22,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:22,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:54:22,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122418755] [2022-01-10 02:54:22,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:22,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:54:22,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:54:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:54:22,693 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 02:54:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:22,767 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2022-01-10 02:54:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:54:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 23 [2022-01-10 02:54:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:22,768 INFO L225 Difference]: With dead ends: 96 [2022-01-10 02:54:22,768 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 02:54:22,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:54:22,769 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:22,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 98 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 02:54:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 42. [2022-01-10 02:54:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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 02:54:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-01-10 02:54:22,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 23 [2022-01-10 02:54:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:22,776 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-01-10 02:54:22,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 02:54:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-01-10 02:54:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:54:22,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:22,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:22,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:22,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:22,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2022-01-10 02:54:22,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769152315] [2022-01-10 02:54:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:22,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:22,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:22,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 02:54:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:23,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:54:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:54:23,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:54:23,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769152315] [2022-01-10 02:54:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769152315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:23,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:23,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-01-10 02:54:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659053235] [2022-01-10 02:54:23,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:23,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:54:23,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:54:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:54:23,468 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 02:54:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:23,944 INFO L93 Difference]: Finished difference Result 133 states and 169 transitions. [2022-01-10 02:54:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 02:54:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 24 [2022-01-10 02:54:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:23,946 INFO L225 Difference]: With dead ends: 133 [2022-01-10 02:54:23,947 INFO L226 Difference]: Without dead ends: 127 [2022-01-10 02:54:23,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 02:54:23,948 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 160 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:23,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 375 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:54:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-10 02:54:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 64. [2022-01-10 02:54:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 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 02:54:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2022-01-10 02:54:23,958 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 24 [2022-01-10 02:54:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:23,958 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2022-01-10 02:54:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 02:54:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2022-01-10 02:54:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:54:23,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:23,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:23,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:24,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:24,169 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2022-01-10 02:54:24,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:24,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584158685] [2022-01-10 02:54:24,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:54:24,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:24,170 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:24,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 02:54:24,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:24,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:24,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:54:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:24,476 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 02:54:24,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:24,639 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 02:54:24,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:24,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584158685] [2022-01-10 02:54:24,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584158685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:24,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:24,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:54:24,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053742415] [2022-01-10 02:54:24,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:24,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:54:24,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:54:24,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:54:24,641 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 02:54:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:24,874 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-01-10 02:54:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:54:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 25 [2022-01-10 02:54:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:24,877 INFO L225 Difference]: With dead ends: 102 [2022-01-10 02:54:24,877 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 02:54:24,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:54:24,878 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:24,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 118 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 02:54:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2022-01-10 02:54:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 79 states have internal predecessors, (110), 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 02:54:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2022-01-10 02:54:24,895 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 25 [2022-01-10 02:54:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:24,897 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2022-01-10 02:54:24,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 02:54:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2022-01-10 02:54:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:54:24,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:24,902 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:24,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:25,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:25,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2022-01-10 02:54:25,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477007177] [2022-01-10 02:54:25,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:54:25,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:25,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:25,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 02:54:25,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:54:25,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:54:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:25,241 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 02:54:25,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:25,340 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 02:54:25,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477007177] [2022-01-10 02:54:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477007177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:25,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:25,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 02:54:25,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594276013] [2022-01-10 02:54:25,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:25,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:54:25,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:54:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:54:25,341 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 02:54:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:25,393 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2022-01-10 02:54:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:54:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 25 [2022-01-10 02:54:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:25,394 INFO L225 Difference]: With dead ends: 107 [2022-01-10 02:54:25,394 INFO L226 Difference]: Without dead ends: 95 [2022-01-10 02:54:25,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:54:25,395 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:25,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-10 02:54:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2022-01-10 02:54:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.375) internal successors, (121), 88 states have internal predecessors, (121), 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 02:54:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-01-10 02:54:25,409 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 25 [2022-01-10 02:54:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:25,409 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-01-10 02:54:25,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 02:54:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-01-10 02:54:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:54:25,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:25,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:25,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:25,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:25,619 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2022-01-10 02:54:25,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:25,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53954573] [2022-01-10 02:54:25,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:54:25,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:25,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:25,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 02:54:25,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:54:25,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:54:25,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:25,730 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 02:54:25,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:25,815 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 02:54:25,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53954573] [2022-01-10 02:54:25,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53954573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:25,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:25,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 