/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:15:33,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:15:33,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:15:33,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:15:33,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:15:33,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:15:33,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:15:33,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:15:33,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:15:33,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:15:33,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:15:33,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:15:33,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:15:33,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:15:33,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:15:33,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:15:33,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:15:33,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:15:33,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:15:33,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:15:33,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:15:33,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:15:33,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:15:33,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:15:33,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:15:33,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:15:33,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:15:33,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:15:33,853 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 08:15:33,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:15:33,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:15:33,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:15:33,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:15:33,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:15:33,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:15:33,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:15:33,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:15:33,875 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:15:33,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:15:33,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:15:33,877 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:15:33,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:15:33,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:15:33,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:15:33,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:15:33,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:15:33,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:15:33,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:15:33,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:15:33,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:15:34,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:15:34,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:15:34,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:15:34,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:15:34,101 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:15:34,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c [2022-01-10 08:15:34,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ccef062/447786421cb84b51b763d60f35183154/FLAGc2053cefb [2022-01-10 08:15:34,804 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:15:34,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c [2022-01-10 08:15:34,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ccef062/447786421cb84b51b763d60f35183154/FLAGc2053cefb [2022-01-10 08:15:35,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37ccef062/447786421cb84b51b763d60f35183154 [2022-01-10 08:15:35,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:15:35,205 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:15:35,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:15:35,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:15:35,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:15:35,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:15:35" (1/1) ... [2022-01-10 08:15:35,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de0670b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:35, skipping insertion in model container [2022-01-10 08:15:35,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:15:35" (1/1) ... [2022-01-10 08:15:35,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:15:35,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:15:35,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[26860,26873] [2022-01-10 08:15:35,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[29197,29210] [2022-01-10 08:15:36,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:15:36,381 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:15:36,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[26860,26873] [2022-01-10 08:15:36,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c[29197,29210] [2022-01-10 08:15:36,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:15:36,865 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:15:36,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36 WrapperNode [2022-01-10 08:15:36,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:15:36,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:15:36,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:15:36,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:15:36,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:36,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,093 INFO L137 Inliner]: procedures = 40, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5247 [2022-01-10 08:15:37,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:15:37,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:15:37,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:15:37,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:15:37,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:15:37,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:15:37,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:15:37,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:15:37,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (1/1) ... [2022-01-10 08:15:37,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:15:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:15:37,308 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 08:15:37,335 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 08:15:37,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:15:37,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:15:37,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:15:37,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:15:37,490 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:15:37,491 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:15:58,613 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:15:58,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:15:58,628 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 08:15:58,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:15:58 BoogieIcfgContainer [2022-01-10 08:15:58,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:15:58,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:15:58,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:15:58,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:15:58,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:15:35" (1/3) ... [2022-01-10 08:15:58,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44294a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:15:58, skipping insertion in model container [2022-01-10 08:15:58,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:15:36" (2/3) ... [2022-01-10 08:15:58,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44294a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:15:58, skipping insertion in model container [2022-01-10 08:15:58,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:15:58" (3/3) ... [2022-01-10 08:15:58,643 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.BOUNDED-16.pals+Problem12_label03.c [2022-01-10 08:15:58,647 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:15:58,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:15:58,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:15:58,711 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 08:15:58,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:15:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 963 states, 960 states have (on average 1.896875) internal successors, (1821), 962 states have internal predecessors, (1821), 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 08:15:58,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 08:15:58,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:15:58,756 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 08:15:58,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:15:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:15:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 193046949, now seen corresponding path program 1 times [2022-01-10 08:15:58,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:15:58,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890637164] [2022-01-10 08:15:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:15:58,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:15:58,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:15:58,777 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 08:15:58,781 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 08:15:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:15:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:15:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:15:59,039 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 08:15:59,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:15:59,039 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:15:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890637164] [2022-01-10 08:15:59,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890637164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:15:59,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:15:59,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:15:59,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674810607] [2022-01-10 08:15:59,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:15:59,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:15:59,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:15:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:15:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:15:59,086 INFO L87 Difference]: Start difference. First operand has 963 states, 960 states have (on average 1.896875) internal successors, (1821), 962 states have internal predecessors, (1821), 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 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 08:16:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:16:29,624 INFO L93 Difference]: Finished difference Result 2614 states and 5014 transitions. [2022-01-10 08:16:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:16:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 08:16:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:16:29,654 INFO L225 Difference]: With dead ends: 2614 [2022-01-10 08:16:29,655 INFO L226 Difference]: Without dead ends: 1648 [2022-01-10 08:16:29,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 08:16:29,665 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1067 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:16:29,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 735 Invalid, 2985 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 30.3s Time] [2022-01-10 08:16:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-01-10 08:16:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2022-01-10 08:16:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1646 states have (on average 1.649453219927096) internal successors, (2715), 1647 states have internal predecessors, (2715), 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 08:16:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2715 transitions. [2022-01-10 08:16:29,769 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2715 transitions. Word has length 20 [2022-01-10 08:16:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:16:29,770 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2715 transitions. [2022-01-10 08:16:29,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 08:16:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2715 transitions. [2022-01-10 08:16:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 08:16:29,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:16:29,776 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, 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 08:16:29,787 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 08:16:29,985 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 08:16:29,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:16:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:16:29,987 INFO L85 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2022-01-10 08:16:29,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:16:29,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427275686] [2022-01-10 08:16:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:16:29,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:16:29,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:16:29,990 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 08:16:29,991 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 08:16:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:16:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:16:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:16:30,259 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 08:16:30,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:16:30,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:16:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427275686] [2022-01-10 08:16:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427275686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:16:30,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:16:30,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:16:30,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2492373] [2022-01-10 08:16:30,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:16:30,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:16:30,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:16:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:16:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:16:30,263 INFO L87 Difference]: Start difference. First operand 1648 states and 2715 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 08:16:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:16:30,391 INFO L93 Difference]: Finished difference Result 1728 states and 2840 transitions. [2022-01-10 08:16:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:16:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 46 [2022-01-10 08:16:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:16:30,403 INFO L225 Difference]: With dead ends: 1728 [2022-01-10 08:16:30,403 INFO L226 Difference]: Without dead ends: 1648 [2022-01-10 08:16:30,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:16:30,406 INFO L933 BasicCegarLoop]: 1686 mSDtfsCounter, 3 mSDsluCounter, 4994 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6680 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:16:30,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6680 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:16:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-01-10 08:16:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1648. [2022-01-10 08:16:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1646 states have (on average 1.6123936816524909) internal successors, (2654), 1647 states have internal predecessors, (2654), 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 08:16:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2654 transitions. [2022-01-10 08:16:30,449 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2654 transitions. Word has length 46 [2022-01-10 08:16:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:16:30,451 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2654 transitions. [2022-01-10 08:16:30,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 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 08:16:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2654 transitions. [2022-01-10 08:16:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 08:16:30,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:16:30,454 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:16:30,467 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 08:16:30,664 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 08:16:30,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:16:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:16:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash -686299155, now seen corresponding path program 1 times [2022-01-10 08:16:30,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:16:30,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67711733] [2022-01-10 08:16:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:16:30,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:16:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:16:30,667 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 08:16:30,669 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 08:16:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:16:30,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:16:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:16:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:16:30,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:16:30,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:16:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67711733] [2022-01-10 08:16:30,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67711733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:16:30,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:16:30,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:16:30,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889927323] [2022-01-10 08:16:30,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:16:30,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:16:30,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:16:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:16:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:16:30,942 INFO L87 Difference]: Start difference. First operand 1648 states and 2654 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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)