/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_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:49:09,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:49:09,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:49:09,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:49:09,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:49:09,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:49:09,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:49:09,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:49:09,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:49:09,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:49:09,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:49:09,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:49:09,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:49:09,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:49:09,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:49:09,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:49:09,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:49:09,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:49:09,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:49:09,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:49:09,368 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 21:49:09,381 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:49:09,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:49:09,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:49:09,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:49:09,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:49:09,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:49:09,382 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:49:09,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:49:09,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:49:09,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:49:09,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:49:09,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:49:09,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:49:09,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:49:09,385 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:49:09,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:49:09,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:49:09,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:49:09,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:49:09,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:49:09,581 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:49:09,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label04.c [2022-01-10 21:49:09,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bcbeefc/537bc4f26b1d4b8391de57af2872cbd8/FLAG5ff4a8f87 [2022-01-10 21:49:10,113 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:49:10,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label04.c [2022-01-10 21:49:10,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bcbeefc/537bc4f26b1d4b8391de57af2872cbd8/FLAG5ff4a8f87 [2022-01-10 21:49:10,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9bcbeefc/537bc4f26b1d4b8391de57af2872cbd8 [2022-01-10 21:49:10,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:49:10,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:49:10,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:49:10,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:49:10,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:49:10,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:49:10" (1/1) ... [2022-01-10 21:49:10,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f9ae29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:10, skipping insertion in model container [2022-01-10 21:49:10,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:49:10" (1/1) ... [2022-01-10 21:49:10,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:49:10,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:49:10,982 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_label04.c[60959,60972] [2022-01-10 21:49:11,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:49:11,013 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:49:11,208 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_label04.c[60959,60972] [2022-01-10 21:49:11,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:49:11,230 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:49:11,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11 WrapperNode [2022-01-10 21:49:11,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:49:11,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:49:11,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:49:11,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:49:11,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,338 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:49:11,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:49:11,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:49:11,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:49:11,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:49:11,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:49:11,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:49:11,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:49:11,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:49:11,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (1/1) ... [2022-01-10 21:49:11,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:49:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:11,476 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 21:49:11,485 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 21:49:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:49:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:49:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:49:11,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:49:11,614 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:49:11,615 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:49:13,037 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:49:13,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:49:13,044 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:49:13,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:13 BoogieIcfgContainer [2022-01-10 21:49:13,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:49:13,046 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:49:13,047 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:49:13,047 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:49:13,049 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:13" (1/1) ... [2022-01-10 21:49:13,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:49:13 BasicIcfg [2022-01-10 21:49:13,364 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:49:13,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:49:13,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:49:13,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:49:13,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:49:10" (1/4) ... [2022-01-10 21:49:13,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567799e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:49:13, skipping insertion in model container [2022-01-10 21:49:13,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:11" (2/4) ... [2022-01-10 21:49:13,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567799e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:49:13, skipping insertion in model container [2022-01-10 21:49:13,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:13" (3/4) ... [2022-01-10 21:49:13,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567799e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:49:13, skipping insertion in model container [2022-01-10 21:49:13,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:49:13" (4/4) ... [2022-01-10 21:49:13,369 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label04.cTransformedIcfg [2022-01-10 21:49:13,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:49:13,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:49:13,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:49:13,419 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 21:49:13,419 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:49:13,438 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 21:49:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-10 21:49:13,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:13,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:13,459 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -158363303, now seen corresponding path program 1 times [2022-01-10 21:49:13,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861786312] [2022-01-10 21:49:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:13,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:14,008 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 21:49:14,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861786312] [2022-01-10 