02:54:25,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25150326] [2022-01-10 02:54:25,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:25,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:54:25,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:54:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:54:25,817 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 02:54:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:25,877 INFO L93 Difference]: Finished difference Result 180 states and 240 transitions. [2022-01-10 02:54:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:54:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 25 [2022-01-10 02:54:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:25,878 INFO L225 Difference]: With dead ends: 180 [2022-01-10 02:54:25,879 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 02:54:25,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:54:25,879 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:25,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 140 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 02:54:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2022-01-10 02:54:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 97 states have internal predecessors, (132), 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 02:54:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2022-01-10 02:54:25,895 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 25 [2022-01-10 02:54:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:25,895 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2022-01-10 02:54:25,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 02:54:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2022-01-10 02:54:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:54:25,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:25,896 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:25,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:26,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:26,105 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2022-01-10 02:54:26,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:26,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201769341] [2022-01-10 02:54:26,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:54:26,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:26,107 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:26,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 02:54:26,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:26,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:54:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:26,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:26,665 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 02:54:26,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:26,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201769341] [2022-01-10 02:54:26,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201769341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:26,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:26,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:54:26,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257300344] [2022-01-10 02:54:26,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:26,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:54:26,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:26,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:54:26,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:54:26,667 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 02:54:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:26,914 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-01-10 02:54:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:54:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 25 [2022-01-10 02:54:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:26,915 INFO L225 Difference]: With dead ends: 127 [2022-01-10 02:54:26,915 INFO L226 Difference]: Without dead ends: 114 [2022-01-10 02:54:26,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-10 02:54:26,916 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:26,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 178 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-10 02:54:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2022-01-10 02:54:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.35) internal successors, (135), 100 states have internal predecessors, (135), 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 02:54:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2022-01-10 02:54:26,932 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 25 [2022-01-10 02:54:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:26,932 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2022-01-10 02:54:26,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 02:54:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2022-01-10 02:54:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 02:54:26,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:26,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:26,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:27,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:27,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2022-01-10 02:54:27,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:27,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498718385] [2022-01-10 02:54:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:54:27,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:27,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:27,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 02:54:27,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-10 02:54:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:54:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:54:27,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:54:27,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:27,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498718385] [2022-01-10 02:54:27,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498718385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:27,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:54:27,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312268373] [2022-01-10 02:54:27,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:27,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:54:27,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:54:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:54:27,555 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 02:54:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:27,751 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2022-01-10 02:54:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:54:27,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 26 [2022-01-10 02:54:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:27,753 INFO L225 Difference]: With dead ends: 151 [2022-01-10 02:54:27,753 INFO L226 Difference]: Without dead ends: 114 [2022-01-10 02:54:27,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:54:27,754 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:27,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 124 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-10 02:54:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2022-01-10 02:54:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 101 states have internal predecessors, (135), 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 02:54:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2022-01-10 02:54:27,768 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 26 [2022-01-10 02:54:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:27,769 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2022-01-10 02:54:27,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 02:54:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2022-01-10 02:54:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 02:54:27,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:27,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:27,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:27,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:27,979 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2022-01-10 02:54:27,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487543222] [2022-01-10 02:54:27,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:54:27,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:27,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:27,981 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:27,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 02:54:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:54:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:54:28,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:54:28,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487543222] [2022-01-10 02:54:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487543222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:28,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:28,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2022-01-10 02:54:28,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242579130] [2022-01-10 02:54:28,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:28,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 02:54:28,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 02:54:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-01-10 02:54:28,460 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 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 02:54:29,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:29,142 INFO L93 Difference]: Finished difference Result 242 states and 302 transitions. [2022-01-10 02:54:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:54:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 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 26 [2022-01-10 02:54:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:29,143 INFO L225 Difference]: With dead ends: 242 [2022-01-10 02:54:29,143 INFO L226 Difference]: Without dead ends: 233 [2022-01-10 02:54:29,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:54:29,145 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 178 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:29,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 734 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:54:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-10 02:54:29,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 131. [2022-01-10 02:54:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3461538461538463) internal successors, (175), 130 states have internal predecessors, (175), 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 02:54:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2022-01-10 02:54:29,165 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 26 [2022-01-10 02:54:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:29,165 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2022-01-10 02:54:29,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 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 02:54:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2022-01-10 02:54:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 02:54:29,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:29,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:29,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:29,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:29,374 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2022-01-10 02:54:29,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:29,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150542442] [2022-01-10 02:54:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:54:29,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:29,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:29,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 02:54:29,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:54:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:54:29,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:54:29,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:29,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150542442] [2022-01-10 