/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/eca-rers2012/Problem03_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:21:54,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:21:54,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:21:55,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 04:21:55,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:21:55,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:21:55,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:21:55,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:21:55,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:21:55,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:21:55,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:21:55,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:21:55,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:21:55,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:21:55,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:21:55,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:21:55,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:21:55,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:21:55,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:21:55,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:21:55,119 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 04:21:55,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:21:55,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:21:55,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:21:55,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:21:55,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:21:55,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:21:55,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:21:55,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:21:55,150 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:21:55,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:21:55,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:21:55,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:21:55,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:21:55,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:21:55,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:21:55,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:21:55,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:21:55,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:21:55,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:21:55,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:21:55,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:21:55,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:21:55,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:21:55,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:21:55,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:21:55,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:21:55,382 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:21:55,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2022-01-10 04:21:55,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17ed38e6/d353d836140948c1b9424429a9ff193c/FLAG04dd01c04 [2022-01-10 04:21:55,992 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:21:55,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2022-01-10 04:21:56,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17ed38e6/d353d836140948c1b9424429a9ff193c/FLAG04dd01c04 [2022-01-10 04:21:56,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a17ed38e6/d353d836140948c1b9424429a9ff193c [2022-01-10 04:21:56,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:21:56,245 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:21:56,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:21:56,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:21:56,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:21:56,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:21:56" (1/1) ... [2022-01-10 04:21:56,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673c7bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:56, skipping insertion in model container [2022-01-10 04:21:56,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:21:56" (1/1) ... [2022-01-10 04:21:56,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:21:56,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:21:56,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c[59879,59892] [2022-01-10 04:21:56,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:21:56,818 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:21:56,981 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c[59879,59892] [2022-01-10 04:21:56,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:21:57,008 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:21:57,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57 WrapperNode [2022-01-10 04:21:57,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:21:57,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:21:57,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:21:57,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:21:57,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,133 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 04:21:57,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:21:57,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:21:57,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:21:57,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:21:57,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:21:57,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:21:57,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:21:57,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:21:57,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (1/1) ... [2022-01-10 04:21:57,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:21:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:21:57,300 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 04:21:57,318 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 04:21:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:21:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:21:57,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:21:57,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:21:57,465 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:21:57,476 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:21:59,196 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:21:59,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:21:59,205 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 04:21:59,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:21:59 BoogieIcfgContainer [2022-01-10 04:21:59,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:21:59,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:21:59,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:21:59,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:21:59,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:21:56" (1/3) ... [2022-01-10 04:21:59,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:21:59, skipping insertion in model container [2022-01-10 04:21:59,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:21:57" (2/3) ... [2022-01-10 04:21:59,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:21:59, skipping insertion in model container [2022-01-10 04:21:59,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:21:59" (3/3) ... [2022-01-10 04:21:59,218 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2022-01-10 04:21:59,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:21:59,222 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:21:59,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:21:59,284 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 04:21:59,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:21:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 04:21:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-10 04:21:59,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:21:59,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:21:59,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:21:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:21:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -502159206, now seen corresponding path program 1 times [2022-01-10 04:21:59,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:21:59,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509214354] [2022-01-10 04:21:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:21:59,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:21:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:21:59,345 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 04:21:59,373 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 04:21:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:21:59,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 04:21:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:22:16,040 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 04:22:16,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:22:16,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:22:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509214354] [2022-01-10 04:22:16,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509214354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:22:16,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:22:16,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 04:22:16,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361692845] [2022-01-10 04:22:16,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:22:16,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 04:22:16,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:22:16,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 04:22:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-10 04:22:16,084 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 10 states, 10 states have (on average 19.0) internal successors, (190), 9 states have internal predecessors, (190), 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 04:22:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:22:22,270 INFO L93 Difference]: Finished difference Result 1133 states and 2085 transitions. [2022-01-10 04:22:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 04:22:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 9 states have internal predecessors, (190), 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 190 [2022-01-10 04:22:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:22:22,288 INFO L225 Difference]: With dead ends: 1133 [2022-01-10 04:22:22,288 INFO L226 Difference]: Without dead ends: 761 [2022-01-10 04:22:22,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-01-10 04:22:22,295 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 1613 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 4261 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 4627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 4261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:22:22,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1613 Valid, 451 Invalid, 4627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 4261 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-10 04:22:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-10 04:22:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 758. [2022-01-10 04:22:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.272126816380449) internal successors, (963), 757 states have internal predecessors, (963), 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 04:22:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 963 transitions. [2022-01-10 04:22:22,360 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 963 transitions. Word has length 190 [2022-01-10 04:22:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:22:22,361 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 963 transitions. [2022-01-10 04:22:22,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 9 states have internal predecessors, (190), 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 04:22:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 963 transitions. [2022-01-10 04:22:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 04:22:22,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:22:22,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:22:22,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 04:22:22,571 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 04:22:22,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:22:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:22:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1941580283, now seen corresponding path program 1 times [2022-01-10 04:22:22,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:22:22,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179165225] [2022-01-10 04:22:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:22:22,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:22:22,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:22:22,579 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 04:22:22,581 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 04:22:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:22:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 04:22:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:22:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:22:39,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:22:39,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:22:39,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179165225] [2022-01-10 