/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:52:12,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:52:12,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:52:12,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:52:12,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:52:12,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:52:12,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:52:12,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:52:12,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:52:12,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:52:12,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:52:12,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:52:12,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:52:12,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:52:12,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:52:12,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:52:12,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:52:12,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:52:12,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:52:12,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:52:12,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:52:12,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:52:12,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:52:12,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:52:12,632 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:52:12,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:52:12,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:52:12,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:52:12,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:52:12,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:52:12,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:52:12,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:52:12,634 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:52:12,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:52:12,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:52:12,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:52:12,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:52:12,635 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:52:12,636 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:52:12,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:52:12,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:52:12,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:52:12,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:52:12,826 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:52:12,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label51.c [2022-01-10 21:52:12,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76810a261/6bf3f84531d34ca7920c247d173df6e2/FLAG0d7f65380 [2022-01-10 21:52:13,367 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:52:13,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label51.c [2022-01-10 21:52:13,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76810a261/6bf3f84531d34ca7920c247d173df6e2/FLAG0d7f65380 [2022-01-10 21:52:13,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76810a261/6bf3f84531d34ca7920c247d173df6e2 [2022-01-10 21:52:13,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:52:13,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:52:13,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:52:13,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:52:13,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:52:13,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fec3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:13, skipping insertion in model container [2022-01-10 21:52:13,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:52:13" (1/1) ... [2022-01-10 21:52:13,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:52:13,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:52:13,899 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_label51.c[59610,59623] [2022-01-10 21:52:13,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:52:13,932 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:52:14,040 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_label51.c[59610,59623] [2022-01-10 21:52:14,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:52:14,064 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:52:14,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14 WrapperNode [2022-01-10 21:52:14,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:52:14,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:52:14,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:52:14,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:52:14,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,180 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:52:14,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:52:14,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:52:14,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:52:14,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:52:14,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:52:14,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:52:14,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:52:14,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:52:14,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (1/1) ... [2022-01-10 21:52:14,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:52:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:52:14,336 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 21:52:14,359 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 21:52:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:52:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:52:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:52:14,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:52:14,434 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:52:14,435 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:52:15,896 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:52:15,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:52:15,909 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:52:15,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:52:15 BoogieIcfgContainer [2022-01-10 21:52:15,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:52:15,911 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:52:15,912 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:52:15,913 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:52:15,915 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:52:15" (1/1) ... [2022-01-10 21:52:16,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:52:16 BasicIcfg [2022-01-10 21:52:16,284 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:52:16,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:52:16,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:52:16,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:52:16,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:52:13" (1/4) ... [2022-01-10 21:52:16,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a0244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:52:16, skipping insertion in model container [2022-01-10 21:52:16,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:52:14" (2/4) ... [2022-01-10 21:52:16,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a0244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:52:16, skipping insertion in model container [2022-01-10 21:52:16,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:52:15" (3/4) ... [2022-01-10 21:52:16,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a0244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:52:16, skipping insertion in model container [2022-01-10 21:52:16,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:52:16" (4/4) ... [2022-01-10 21:52:16,290 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label51.cTransformedIcfg [2022-01-10 21:52:16,294 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:52:16,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:52:16,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:52:16,342 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 21:52:16,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:52:16,360 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 21:52:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-10 21:52:16,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:16,378 