02:54:29,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150542442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:29,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:29,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:54:29,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264855835] [2022-01-10 02:54:29,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:29,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:54:29,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:54:29,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:54:29,727 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 02:54:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:29,950 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2022-01-10 02:54:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:54:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 26 [2022-01-10 02:54:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:29,952 INFO L225 Difference]: With dead ends: 150 [2022-01-10 02:54:29,952 INFO L226 Difference]: Without dead ends: 135 [2022-01-10 02:54:29,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:54:29,953 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 98 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:29,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 192 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-10 02:54:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2022-01-10 02:54:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.3125) internal successors, (168), 128 states have internal predecessors, (168), 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 02:54:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2022-01-10 02:54:29,972 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 26 [2022-01-10 02:54:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:29,972 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2022-01-10 02:54:29,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 02:54:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2022-01-10 02:54:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:54:29,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:29,973 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:29,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:30,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:30,173 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2022-01-10 02:54:30,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:30,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51206563] [2022-01-10 02:54:30,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:54:30,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:30,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:30,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 02:54:30,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:54:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 02:54:30,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:30,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:30,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51206563] [2022-01-10 02:54:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51206563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:30,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:30,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:54:30,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380150055] [2022-01-10 02:54:30,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:54:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:54:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:54:30,985 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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 02:54:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:31,604 INFO L93 Difference]: Finished difference Result 190 states and 240 transitions. [2022-01-10 02:54:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:54:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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 27 [2022-01-10 02:54:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:31,605 INFO L225 Difference]: With dead ends: 190 [2022-01-10 02:54:31,605 INFO L226 Difference]: Without dead ends: 164 [2022-01-10 02:54:31,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:54:31,606 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 144 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:31,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 336 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 128 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-10 02:54:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-10 02:54:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2022-01-10 02:54:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 131 states have internal predecessors, (173), 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 02:54:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 173 transitions. [2022-01-10 02:54:31,632 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 173 transitions. Word has length 27 [2022-01-10 02:54:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:31,632 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 173 transitions. [2022-01-10 02:54:31,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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 02:54:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 173 transitions. [2022-01-10 02:54:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:54:31,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:31,633 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:31,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 02:54:31,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:31,841 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:31,842 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2022-01-10 02:54:31,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507281829] [2022-01-10 02:54:31,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:54:31,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:31,844 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:31,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 02:54:31,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:54:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:31,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 02:54:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:32,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:32,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507281829] [2022-01-10 02:54:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507281829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:32,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:32,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 02:54:32,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325502303] [2022-01-10 02:54:32,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:32,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:54:32,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:54:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:54:32,906 INFO L87 Difference]: Start difference. First operand 132 states and 173 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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 02:54:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:33,857 INFO L93 Difference]: Finished difference Result 232 states and 292 transitions. [2022-01-10 02:54:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 02:54:33,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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 27 [2022-01-10 02:54:33,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:33,860 INFO L225 Difference]: With dead ends: 232 [2022-01-10 02:54:33,860 INFO L226 Difference]: Without dead ends: 219 [2022-01-10 02:54:33,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:54:33,861 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 187 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:33,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 576 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 204 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-01-10 02:54:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-10 02:54:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 135. [2022-01-10 02:54:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3134328358208955) internal successors, (176), 134 states have internal predecessors, (176), 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 02:54:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2022-01-10 02:54:33,890 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 27 [2022-01-10 02:54:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:33,890 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2022-01-10 02:54:33,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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 02:54:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2022-01-10 02:54:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:54:33,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:33,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:33,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:34,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:34,100 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2022-01-10 02:54:34,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322822895] [2022-01-10 02:54:34,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:54:34,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:34,102 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:34,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 02:54:34,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:34,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:34,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:54:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:54:34,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:54:34,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322822895] [2022-01-10 02:54:34,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322822895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:34,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:54:34,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470542965] [2022-01-10 02:54:34,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:34,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:54:34,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:54:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:54:34,306 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 02:54:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:34,611 INFO L93 Difference]: Finished difference Result 444 states and 584 transitions. [2022-01-10 02:54:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 02:54:34,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 27 [2022-01-10 02:54:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:34,613 INFO L225 Difference]: With dead ends: 444 [2022-01-10 02:54:34,613 INFO L226 Difference]: Without dead ends: 377 [2022-01-10 02:54:34,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-01-10 02:54:34,614 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 170 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:34,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 351 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-10 02:54:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 140. [2022-01-10 02:54:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.316546762589928) internal successors, (183), 139 states have internal predecessors, (183), 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 02:54:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2022-01-10 02:54:34,648 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 27 [2022-01-10 02:54:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2022-01-10 02:54:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 02:54:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2022-01-10 02:54:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:54:34,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:34,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:34,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 02:54:34,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:34,851 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2022-01-10 