21:49:14,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861786312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:14,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:14,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:14,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444890045] [2022-01-10 21:49:14,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:14,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:14,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:14,042 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 66.0) internal successors, (198), 2 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 21:49:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:15,279 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2022-01-10 21:49:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 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 198 [2022-01-10 21:49:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:15,301 INFO L225 Difference]: With dead ends: 855 [2022-01-10 21:49:15,302 INFO L226 Difference]: Without dead ends: 460 [2022-01-10 21:49:15,305 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 21:49:15,308 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 98 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:15,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:49:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-10 21:49:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2022-01-10 21:49:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:49:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2022-01-10 21:49:15,351 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 198 [2022-01-10 21:49:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:15,351 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2022-01-10 21:49:15,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 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 21:49:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2022-01-10 21:49:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 21:49:15,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:15,354 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:15,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:49:15,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:15,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1432980221, now seen corresponding path program 1 times [2022-01-10 21:49:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18504996] [2022-01-10 21:49:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:15,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:15,477 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 21:49:15,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18504996] [2022-01-10 21:49:15,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18504996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:15,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:15,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:15,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147105724] [2022-01-10 21:49:15,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:15,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:15,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:15,480 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 21:49:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:15,816 INFO L93 Difference]: Finished difference Result 1356 states and 2104 transitions. [2022-01-10 21:49:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 21:49:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:15,819 INFO L225 Difference]: With dead ends: 1356 [2022-01-10 21:49:15,819 INFO L226 Difference]: Without dead ends: 899 [2022-01-10 21:49:15,820 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 21:49:15,821 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 21:49:15,822 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 21:49:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-10 21:49:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2022-01-10 21:49:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 1.5491071428571428) internal successors, (1388), 896 states have internal predecessors, (1388), 0 states have call successors, (0), 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 21:49:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1388 transitions. [2022-01-10 21:49:15,845 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1388 transitions. Word has length 203 [2022-01-10 21:49:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:15,845 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1388 transitions. [2022-01-10 21:49:15,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 21:49:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1388 transitions. [2022-01-10 21:49:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-10 21:49:15,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:15,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:15,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:49:15,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1260756285, now seen corresponding path program 1 times [2022-01-10 21:49:15,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:15,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727737131] [2022-01-10 21:49:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:15,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:16,022 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 21:49:16,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727737131] [2022-01-10 21:49:16,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727737131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:16,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:16,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:16,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617594798] [2022-01-10 21:49:16,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:16,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:16,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:16,024 INFO L87 Difference]: Start difference. First operand 897 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 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 21:49:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:16,904 INFO L93 Difference]: Finished difference Result 2647 states and 4116 transitions. [2022-01-10 21:49:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 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 206 [2022-01-10 21:49:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:16,910 INFO L225 Difference]: With dead ends: 2647 [2022-01-10 21:49:16,910 INFO L226 Difference]: Without dead ends: 1752 [2022-01-10 21:49:16,911 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 21:49:16,912 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:16,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 94 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-01-10 21:49:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1721. [2022-01-10 21:49:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 1.5162790697674418) internal successors, (2608), 1720 states have internal predecessors, (2608), 0 states have call successors, (0), 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 21:49:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2608 transitions. [2022-01-10 21:49:16,937 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2608 transitions. Word has length 206 [2022-01-10 21:49:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:16,938 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2608 transitions. [2022-01-10 21:49:16,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 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 21:49:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2608 transitions. [2022-01-10 21:49:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 21:49:16,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:16,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:16,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:49:16,942 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1120752037, now seen corresponding path program 1 times [2022-01-10 21:49:16,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622055695] [2022-01-10 21:49:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:16,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:17,225 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 21:49:17,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622055695] [2022-01-10 21:49:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622055695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:17,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:17,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:17,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647370734] [2022-01-10 21:49:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:17,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:17,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:17,227 