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] [2022-01-10 21:52:16,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1182835478, now seen corresponding path program 1 times [2022-01-10 21:52:16,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:16,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753086160] [2022-01-10 21:52:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:16,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:17,015 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 21:52:17,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:17,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753086160] [2022-01-10 21:52:17,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753086160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:17,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:17,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:17,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877074948] [2022-01-10 21:52:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:17,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:17,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:17,051 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 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 21:52:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:18,156 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-01-10 21:52:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 188 [2022-01-10 21:52:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:18,167 INFO L225 Difference]: With dead ends: 864 [2022-01-10 21:52:18,168 INFO L226 Difference]: Without dead ends: 468 [2022-01-10 21:52:18,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:18,172 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 90 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:18,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 165 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:52:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-10 21:52:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-01-10 21:52:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 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 21:52:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-01-10 21:52:18,233 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 188 [2022-01-10 21:52:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-01-10 21:52:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 21:52:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-01-10 21:52:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-10 21:52:18,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:18,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:18,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:52:18,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1505029396, now seen corresponding path program 1 times [2022-01-10 21:52:18,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:18,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094711598] [2022-01-10 21:52:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:18,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:18,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094711598] [2022-01-10 21:52:18,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094711598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:18,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:18,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:18,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446623939] [2022-01-10 21:52:18,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:18,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:18,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:18,343 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 21:52:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:18,691 INFO L93 Difference]: Finished difference Result 1345 states and 2190 transitions. [2022-01-10 21:52:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:18,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 193 [2022-01-10 21:52:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:18,694 INFO L225 Difference]: With dead ends: 1345 [2022-01-10 21:52:18,695 INFO L226 Difference]: Without dead ends: 893 [2022-01-10 21:52:18,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:18,696 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:18,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:52:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-10 21:52:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 891. [2022-01-10 21:52:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.6258426966292134) internal successors, (1447), 890 states have internal predecessors, (1447), 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 21:52:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1447 transitions. [2022-01-10 21:52:18,726 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1447 transitions. Word has length 193 [2022-01-10 21:52:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:18,727 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1447 transitions. [2022-01-10 21:52:18,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 21:52:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1447 transitions. [2022-01-10 21:52:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-10 21:52:18,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:18,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:18,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:52:18,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 257726321, now seen corresponding path program 1 times [2022-01-10 21:52:18,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140274553] [2022-01-10 21:52:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:18,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:18,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:18,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140274553] [2022-01-10 21:52:18,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140274553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:18,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:18,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:18,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862659938] [2022-01-10 21:52:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:18,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:18,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:18,868 INFO L87 Difference]: Start difference. First operand 891 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 21:52:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:19,733 INFO L93 Difference]: Finished difference Result 2618 states and 4270 transitions. [2022-01-10 21:52:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 194 [2022-01-10 21:52:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:19,739 INFO L225 Difference]: With dead ends: 2618 [2022-01-10 21:52:19,739 INFO L226 Difference]: Without dead ends: 1729 [2022-01-10 21:52:19,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:19,741 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 250 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:19,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 161 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-01-10 21:52:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1726. [2022-01-10 21:52:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.5205797101449274) internal successors, (2623), 1725 states have internal predecessors, (2623), 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 21:52:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2623 transitions. [2022-01-10 21:52:19,767 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2623 transitions. Word has length 194 [2022-01-10 21:52:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2623 transitions. [2022-01-10 21:52:19,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 21:52:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2623 transitions. [2022-01-10 21:52:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-10 21:52:19,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:19,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:19,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:52:19,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1150563790, now seen corresponding path program 1 times [2022-01-10 21:52:19,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:19,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452584460] [2022-01-10 21:52:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:19,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:19,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:19,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452584460] [2022-01-10 21:52:19,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452584460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:19,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:19,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:19,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064026317] [2022-01-10 21:52:19,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:19,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:19,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:19,850 INFO L87 Difference]: Start difference. First operand 1726 states and 2623 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 21:52:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:20,765 INFO L93 Difference]: Finished difference Result 5105 states and 7787 transitions. [2022-01-10 21:52:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 196 [2022-01-10 21:52:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:20,775 INFO L225 Difference]: With dead ends: 5105 [2022-01-10 21:52:20,775 INFO L226 Difference]: Without dead ends: 3381 [2022-01-10 21:52:20,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:20,784 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:20,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:52:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2022-01-10 21:52:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3352. [2022-01-10 21:52:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.495971351835273) internal successors, (5013), 3351 states have internal predecessors, (5013), 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 21:52:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5013 transitions. [2022-01-10 21:52:20,843 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5013 transitions. Word has length 196 [2022-01-10 21:52:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:20,843 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 5013 transitions. [2022-01-10 21:52:20,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 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 21:52:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5013 transitions. [2022-01-10 21:52:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 21:52:20,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:20,848 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] [2022-01-10 21:52:20,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:52:20,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash -115946442, now seen corresponding path program 1 times [2022-01-10 21:52:20,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802627323] [2022-01-10 21:52:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:20,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:21,153 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 21:52:21,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802627323] [2022-01-10 21:52:21,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802627323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:21,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:21,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:21,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055000228] [2022-01-10 21:52:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:21,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:21,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:21,156 INFO L87 Difference]: Start difference. First operand 3352 states and 5013 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 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 21:52:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:22,218 INFO L93 Difference]: Finished difference Result 6998 states and 10543 transitions. [2022-01-10 21:52:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 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 203 [2022-01-10 21:52:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:22,227 INFO L225 Difference]: With dead ends: 6998 [2022-01-10 21:52:22,227 INFO L226 Difference]: Without dead ends: 3300 [2022-01-10 21:52:22,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:22,231 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 331 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:22,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:52:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2022-01-10 21:52:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 3300. [2022-01-10 21:52:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3299 states have (on average 1.3473779933313126) internal successors, (4445), 3299 states have internal predecessors, (4445), 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 21:52:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 4445 transitions. [2022-01-10 21:52:22,282 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 4445 transitions. Word has length 203 [2022-01-10 21:52:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:22,283 INFO L470 AbstractCegarLoop]: Abstraction has 3300 states and 4445 transitions. [2022-01-10 21:52:22,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 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 21:52:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 4445 transitions. [2022-01-10 21:52:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-10 21:52:22,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:22,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:52:22,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:52:22,297 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1446775744, now seen corresponding path program 1 times [2022-01-10 21:52:22,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:22,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099072259] [2022-01-10 21:52:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:22,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:22,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:22,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099072259] [2022-01-10 21:52:22,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099072259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:22,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:22,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:22,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071969736] [2022-01-10 21:52:22,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:22,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:22,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:22,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:22,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:22,386 INFO L87 Difference]: Start difference. First operand 3300 states and 4445 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 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 21:52:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:23,190 INFO L93 Difference]: Finished difference Result 9849 states and 13270 transitions. [2022-01-10 21:52:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 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 211 [2022-01-10 21:52:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:23,208 INFO L225 Difference]: With dead ends: 9849 [2022-01-10 21:52:23,209 INFO L226 Difference]: Without dead ends: 6551 [2022-01-10 21:52:23,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:23,214 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 201 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:23,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 112 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:52:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2022-01-10 21:52:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 6548. [2022-01-10 21:52:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6548 states, 6547 states have (on average 1.2349167557659997) internal successors, (8085), 6547 states have internal predecessors, (8085), 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 21:52:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 8085 