04:22:39,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179165225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:22:39,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:22:39,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-10 04:22:39,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647000151] [2022-01-10 04:22:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:22:39,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 04:22:39,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:22:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 04:22:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-10 04:22:39,756 INFO L87 Difference]: Start difference. First operand 758 states and 963 transitions. Second operand has 11 states, 11 states have (on average 17.90909090909091) internal successors, (197), 10 states have internal predecessors, (197), 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 04:22:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:22:45,255 INFO L93 Difference]: Finished difference Result 1545 states and 2322 transitions. [2022-01-10 04:22:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 04:22:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 17.90909090909091) internal successors, (197), 10 states have internal predecessors, (197), 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 197 [2022-01-10 04:22:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:22:45,266 INFO L225 Difference]: With dead ends: 1545 [2022-01-10 04:22:45,266 INFO L226 Difference]: Without dead ends: 1308 [2022-01-10 04:22:45,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-10 04:22:45,270 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 1469 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5152 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 5399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 5152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:22:45,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 375 Invalid, 5399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 5152 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-01-10 04:22:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-01-10 04:22:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 899. [2022-01-10 04:22:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.2371937639198218) internal successors, (1111), 898 states have internal predecessors, (1111), 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 04:22:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1111 transitions. [2022-01-10 04:22:45,308 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1111 transitions. Word has length 197 [2022-01-10 04:22:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:22:45,309 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1111 transitions. [2022-01-10 04:22:45,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.90909090909091) internal successors, (197), 10 states have internal predecessors, (197), 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 04:22:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1111 transitions. [2022-01-10 04:22:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-10 04:22:45,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:22:45,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:22:45,328 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 04:22:45,521 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 04:22:45,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:22:45,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:22:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1515877476, now seen corresponding path program 1 times [2022-01-10 04:22:45,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:22:45,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019450534] [2022-01-10 04:22:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:22:45,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:22:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:22:45,525 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 04:22:45,526 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 04:22:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:22:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 04:22:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:22:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 04:22:47,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:22:47,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:22:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019450534] [2022-01-10 04:22:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019450534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:22:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:22:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 04:22:47,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776731145] [2022-01-10 04:22:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:22:47,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 04:22:47,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:22:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 04:22:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:22:47,915 INFO L87 Difference]: Start difference. First operand 899 states and 1111 transitions. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 4 states have internal predecessors, (200), 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 04:22:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:22:49,810 INFO L93 Difference]: Finished difference Result 2134 states and 3010 transitions. [2022-01-10 04:22:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 04:22:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 4 states have internal predecessors, (200), 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 205 [2022-01-10 04:22:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:22:49,816 INFO L225 Difference]: With dead ends: 2134 [2022-01-10 04:22:49,816 INFO L226 Difference]: Without dead ends: 1694 [2022-01-10 04:22:49,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:22:49,818 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1058 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:22:49,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 98 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 04:22:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-01-10 04:22:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1515. [2022-01-10 04:22:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 1.2470277410832233) internal successors, (1888), 1514 states have internal predecessors, (1888), 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 04:22:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1888 transitions. [2022-01-10 04:22:49,843 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1888 transitions. Word has length 205 [2022-01-10 04:22:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:22:49,843 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 1888 transitions. [2022-01-10 04:22:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 4 states have internal predecessors, (200), 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 04:22:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1888 transitions. [2022-01-10 04:22:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-10 04:22:49,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:22:49,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:22:49,858 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 04:22:50,057 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 04:22:50,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:22:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:22:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1967271296, now seen corresponding path program 1 times [2022-01-10 04:22:50,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:22:50,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321736424] [2022-01-10 04:22:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:22:50,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:22:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:22:50,061 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 04:22:50,062 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 04:22:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:22:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:22:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:22:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:22:50,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:22:50,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:22:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321736424] [2022-01-10 04:22:50,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321736424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:22:50,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:22:50,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:22:50,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578728228] [2022-01-10 04:22:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:22:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:22:50,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:22:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:22:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:22:50,497 INFO L87 Difference]: Start difference. First operand 1515 states and 1888 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 04:22:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:22:51,413 INFO L93 Difference]: Finished difference Result 2574 states and 3475 transitions. [2022-01-10 04:22:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:22:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 218 [2022-01-10 04:22:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:22:51,418 INFO L225 Difference]: With dead ends: 2574 [2022-01-10 04:22:51,418 INFO L226 Difference]: Without dead ends: 1315 [2022-01-10 04:22:51,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 216 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 04:22:51,420 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 189 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 04:22:51,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 214 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 04:22:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-01-10 04:22:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1312. [2022-01-10 04:22:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.2700228832951945) internal successors, (1665), 1311 states have internal predecessors, (1665), 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 04:22:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1665 transitions. [2022-01-10 04:22:51,441 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1665 transitions. Word has length 218 [2022-01-10 04:22:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:22:51,442 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1665 transitions. [2022-01-10 04:22:51,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 04:22:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1665 transitions. [2022-01-10 04:22:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-10 04:22:51,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:22:51,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:22:51,459 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 04:22:51,654 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 04:22:51,655 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:22:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:22:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash -724694231, now seen corresponding path program 1 times [2022-01-10 04:22:51,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:22:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253737930] [2022-01-10 04:22:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:22:51,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:22:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:22:51,659 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 04:22:51,660 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 04:22:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:22:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 04:22:51,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:22:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:22:55,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:22:55,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:22:55,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253737930] [2022-01-10 04:22:55,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253737930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:22:55,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:22:55,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:22:55,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643381041] [2022-01-10 04:22:55,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:22:55,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:22:55,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:22:55,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:22:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:22:55,254 INFO L87 Difference]: Start difference. First operand 1312 states and 1665 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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)