INFO L87 Difference]: Start difference. First operand 1721 states and 2608 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 21:49:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:18,220 INFO L93 Difference]: Finished difference Result 3739 states and 5738 transitions. [2022-01-10 21:49:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:18,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 213 [2022-01-10 21:49:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:18,226 INFO L225 Difference]: With dead ends: 3739 [2022-01-10 21:49:18,226 INFO L226 Difference]: Without dead ends: 1672 [2022-01-10 21:49:18,228 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 21:49:18,228 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 331 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:18,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-01-10 21:49:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2022-01-10 21:49:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.3758228605625373) internal successors, (2299), 1671 states have internal predecessors, (2299), 0 states have call successors, (0), 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 21:49:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2299 transitions. [2022-01-10 21:49:18,253 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2299 transitions. Word has length 213 [2022-01-10 21:49:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:18,254 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2299 transitions. [2022-01-10 21:49:18,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 21:49:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2299 transitions. [2022-01-10 21:49:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 21:49:18,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:18,257 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:18,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:49:18,257 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 852230329, now seen corresponding path program 1 times [2022-01-10 21:49:18,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:18,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399049830] [2022-01-10 21:49:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:18,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:18,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399049830] [2022-01-10 21:49:18,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399049830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:18,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:18,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:18,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548016755] [2022-01-10 21:49:18,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:18,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:18,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:18,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:18,365 INFO L87 Difference]: Start difference. First operand 1672 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 21:49:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:19,109 INFO L93 Difference]: Finished difference Result 4970 states and 6839 transitions. [2022-01-10 21:49:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2022-01-10 21:49:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:19,118 INFO L225 Difference]: With dead ends: 4970 [2022-01-10 21:49:19,118 INFO L226 Difference]: Without dead ends: 3300 [2022-01-10 21:49:19,120 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 21:49:19,121 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 209 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 113 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 21:49:19,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 113 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:49:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2022-01-10 21:49:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 3296. [2022-01-10 21:49:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3295 states have (on average 1.2537177541729894) internal successors, (4131), 3295 states have internal predecessors, (4131), 0 states have call successors, (0), 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 21:49:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 4131 transitions. [2022-01-10 21:49:19,161 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 4131 transitions. Word has length 213 [2022-01-10 21:49:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:19,161 INFO L470 AbstractCegarLoop]: Abstraction has 3296 states and 4131 transitions. [2022-01-10 21:49:19,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 21:49:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 4131 transitions. [2022-01-10 21:49:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-10 21:49:19,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:19,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:19,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:49:19,165 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash -200513369, now seen corresponding path program 1 times [2022-01-10 21:49:19,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:19,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820078152] [2022-01-10 21:49:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:19,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:19,480 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 21:49:19,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:19,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820078152] [2022-01-10 21:49:19,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820078152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:19,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:19,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:19,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086844616] [2022-01-10 21:49:19,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:19,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:19,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:19,483 INFO L87 Difference]: Start difference. First operand 3296 states and 4131 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 21:49:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:20,567 INFO L93 Difference]: Finished difference Result 8406 states and 10498 transitions. [2022-01-10 21:49:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 229 [2022-01-10 21:49:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:20,579 INFO L225 Difference]: With dead ends: 8406 [2022-01-10 21:49:20,579 INFO L226 Difference]: Without dead ends: 4938 [2022-01-10 21:49:20,583 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 21:49:20,583 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 200 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:20,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 77 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-01-10 21:49:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4936. [2022-01-10 21:49:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4936 states, 4935 states have (on average 1.2374873353596758) internal successors, (6107), 4935 states have internal predecessors, (6107), 0 states have call successors, (0), 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 21:49:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4936 states to 4936 states and 6107 transitions. [2022-01-10 21:49:20,641 INFO L78 Accepts]: Start accepts. Automaton has 4936 states and 6107 transitions. Word has length 229 [2022-01-10 21:49:20,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:20,641 INFO L470 AbstractCegarLoop]: Abstraction has 4936 states and 6107 transitions. [2022-01-10 21:49:20,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 21:49:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4936 states and 6107 transitions. [2022-01-10 21:49:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-10 21:49:20,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:20,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:20,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:49:20,646 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash -912507073, now seen corresponding path program 1 times [2022-01-10 21:49:20,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:20,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920609962] [2022-01-10 21:49:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:20,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:20,803 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 21:49:20,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920609962] [2022-01-10 21:49:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920609962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:20,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:20,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:20,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576643621] [2022-01-10 