transitions. [2022-01-10 21:52:23,325 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 8085 transitions. Word has length 211 [2022-01-10 21:52:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:23,325 INFO L470 AbstractCegarLoop]: Abstraction has 6548 states and 8085 transitions. [2022-01-10 21:52:23,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 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 21:52:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 8085 transitions. [2022-01-10 21:52:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-10 21:52:23,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:23,332 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] [2022-01-10 21:52:23,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:52:23,332 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1368692313, now seen corresponding path program 1 times [2022-01-10 21:52:23,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:23,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164174589] [2022-01-10 21:52:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:23,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:23,439 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 21:52:23,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164174589] [2022-01-10 21:52:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164174589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:23,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:23,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:23,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257471914] [2022-01-10 21:52:23,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:23,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:23,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:23,441 INFO L87 Difference]: Start difference. First operand 6548 states and 8085 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 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 21:52:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:24,206 INFO L93 Difference]: Finished difference Result 14733 states and 18171 transitions. [2022-01-10 21:52:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 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 216 [2022-01-10 21:52:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:24,226 INFO L225 Difference]: With dead ends: 14733 [2022-01-10 21:52:24,226 INFO L226 Difference]: Without dead ends: 8187 [2022-01-10 21:52:24,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:24,235 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 203 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:24,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 58 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:52:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8187 states. [2022-01-10 21:52:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8187 to 8184. [2022-01-10 21:52:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8184 states, 8183 states have (on average 1.2314554564340707) internal successors, (10077), 8183 states have internal predecessors, (10077), 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 21:52:24,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8184 states to 8184 states and 10077 transitions. [2022-01-10 21:52:24,345 INFO L78 Accepts]: Start accepts. Automaton has 8184 states and 10077 transitions. Word has length 216 [2022-01-10 21:52:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:24,346 INFO L470 AbstractCegarLoop]: Abstraction has 8184 states and 10077 transitions. [2022-01-10 21:52:24,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 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 21:52:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 8184 states and 10077 transitions. [2022-01-10 21:52:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 21:52:24,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:24,353 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] [2022-01-10 21:52:24,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:52:24,353 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1161059768, now seen corresponding path program 1 times [2022-01-10 21:52:24,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:24,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645012840] [2022-01-10 21:52:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:24,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:24,647 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 21:52:24,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:24,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645012840] [2022-01-10 21:52:24,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645012840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:24,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:24,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:24,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330269212] [2022-01-10 21:52:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:24,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:24,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:24,649 INFO L87 Difference]: Start difference. First operand 8184 states and 10077 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 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 21:52:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:25,856 INFO L93 Difference]: Finished difference Result 21609 states and 26531 transitions. [2022-01-10 21:52:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2022-01-10 21:52:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:25,882 INFO L225 Difference]: With dead ends: 21609 [2022-01-10 21:52:25,882 INFO L226 Difference]: Without dead ends: 13079 [2022-01-10 21:52:25,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:25,888 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 195 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:25,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 134 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:52:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13079 states. [2022-01-10 21:52:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13079 to 13077. [2022-01-10 21:52:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13077 states, 13076 states have (on average 1.2139033343530132) internal successors, (15873), 13076 states have internal predecessors, (15873), 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 21:52:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13077 states to 13077 states and 15873 transitions. [2022-01-10 21:52:26,066 INFO L78 Accepts]: Start accepts. Automaton has 13077 states and 15873 transitions. Word has length 219 [2022-01-10 21:52:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:26,068 INFO L470 AbstractCegarLoop]: Abstraction has 13077 states and 15873 transitions. [2022-01-10 21:52:26,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 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 21:52:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 13077 states and 15873 transitions. [2022-01-10 21:52:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-10 21:52:26,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:26,077 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 21:52:26,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:52:26,078 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1863575745, now seen corresponding path program 1 times [2022-01-10 21:52:26,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151606275] [2022-01-10 21:52:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:26,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:26,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:26,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151606275] [2022-01-10 21:52:26,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151606275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:26,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:26,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:26,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427393347] [2022-01-10 21:52:26,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:26,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:26,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:26,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:26,185 INFO L87 Difference]: Start difference. First operand 13077 