02:54:34,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:34,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148503624] [2022-01-10 02:54:34,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:54:34,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:34,853 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:34,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 02:54:34,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-10 02:54:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:54:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:54:34,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:54:35,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148503624] [2022-01-10 02:54:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148503624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:35,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:35,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:54:35,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722162752] [2022-01-10 02:54:35,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:35,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:54:35,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:54:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:54:35,064 INFO L87 Difference]: Start difference. First operand 140 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 02:54:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:35,443 INFO L93 Difference]: Finished difference Result 281 states and 360 transitions. [2022-01-10 02:54:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:54:35,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 27 [2022-01-10 02:54:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:35,445 INFO L225 Difference]: With dead ends: 281 [2022-01-10 02:54:35,445 INFO L226 Difference]: Without dead ends: 275 [2022-01-10 02:54:35,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:54:35,446 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 123 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:35,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 206 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-10 02:54:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 176. [2022-01-10 02:54:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.3714285714285714) internal successors, (240), 175 states have internal predecessors, (240), 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 02:54:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 240 transitions. [2022-01-10 02:54:35,486 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 240 transitions. Word has length 27 [2022-01-10 02:54:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:35,486 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 240 transitions. [2022-01-10 02:54:35,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 02:54:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 240 transitions. [2022-01-10 02:54:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:54:35,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:35,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:35,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:35,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:35,697 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2022-01-10 02:54:35,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622137063] [2022-01-10 02:54:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:54:35,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:35,698 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:35,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 02:54:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:35,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 02:54:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:54:35,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:54:36,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:36,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622137063] [2022-01-10 02:54:36,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622137063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:36,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:36,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2022-01-10 02:54:36,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222378393] [2022-01-10 02:54:36,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:36,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 02:54:36,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 02:54:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:54:36,256 INFO L87 Difference]: Start difference. First operand 176 states and 240 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 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 02:54:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:37,136 INFO L93 Difference]: Finished difference Result 402 states and 511 transitions. [2022-01-10 02:54:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 02:54:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 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 28 [2022-01-10 02:54:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:37,139 INFO L225 Difference]: With dead ends: 402 [2022-01-10 02:54:37,139 INFO L226 Difference]: Without dead ends: 393 [2022-01-10 02:54:37,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 02:54:37,140 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 178 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:37,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1128 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:54:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-10 02:54:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 202. [2022-01-10 02:54:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.373134328358209) internal successors, (276), 201 states have internal predecessors, (276), 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 02:54:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 276 transitions. [2022-01-10 02:54:37,211 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 276 transitions. Word has length 28 [2022-01-10 02:54:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:37,211 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 276 transitions. [2022-01-10 02:54:37,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 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 02:54:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 276 transitions. [2022-01-10 02:54:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:54:37,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:37,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:37,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:37,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:37,422 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2022-01-10 02:54:37,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:37,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036044814] [2022-01-10 02:54:37,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:54:37,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:37,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:37,424 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:37,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 02:54:37,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:37,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:54:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:54:37,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:54:37,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036044814] [2022-01-10 02:54:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036044814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:37,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:37,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2022-01-10 02:54:37,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253005671] [2022-01-10 02:54:37,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:37,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 02:54:37,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 02:54:37,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:54:37,995 INFO L87 Difference]: Start difference. First operand 202 states and 276 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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 02:54:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:38,671 INFO L93 Difference]: Finished difference Result 325 states and 410 transitions. [2022-01-10 02:54:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 02:54:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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 28 [2022-01-10 02:54:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:38,673 INFO L225 Difference]: With dead ends: 325 [2022-01-10 02:54:38,673 INFO L226 Difference]: Without dead ends: 319 [2022-01-10 02:54:38,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=1501, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 02:54:38,674 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 225 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:38,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 865 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:54:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-10 02:54:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 228. [2022-01-10 02:54:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3656387665198237) internal successors, (310), 227 states have internal predecessors, (310), 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 02:54:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 310 transitions. [2022-01-10 02:54:38,732 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 310 transitions. Word has length 28 [2022-01-10 02:54:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:38,733 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 310 transitions. [2022-01-10 02:54:38,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 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 02:54:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 310 transitions. [2022-01-10 02:54:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:54:38,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:38,733 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:38,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 02:54:38,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:38,934 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash 705400304, now seen corresponding path program 2 times [2022-01-10 02:54:38,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:38,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327467273] [2022-01-10 02:54:38,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:54:38,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:38,936 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:38,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 02:54:38,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:54:38,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:54:39,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:54:39,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327467273] [2022-01-10 02:54:39,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327467273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:39,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:39,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:54:39,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740040457] [2022-01-10 02:54:39,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:39,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:54:39,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:54:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:54:39,156 INFO L87 Difference]: Start difference. First operand 228 states and 310 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 02:54:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:39,670 INFO L93 Difference]: Finished difference Result 519 states and 678 transitions. [2022-01-10 02:54:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 02:54:39,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 28 [2022-01-10 02:54:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:39,673 INFO L225 Difference]: With dead ends: 519 [2022-01-10 02:54:39,673 INFO L226 Difference]: Without dead ends: 513 [2022-01-10 02:54:39,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2022-01-10 