states and 15873 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 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 21:52:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:27,203 INFO L93 Difference]: Finished difference Result 33263 states and 40262 transitions. [2022-01-10 21:52:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:27,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 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 223 [2022-01-10 21:52:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:27,230 INFO L225 Difference]: With dead ends: 33263 [2022-01-10 21:52:27,230 INFO L226 Difference]: Without dead ends: 20188 [2022-01-10 21:52:27,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:27,244 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 714 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:27,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 301 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:52:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20188 states. [2022-01-10 21:52:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20188 to 20184. [2022-01-10 21:52:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20184 states, 20183 states have (on average 1.1918446217113412) internal successors, (24055), 20183 states have internal predecessors, (24055), 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 21:52:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20184 states to 20184 states and 24055 transitions. [2022-01-10 21:52:27,457 INFO L78 Accepts]: Start accepts. Automaton has 20184 states and 24055 transitions. Word has length 223 [2022-01-10 21:52:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:27,457 INFO L470 AbstractCegarLoop]: Abstraction has 20184 states and 24055 transitions. [2022-01-10 21:52:27,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 3 states have internal predecessors, (223), 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 21:52:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20184 states and 24055 transitions. [2022-01-10 21:52:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-10 21:52:27,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:27,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-01-10 21:52:27,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:52:27,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash -389344688, now seen corresponding path program 1 times [2022-01-10 21:52:27,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:27,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456835734] [2022-01-10 21:52:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:27,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:27,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:27,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456835734] [2022-01-10 21:52:27,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456835734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:27,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:27,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:27,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280310523] [2022-01-10 21:52:27,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:27,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:27,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:27,576 INFO L87 Difference]: Start difference. First operand 20184 states and 24055 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 21:52:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:28,730 INFO L93 Difference]: Finished difference Result 61155 states and 73023 transitions. [2022-01-10 21:52:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 226 [2022-01-10 21:52:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:28,792 INFO L225 Difference]: With dead ends: 61155 [2022-01-10 21:52:28,793 INFO L226 Difference]: Without dead ends: 40973 [2022-01-10 21:52:28,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:28,818 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 504 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:28,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 437 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:52:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40973 states. [2022-01-10 21:52:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40973 to 40960. [2022-01-10 21:52:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40960 states, 40959 states have (on average 1.1890182865792622) internal successors, (48701), 40959 states have internal predecessors, (48701), 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 21:52:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40960 states to 40960 states and 48701 transitions. [2022-01-10 21:52:29,304 INFO L78 Accepts]: Start accepts. Automaton has 40960 states and 48701 transitions. Word has length 226 [2022-01-10 21:52:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:29,304 INFO L470 AbstractCegarLoop]: Abstraction has 40960 states and 48701 transitions. [2022-01-10 21:52:29,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 21:52:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 40960 states and 48701 transitions. [2022-01-10 21:52:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 21:52:29,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:29,320 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, 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] [2022-01-10 21:52:29,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:52:29,321 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1965999648, now seen corresponding path program 1 times [2022-01-10 21:52:29,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:29,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606066267] [2022-01-10 21:52:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:29,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:29,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:29,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606066267] [2022-01-10 21:52:29,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606066267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:29,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:29,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:29,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241727163] [2022-01-10 21:52:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:29,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:29,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:29,499 INFO L87 Difference]: Start difference. First operand 40960 states and 48701 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 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 21:52:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:30,710 INFO L93 Difference]: Finished difference Result 99652 states and 118363 transitions. [2022-01-10 21:52:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 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 239 [2022-01-10 21:52:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:30,786 INFO L225 Difference]: With dead ends: 99652 [2022-01-10 21:52:30,786 INFO L226 Difference]: Without dead ends: 58694 [2022-01-10 21:52:30,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:52:30,805 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 203 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:30,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 89 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58694 states. [2022-01-10 21:52:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58694 to 58692. [2022-01-10 21:52:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58692 states, 58691 states have (on average 1.175870235640899) internal successors, (69013), 58691 states have internal predecessors, (69013), 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 21:52:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58692 states to 58692 states and 69013 transitions. [2022-01-10 21:52:31,729 INFO L78 Accepts]: Start accepts. Automaton has 58692 states and 69013 transitions. Word has length 239 [2022-01-10 21:52:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:31,729 INFO L470 AbstractCegarLoop]: Abstraction has 58692 states and 69013 transitions. [2022-01-10 21:52:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 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 21:52:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 58692 states and 69013 transitions. [2022-01-10 21:52:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-10 21:52:31,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:31,774 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, 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, 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] [2022-01-10 21:52:31,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:52:31,774 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:31,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1617029292, now seen corresponding path program 1 times [2022-01-10 21:52:31,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:31,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591104816] [2022-01-10 21:52:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:31,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:31,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591104816] [2022-01-10 21:52:31,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591104816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:31,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:31,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:31,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269654954] [2022-01-10 21:52:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:31,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:31,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:31,970 INFO L87 Difference]: Start difference. First operand 58692 states and 69013 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 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 21:52:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:33,070 INFO L93 Difference]: Finished difference Result 158094 states and 185818 transitions. [2022-01-10 21:52:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:33,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 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 251 [2022-01-10 21:52:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:33,218 INFO L225 Difference]: With dead ends: 158094 [2022-01-10 21:52:33,218 INFO L226 Difference]: Without dead ends: 99404 [2022-01-10 21:52:33,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:33,397 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 163 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:33,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 99 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:52:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99404 states. [2022-01-10 21:52:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99404 to 99385. [2022-01-10 21:52:34,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99385 states, 99384 states have (on average 1.150356194156001) internal successors, (114327), 99384 states have internal predecessors, (114327), 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 21:52:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99385 states to 99385 states and 114327 transitions. [2022-01-10 21:52:34,418 INFO L78 Accepts]: Start accepts. Automaton has 99385 states and 114327 transitions. Word has length 251 [2022-01-10 21:52:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:34,418 INFO L470 AbstractCegarLoop]: Abstraction has 99385 states and 114327 transitions. [2022-01-10 21:52:34,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 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 21:52:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 99385 states and 114327 transitions. [2022-01-10 21:52:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-10 21:52:34,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:34,452 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 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] [2022-01-10 21:52:34,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:52:34,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:34,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1762347690, now seen corresponding path program 1 times [2022-01-10 21:52:34,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:34,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490596418] [2022-01-10 21:52:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:34,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 21:52:34,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490596418] [2022-01-10 21:52:34,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490596418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:34,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:34,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:34,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420836540] [2022-01-10 21:52:34,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:34,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:34,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:34,731 INFO L87 Difference]: Start difference. First operand 99385 states and 114327 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 21:52:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:36,423 INFO L93 Difference]: Finished difference Result 214416 states and 245540 transitions. [2022-01-10 21:52:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 256 [2022-01-10 21:52:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:36,713 INFO L225 Difference]: With dead ends: 214416 [2022-01-10 21:52:36,713 INFO L226 Difference]: Without dead ends: 115033 [2022-01-10 21:52:36,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:36,764 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 619 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:36,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 118 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:52:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115033 states. [2022-01-10 21:52:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115033 to 111971. [2022-01-10 21:52:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111971 states, 111970 states have (on average 1.1377958381709385) internal successors, (127399), 111970 states have internal predecessors, (127399), 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 21:52:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111971 states to 111971 states and 127399 transitions. [2022-01-10 21:52:38,097 INFO L78 Accepts]: Start accepts. Automaton has 111971 states and 127399 transitions. Word has length 256 [2022-01-10 21:52:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:38,097 INFO L470 AbstractCegarLoop]: Abstraction has 111971 states and 127399 transitions. [2022-01-10 21:52:38,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 3 states have internal predecessors, (206), 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 21:52:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 111971 states and 127399 transitions. [2022-01-10 21:52:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-10 21:52:38,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:38,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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] [2022-01-10 21:52:38,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:52:38,122 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash -746820628, now seen corresponding path program 1 times [2022-01-10 21:52:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948662375] [2022-01-10 21:52:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:38,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:38,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948662375] [2022-01-10 21:52:38,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948662375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:52:38,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869691233] [2022-01-10 21:52:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:38,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:52:38,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:52:38,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:52:38,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:52:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 7368 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 