02:54:39,674 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 260 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:39,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 346 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-10 02:54:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 259. [2022-01-10 02:54:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.441860465116279) internal successors, (372), 258 states have internal predecessors, (372), 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 02:54:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 372 transitions. [2022-01-10 02:54:39,765 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 372 transitions. Word has length 28 [2022-01-10 02:54:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:39,765 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 372 transitions. [2022-01-10 02:54:39,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 02:54:39,765 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 372 transitions. [2022-01-10 02:54:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:54:39,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:39,766 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:39,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:39,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:39,975 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2022-01-10 02:54:39,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331435974] [2022-01-10 02:54:39,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:54:39,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:39,977 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:39,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 02:54:40,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:54:40,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 02:54:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:42,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:43,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331435974] [2022-01-10 02:54:43,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331435974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:43,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:43,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-01-10 02:54:43,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447971935] [2022-01-10 02:54:43,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:43,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 02:54:43,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 02:54:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-10 02:54:43,443 INFO L87 Difference]: Start difference. First operand 259 states and 372 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 02:54:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:50,815 INFO L93 Difference]: Finished difference Result 482 states and 665 transitions. [2022-01-10 02:54:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 02:54:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 29 [2022-01-10 02:54:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:50,819 INFO L225 Difference]: With dead ends: 482 [2022-01-10 02:54:50,819 INFO L226 Difference]: Without dead ends: 447 [2022-01-10 02:54:50,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 02:54:50,820 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 223 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:50,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 544 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:54:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-10 02:54:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 339. [2022-01-10 02:54:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.4644970414201184) internal successors, (495), 338 states have internal predecessors, (495), 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 02:54:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 495 transitions. [2022-01-10 02:54:50,931 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 495 transitions. Word has length 29 [2022-01-10 02:54:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:50,931 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 495 transitions. [2022-01-10 02:54:50,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 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 02:54:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 495 transitions. [2022-01-10 02:54:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:54:50,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:50,932 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:50,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 02:54:51,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:51,132 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:51,133 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2022-01-10 02:54:51,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163690156] [2022-01-10 02:54:51,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:54:51,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:51,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:51,134 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:51,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 02:54:51,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:54:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 02:54:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:52,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:54:54,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163690156] [2022-01-10 02:54:54,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163690156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:54,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:54,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-10 02:54:54,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528300829] [2022-01-10 02:54:54,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:54,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:54:54,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:54,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:54:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:54:54,422 INFO L87 Difference]: Start difference. First operand 339 states and 495 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 02:55:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:01,249 INFO L93 Difference]: Finished difference Result 508 states and 704 transitions. [2022-01-10 02:55:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 02:55:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 29 [2022-01-10 02:55:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:01,252 INFO L225 Difference]: With dead ends: 508 [2022-01-10 02:55:01,252 INFO L226 Difference]: Without dead ends: 489 [2022-01-10 02:55:01,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:55:01,253 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 398 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:01,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 514 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 277 Invalid, 0 Unknown, 33 Unchecked, 1.1s Time] [2022-01-10 02:55:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-10 02:55:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 389. [2022-01-10 02:55:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.4458762886597938) internal successors, (561), 388 states have internal predecessors, (561), 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 02:55:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 561 transitions. [2022-01-10 02:55:01,414 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 561 transitions. Word has length 29 [2022-01-10 02:55:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:01,414 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 561 transitions. [2022-01-10 02:55:01,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 02:55:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 561 transitions. [2022-01-10 02:55:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:55:01,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:01,415 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:01,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:01,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:01,624 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 17 times [2022-01-10 02:55:01,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936748750] [2022-01-10 02:55:01,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:55:01,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:01,626 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:01,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 02:55:01,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-10 02:55:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:55:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:55:01,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:55:01,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:01,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936748750] [2022-01-10 02:55:01,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936748750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:01,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:01,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:55:01,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56255409] [2022-01-10 02:55:01,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:01,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:55:01,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:55:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:55:01,852 INFO L87 Difference]: Start difference. First operand 389 states and 561 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 02:55:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:02,129 INFO L93 Difference]: Finished difference Result 756 states and 1073 transitions. [2022-01-10 02:55:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 02:55:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 29 [2022-01-10 02:55:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:02,132 INFO L225 Difference]: With dead ends: 756 [2022-01-10 02:55:02,132 INFO L226 Difference]: Without dead ends: 596 [2022-01-10 02:55:02,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:55:02,134 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 111 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:02,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 286 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:55:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-10 02:55:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 421. [2022-01-10 02:55:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.4285714285714286) internal successors, (600), 420 states have internal predecessors, (600), 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 02:55:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 600 transitions. [2022-01-10 02:55:02,279 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 600 transitions. Word has length 29 [2022-01-10 02:55:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:02,279 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 600 transitions. [2022-01-10 02:55:02,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 02:55:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 600 transitions. [2022-01-10 02:55:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:55:02,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:02,280 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:02,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 02:55:02,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:02,481 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:02,481 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 18 times [2022-01-10 02:55:02,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:02,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348300524] [2022-01-10 02:55:02,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:55:02,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:02,482 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:02,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 02:55:02,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 02:55:02,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 02:55:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:55:02,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:55:03,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348300524] [2022-01-10 