21:52:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:52:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:39,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:52:39,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869691233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:39,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:52:39,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:52:39,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910481817] [2022-01-10 21:52:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:39,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:39,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:39,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:52:39,975 INFO L87 Difference]: Start difference. First operand 111971 states and 127399 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 21:52:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:41,379 INFO L93 Difference]: Finished difference Result 232273 states and 263921 transitions. [2022-01-10 21:52:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 258 [2022-01-10 21:52:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:41,538 INFO L225 Difference]: With dead ends: 232273 [2022-01-10 21:52:41,538 INFO L226 Difference]: Without dead ends: 120304 [2022-01-10 21:52:41,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:52:41,603 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 147 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:41,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 127 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:52:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120304 states. [2022-01-10 21:52:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120304 to 120091. [2022-01-10 21:52:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120091 states, 120090 states have (on average 1.1335248563577316) internal successors, (136125), 120090 states have internal predecessors, (136125), 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 21:52:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120091 states to 120091 states and 136125 transitions. [2022-01-10 21:52:43,121 INFO L78 Accepts]: Start accepts. Automaton has 120091 states and 136125 transitions. Word has length 258 [2022-01-10 21:52:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:43,121 INFO L470 AbstractCegarLoop]: Abstraction has 120091 states and 136125 transitions. [2022-01-10 21:52:43,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 21:52:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 120091 states and 136125 transitions. [2022-01-10 21:52:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-10 21:52:43,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:43,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:52:43,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 21:52:43,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 21:52:43,576 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1013719769, now seen corresponding path program 1 times [2022-01-10 21:52:43,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430843954] [2022-01-10 21:52:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:43,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 21:52:43,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:43,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430843954] [2022-01-10 21:52:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430843954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:43,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:43,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398926393] [2022-01-10 21:52:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:43,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:43,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:43,711 INFO L87 Difference]: Start difference. First operand 120091 states and 136125 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 21:52:45,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:45,758 INFO L93 Difference]: Finished difference Result 349528 states and 397012 transitions. [2022-01-10 21:52:45,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 260 [2022-01-10 21:52:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:46,118 INFO L225 Difference]: With dead ends: 349528 [2022-01-10 21:52:46,119 INFO L226 Difference]: Without dead ends: 229439 [2022-01-10 21:52:46,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:46,392 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 483 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:46,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 330 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:52:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229439 states. [2022-01-10 21:52:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229439 to 188993. [2022-01-10 21:52:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188993 states, 188992 states have (on average 1.1336088300033864) internal successors, (214243), 188992 states have internal predecessors, (214243), 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 21:52:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188993 states to 188993 states and 214243 transitions. [2022-01-10 21:52:49,053 INFO L78 Accepts]: Start accepts. Automaton has 188993 states and 214243 transitions. Word has length 260 [2022-01-10 21:52:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:49,053 INFO L470 AbstractCegarLoop]: Abstraction has 188993 states and 214243 transitions. [2022-01-10 21:52:49,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 21:52:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 188993 states and 214243 transitions. [2022-01-10 21:52:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-10 21:52:49,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:49,084 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 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, 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, 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] [2022-01-10 21:52:49,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:52:49,085 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1016189518, now seen corresponding path program 1 times [2022-01-10 21:52:49,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:49,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814372619] [2022-01-10 21:52:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:49,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:49,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814372619] [2022-01-10 21:52:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814372619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:49,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:49,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:52:49,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743101904] [2022-01-10 21:52:49,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:49,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:52:49,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:52:49,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:49,227 INFO L87 Difference]: Start difference. First operand 188993 states and 214243 transitions. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 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 21:52:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:51,555 INFO L93 Difference]: Finished difference Result 396328 states and 450264 transitions. [2022-01-10 21:52:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:52:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 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 290 [2022-01-10 21:52:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:52,109 INFO L225 Difference]: With dead ends: 396328 [2022-01-10 21:52:52,110 INFO L226 Difference]: Without dead ends: 207337 [2022-01-10 21:52:52,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:52:52,168 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 363 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:52,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 105 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:52:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207337 states. [2022-01-10 21:52:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207337 to 204451. [2022-01-10 21:52:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204451 states, 204450 states have (on average 1.128148691611641) internal successors, (230650), 204450 states have internal predecessors, (230650), 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 