02:55:03,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348300524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:03,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:03,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2022-01-10 02:55:03,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963292969] [2022-01-10 02:55:03,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:03,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 02:55:03,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:03,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 02:55:03,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2022-01-10 02:55:03,149 INFO L87 Difference]: Start difference. First operand 421 states and 600 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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 02:55:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:04,372 INFO L93 Difference]: Finished difference Result 666 states and 881 transitions. [2022-01-10 02:55:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 02:55:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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 30 [2022-01-10 02:55:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:04,375 INFO L225 Difference]: With dead ends: 666 [2022-01-10 02:55:04,375 INFO L226 Difference]: Without dead ends: 657 [2022-01-10 02:55:04,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 02:55:04,376 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 208 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:04,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1720 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:55:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-10 02:55:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 442. [2022-01-10 02:55:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.433106575963719) internal successors, (632), 441 states have internal predecessors, (632), 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 02:55:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 632 transitions. [2022-01-10 02:55:04,540 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 632 transitions. Word has length 30 [2022-01-10 02:55:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:04,541 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 632 transitions. [2022-01-10 02:55:04,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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 02:55:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 632 transitions. [2022-01-10 02:55:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:55:04,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:04,542 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:04,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:04,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:04,748 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1851447504, now seen corresponding path program 19 times [2022-01-10 02:55:04,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959697542] [2022-01-10 02:55:04,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:55:04,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:04,749 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:04,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 02:55:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:55:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:55:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:55:04,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:55:04,966 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:04,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959697542] [2022-01-10 02:55:04,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959697542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:04,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:04,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:55:04,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893459362] [2022-01-10 02:55:04,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:04,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:55:04,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:55:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:55:04,967 INFO L87 Difference]: Start difference. First operand 442 states and 632 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 02:55:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:05,184 INFO L93 Difference]: Finished difference Result 466 states and 655 transitions. [2022-01-10 02:55:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 02:55:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 30 [2022-01-10 02:55:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:05,187 INFO L225 Difference]: With dead ends: 466 [2022-01-10 02:55:05,187 INFO L226 Difference]: Without dead ends: 452 [2022-01-10 02:55:05,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:55:05,188 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 46 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:05,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 265 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:55:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-10 02:55:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2022-01-10 02:55:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.434782608695652) internal successors, (627), 437 states have internal predecessors, (627), 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 02:55:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 627 transitions. [2022-01-10 02:55:05,319 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 627 transitions. Word has length 30 [2022-01-10 02:55:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:05,320 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 627 transitions. [2022-01-10 02:55:05,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 02:55:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 627 transitions. [2022-01-10 02:55:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:55:05,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:05,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:05,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:05,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:05,530 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2022-01-10 02:55:05,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:05,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355653672] [2022-01-10 02:55:05,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:55:05,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:05,532 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:05,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 02:55:05,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:55:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:55:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:55:05,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:55:06,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:06,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355653672] [2022-01-10 02:55:06,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355653672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:06,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:06,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:55:06,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645808709] [2022-01-10 02:55:06,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:06,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:55:06,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:55:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:55:06,184 INFO L87 Difference]: Start difference. First operand 438 states and 627 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 02:55:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:06,756 INFO L93 Difference]: Finished difference Result 594 states and 843 transitions. [2022-01-10 02:55:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 02:55:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 30 [2022-01-10 02:55:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:06,758 INFO L225 Difference]: With dead ends: 594 [2022-01-10 02:55:06,759 INFO L226 Difference]: Without dead ends: 467 [2022-01-10 02:55:06,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:55:06,759 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 144 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:06,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 244 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 98 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-01-10 02:55:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-10 02:55:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 459. [2022-01-10 02:55:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.4126637554585153) internal successors, (647), 458 states have internal predecessors, (647), 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 02:55:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 647 transitions. [2022-01-10 02:55:06,893 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 647 transitions. Word has length 30 [2022-01-10 02:55:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:06,893 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 647 transitions. [2022-01-10 02:55:06,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 02:55:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 647 transitions. [2022-01-10 02:55:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:55:06,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:06,894 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, 1, 1] [2022-01-10 02:55:06,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:07,095 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2022-01-10 02:55:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109651306] [2022-01-10 02:55:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:55:07,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:07,096 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:07,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 02:55:07,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:55:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:55:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:55:07,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:55:07,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:07,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109651306] [2022-01-10 02:55:07,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109651306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:07,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:07,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2022-01-10 02:55:07,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760334100] [2022-01-10 02:55:07,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:07,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 02:55:07,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 02:55:07,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:55:07,848 INFO L87 Difference]: Start difference. First operand 459 states and 647 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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 02:55:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:08,938 INFO L93 Difference]: Finished difference Result 628 states and 828 transitions. [2022-01-10 02:55:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 02:55:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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 30 [2022-01-10 02:55:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:08,940 INFO L225 Difference]: With dead ends: 628 [2022-01-10 02:55:08,940 INFO L226 Difference]: Without dead ends: 606 [2022-01-10 02:55:08,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 02:55:08,941 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 237 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:08,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1349 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:55:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-10 02:55:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 467. [2022-01-10 02:55:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.4227467811158798) internal successors, (663), 