21:52:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204451 states to 204451 states and 230650 transitions. [2022-01-10 21:52:55,097 INFO L78 Accepts]: Start accepts. Automaton has 204451 states and 230650 transitions. Word has length 290 [2022-01-10 21:52:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:52:55,098 INFO L470 AbstractCegarLoop]: Abstraction has 204451 states and 230650 transitions. [2022-01-10 21:52:55,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 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 21:52:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 204451 states and 230650 transitions. [2022-01-10 21:52:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-10 21:52:55,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:52:55,141 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, 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, 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, 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, 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] [2022-01-10 21:52:55,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 21:52:55,142 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:52:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:52:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2138427296, now seen corresponding path program 1 times [2022-01-10 21:52:55,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:52:55,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409541074] [2022-01-10 21:52:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:52:55,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:52:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:52:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:52:55,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:52:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409541074] [2022-01-10 21:52:55,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409541074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:52:55,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:52:55,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:52:55,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473137918] [2022-01-10 21:52:55,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:52:55,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:52:55,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:52:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:52:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:52:55,602 INFO L87 Difference]: Start difference. First operand 204451 states and 230650 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 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 21:52:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:52:57,658 INFO L93 Difference]: Finished difference Result 426639 states and 481497 transitions. [2022-01-10 21:52:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:52:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 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 318 [2022-01-10 21:52:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:52:58,008 INFO L225 Difference]: With dead ends: 426639 [2022-01-10 21:52:58,008 INFO L226 Difference]: Without dead ends: 222190 [2022-01-10 21:52:58,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:52:58,105 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 87 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:52:58,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 110 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:52:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222190 states. [2022-01-10 21:53:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222190 to 214191. [2022-01-10 21:53:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214191 states, 214190 states have (on average 1.1173397450861384) internal successors, (239323), 214190 states have internal predecessors, (239323), 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 21:53:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214191 states to 214191 states and 239323 transitions. [2022-01-10 21:53:01,117 INFO L78 Accepts]: Start accepts. Automaton has 214191 states and 239323 transitions. Word has length 318 [2022-01-10 21:53:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:53:01,117 INFO L470 AbstractCegarLoop]: Abstraction has 214191 states and 239323 transitions. [2022-01-10 21:53:01,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 2 states have internal predecessors, (318), 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 21:53:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 214191 states and 239323 transitions. [2022-01-10 21:53:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-10 21:53:01,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:53:01,162 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 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, 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, 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] [2022-01-10 21:53:01,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:53:01,163 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:53:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:53:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1056232456, now seen corresponding path program 1 times [2022-01-10 21:53:01,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:53:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783947415] [2022-01-10 21:53:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:53:01,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:53:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:53:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:53:01,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:53:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783947415] [2022-01-10 21:53:01,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783947415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:53:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248004344] [2022-01-10 21:53:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:53:01,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:53:01,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:53:01,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:53:01,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 21:53:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:53:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 9449 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:53:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:53:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:53:03,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:53:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248004344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:53:03,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:53:03,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:53:03,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028609396] [2022-01-10 21:53:03,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:53:03,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:53:03,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:53:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:53:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:53:03,034 INFO L87 Difference]: Start difference. First operand 214191 states and 239323 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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 21:53:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:53:05,720 INFO L93 Difference]: Finished difference Result 524587 states and 591254 transitions. [2022-01-10 21:53:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:53:05,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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 325 [2022-01-10 21:53:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:53:06,456 INFO L225 Difference]: With dead ends: 524587 [2022-01-10 21:53:06,458 INFO L226 Difference]: Without dead ends: 310398 [2022-01-10 21:53:06,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:53:06,543 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 448 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:53:06,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 112 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:53:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310398 states.