466 states have internal predecessors, (663), 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 02:55:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 663 transitions. [2022-01-10 02:55:09,078 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 663 transitions. Word has length 30 [2022-01-10 02:55:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:09,078 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 663 transitions. [2022-01-10 02:55:09,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 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 02:55:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 663 transitions. [2022-01-10 02:55:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:55:09,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:09,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:09,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:09,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:09,288 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:09,289 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2022-01-10 02:55:09,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:09,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095537648] [2022-01-10 02:55:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:55:09,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:09,290 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:09,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 02:55:09,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:55:09,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:09,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:55:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:55:09,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:55:09,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:09,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095537648] [2022-01-10 02:55:09,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095537648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:09,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:09,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:55:09,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130962273] [2022-01-10 02:55:09,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:09,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:55:09,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:55:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:55:09,894 INFO L87 Difference]: Start difference. First operand 467 states and 663 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 02:55:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:10,491 INFO L93 Difference]: Finished difference Result 506 states and 701 transitions. [2022-01-10 02:55:10,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 02:55:10,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 30 [2022-01-10 02:55:10,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:10,494 INFO L225 Difference]: With dead ends: 506 [2022-01-10 02:55:10,494 INFO L226 Difference]: Without dead ends: 481 [2022-01-10 02:55:10,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 02:55:10,494 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 144 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:10,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 407 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 136 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-10 02:55:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-10 02:55:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 467. [2022-01-10 02:55:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.388412017167382) internal successors, (647), 466 states have internal predecessors, (647), 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 02:55:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 647 transitions. [2022-01-10 02:55:10,652 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 647 transitions. Word has length 30 [2022-01-10 02:55:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:10,652 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 647 transitions. [2022-01-10 02:55:10,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 02:55:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 647 transitions. [2022-01-10 02:55:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:55:10,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:10,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:10,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:10,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:10,863 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 23 times [2022-01-10 02:55:10,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:10,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205152023] [2022-01-10 02:55:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:55:10,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:10,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:10,864 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:10,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 02:55:10,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-10 02:55:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:55:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 02:55:10,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 02:55:11,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:11,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205152023] [2022-01-10 02:55:11,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205152023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:11,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:11,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:55:11,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120190217] [2022-01-10 02:55:11,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:11,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:55:11,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:55:11,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:55:11,134 INFO L87 Difference]: Start difference. First operand 467 states and 647 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 02:55:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:12,403 INFO L93 Difference]: Finished difference Result 1594 states and 2270 transitions. [2022-01-10 02:55:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 02:55:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 31 [2022-01-10 02:55:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:12,407 INFO L225 Difference]: With dead ends: 1594 [2022-01-10 02:55:12,407 INFO L226 Difference]: Without dead ends: 1322 [2022-01-10 02:55:12,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:55:12,408 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 343 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:12,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 542 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:55:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-01-10 02:55:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 475. [2022-01-10 02:55:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.3860759493670887) internal successors, (657), 474 states have internal predecessors, (657), 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 02:55:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 657 transitions. [2022-01-10 02:55:12,577 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 657 transitions. Word has length 31 [2022-01-10 02:55:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:12,577 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 657 transitions. [2022-01-10 02:55:12,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 02:55:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 657 transitions. [2022-01-10 02:55:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:55:12,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:12,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:12,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:12,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:12,788 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 24 times [2022-01-10 02:55:12,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:12,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741802539] [2022-01-10 02:55:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:55:12,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:12,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:12,790 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 02:55:12,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 02:55:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:12,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:55:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 02:55:12,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 02:55:13,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:13,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741802539] [2022-01-10 02:55:13,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741802539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:13,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:13,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:55:13,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044427436] [2022-01-10 02:55:13,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:13,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:55:13,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:55:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:55:13,054 INFO L87 Difference]: Start difference. First operand 475 states and 657 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 02:55:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:14,302 INFO L93 Difference]: Finished difference Result 680 states and 890 transitions. [2022-01-10 02:55:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 02:55:14,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 31 [2022-01-10 02:55:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:14,305 INFO L225 Difference]: With dead ends: 680 [2022-01-10 02:55:14,305 INFO L226 Difference]: Without dead ends: 674 [2022-01-10 02:55:14,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:55:14,306 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 143 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:14,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 363 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:55:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-10 02:55:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 488. [2022-01-10 02:55:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.4004106776180698) internal successors, (682), 487 states have internal predecessors, (682), 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 02:55:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 682 transitions. [2022-01-10 02:55:14,495 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 682 transitions. Word has length 31 [2022-01-10 02:55:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:14,495 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 682 transitions. [2022-01-10 02:55:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 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 02:55:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 682 transitions. [2022-01-10 02:55:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:55:14,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:14,496 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:14,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 02:55:14,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:14,706 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:14,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 25 times [2022-01-10 02:55:14,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:14,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263476984] [2022-01-10 02:55:14,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:55:14,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:14,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:14,708 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:14,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 02:55:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:55:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 02:55:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:55:15,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:55:15,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263476984] [2022-01-10 02:55:15,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263476984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:15,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:15,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 34 [2022-01-10 02:55:15,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143349391] [2022-01-10 02:55:15,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:15,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:55:15,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:55:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:55:15,480 INFO L87 Difference]: Start difference. First operand 488 states and 682 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 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 02:55:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:17,008 INFO L93 Difference]: Finished difference Result 810 states and 1052 transitions. [2022-01-10 02:55:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 02:55:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 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 32 [2022-01-10 02:55:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:17,010 INFO L225 Difference]: With dead ends: 810 [2022-01-10 02:55:17,010 INFO L226 Difference]: Without dead ends: 801 [2022-01-10 02:55:17,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=2712, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 02:55:17,011 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 232 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:17,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 2233 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 02:55:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-10 02:55:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 523. [2022-01-10 02:55:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.396551724137931) internal successors, (729), 522 states have internal predecessors, (729), 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 02:55:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 729 transitions. [2022-01-10 02:55:17,213 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 729 transitions. Word has length 32 [2022-01-10 02:55:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:17,213 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 729 transitions. [2022-01-10 02:55:17,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 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 02:55:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 729 transitions. [2022-01-10 02:55:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:55:17,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:17,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:17,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 02:55:17,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:17,418 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 26 times [2022-01-10 02:55:17,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:17,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362345771] [2022-01-10 02:55:17,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:55:17,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:17,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:17,420 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:17,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 02:55:17,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:55:17,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 02:55:17,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:55:17,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:55:18,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362345771] [2022-01-10 02:55:18,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362345771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:18,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:18,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2022-01-10 02:55:18,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221026954] [2022-01-10 02:55:18,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:18,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 02:55:18,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 02:55:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 02:55:18,307 INFO L87 Difference]: Start difference. First operand 523 states and 729 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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 02:55:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:19,632 INFO L93 Difference]: Finished difference Result 704 states and 923 transitions. [2022-01-10 02:55:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 02:55:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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 32 [2022-01-10 02:55:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:19,634 INFO L225 Difference]: With dead ends: 704 [2022-01-10 02:55:19,634 INFO L226 Difference]: Without dead ends: 681 [2022-01-10 02:55:19,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=2595, Unknown=0, NotChecked=0, Total=2862 [2022-01-10 02:55:19,635 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 260 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:19,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1801 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:55:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-10 02:55:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 526. [2022-01-10 02:55:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.4095238095238096) internal successors, (740), 525 states have internal predecessors, (740), 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 02:55:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 740 transitions. [2022-01-10 02:55:19,822 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 740 transitions. Word has length 32 [2022-01-10 02:55:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:19,822 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 740 transitions. [2022-01-10 02:55:19,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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 02:55:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 740 transitions. [2022-01-10 02:55:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:55:19,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:19,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:19,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 02:55:20,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:20,025 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 27 times [2022-01-10 02:55:20,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:20,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408359827] [2022-01-10 02:55:20,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:55:20,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:20,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:20,027 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:20,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 02:55:20,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:55:20,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 02:55:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:55:20,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:55:20,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:20,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408359827] [2022-01-10 02:55:20,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408359827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:20,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:20,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2022-01-10 02:55:20,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196065143] [2022-01-10 02:55:20,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:20,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 02:55:20,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 02:55:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-01-10 02:55:20,798 INFO L87 Difference]: Start difference. First operand 526 states and 740 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 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 02:55:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:55:21,959 INFO L93 Difference]: Finished difference Result 665 states and 891 transitions. [2022-01-10 02:55:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 02:55:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 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 32 [2022-01-10 02:55:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:55:21,961 INFO L225 Difference]: With dead ends: 665 [2022-01-10 02:55:21,961 INFO L226 Difference]: Without dead ends: 659 [2022-01-10 02:55:21,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:55:21,961 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 198 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:55:21,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1442 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:55:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-10 02:55:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-01-10 02:55:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.4083484573502723) internal successors, (776), 551 states have internal predecessors, (776), 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 02:55:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 776 transitions. [2022-01-10 02:55:22,145 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 776 transitions. Word has length 32 [2022-01-10 02:55:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:55:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 776 transitions. [2022-01-10 02:55:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 states have internal predecessors, (46), 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 02:55:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 776 transitions. [2022-01-10 02:55:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 02:55:22,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:55:22,146 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:55:22,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 02:55:22,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:55:22,352 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:55:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:55:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash -466377097, now seen corresponding path program 28 times [2022-01-10 02:55:22,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:55:22,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752218462] [2022-01-10 02:55:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:55:22,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:55:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:55:22,354 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:55:22,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 02:55:22,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:55:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:55:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 02:55:22,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:55:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 02:55:24,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:55:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:55:27,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:55:27,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752218462] [2022-01-10 02:55:27,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752218462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:55:27,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:55:27,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2022-01-10 02:55:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698241874] [2022-01-10 02:55:27,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:55:27,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 02:55:27,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:55:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 02:55:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-10 02:55:27,884 INFO L87 Difference]: Start difference. First operand 552 states and 776 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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)