21:49:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:20,805 INFO L87 Difference]: Start difference. First operand 4936 states and 6107 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 21:49:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:21,835 INFO L93 Difference]: Finished difference Result 16438 states and 20393 transitions. [2022-01-10 21:49:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:21,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 236 [2022-01-10 21:49:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:21,862 INFO L225 Difference]: With dead ends: 16438 [2022-01-10 21:49:21,862 INFO L226 Difference]: Without dead ends: 11504 [2022-01-10 21:49:21,869 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 21:49:21,870 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 504 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:21,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 440 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11504 states. [2022-01-10 21:49:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11504 to 11488. [2022-01-10 21:49:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11488 states, 11487 states have (on average 1.2320013928789066) internal successors, (14152), 11487 states have internal predecessors, (14152), 0 states have call successors, (0), 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 21:49:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11488 states to 11488 states and 14152 transitions. [2022-01-10 21:49:22,013 INFO L78 Accepts]: Start accepts. Automaton has 11488 states and 14152 transitions. Word has length 236 [2022-01-10 21:49:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:22,014 INFO L470 AbstractCegarLoop]: Abstraction has 11488 states and 14152 transitions. [2022-01-10 21:49:22,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 21:49:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11488 states and 14152 transitions. [2022-01-10 21:49:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-10 21:49:22,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:22,021 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, 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] [2022-01-10 21:49:22,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:49:22,021 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1093674320, now seen corresponding path program 1 times [2022-01-10 21:49:22,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:22,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332578264] [2022-01-10 21:49:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:22,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 21:49:22,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332578264] [2022-01-10 21:49:22,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332578264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:22,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:22,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:22,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308835529] [2022-01-10 21:49:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:22,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:22,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:22,190 INFO L87 Difference]: Start difference. First operand 11488 states and 14152 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 21:49:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:23,139 INFO L93 Difference]: Finished difference Result 27655 states and 34116 transitions. [2022-01-10 21:49:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 264 [2022-01-10 21:49:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:23,191 INFO L225 Difference]: With dead ends: 27655 [2022-01-10 21:49:23,191 INFO L226 Difference]: Without dead ends: 16169 [2022-01-10 21:49:23,226 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 21:49:23,227 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 491 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:23,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 304 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16169 states. [2022-01-10 21:49:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16169 to 16163. [2022-01-10 21:49:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16163 states, 16162 states have (on average 1.2237346863012004) internal successors, (19778), 16162 states have internal predecessors, (19778), 0 states have call successors, (0), 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 21:49:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16163 states to 16163 states and 19778 transitions. [2022-01-10 21:49:23,666 INFO L78 Accepts]: Start accepts. Automaton has 16163 states and 19778 transitions. Word has length 264 [2022-01-10 21:49:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:23,668 INFO L470 AbstractCegarLoop]: Abstraction has 16163 states and 19778 transitions. [2022-01-10 21:49:23,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 21:49:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 16163 states and 19778 transitions. [2022-01-10 21:49:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-10 21:49:23,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:23,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:23,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:49:23,679 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:23,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1266854230, now seen corresponding path program 1 times [2022-01-10 21:49:23,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980401120] [2022-01-10 21:49:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:23,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:23,906 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 21:49:23,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980401120] [2022-01-10 21:49:23,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980401120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:23,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:23,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:23,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901013542] [2022-01-10 21:49:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:23,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:23,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:23,908 INFO L87 Difference]: Start difference. First operand 16163 states and 19778 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:49:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:25,003 INFO L93 Difference]: Finished difference Result 59789 states and 72785 transitions. [2022-01-10 21:49:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2022-01-10 21:49:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:25,068 INFO L225 Difference]: With dead ends: 59789 [2022-01-10 21:49:25,068 INFO L226 Difference]: Without dead ends: 43628 [2022-01-10 21:49:25,083 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 21:49:25,083 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 481 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:25,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 326 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:49:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43628 states. [2022-01-10 21:49:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43628 to 43620. [2022-01-10 21:49:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43620 states, 43619 states have (on average 1.1935853641761618) internal successors, (52063), 43619 states have internal predecessors, (52063), 0 states have call successors, (0), 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 21:49:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43620 states to 43620 states and 52063 transitions. [2022-01-10 21:49:25,610 INFO L78 Accepts]: Start accepts. Automaton has 43620 states and 52063 transitions. Word has length 270 [2022-01-10 21:49:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:25,611 INFO L470 AbstractCegarLoop]: Abstraction has 43620 states and 52063 transitions. [2022-01-10 21:49:25,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:49:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 43620 states and 52063 transitions. [2022-01-10 21:49:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 21:49:25,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:25,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:49:25,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:49:25,627 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1725719573, now seen corresponding path program 1 times [2022-01-10 21:49:25,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972420575] [2022-01-10 21:49:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:25,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:25,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972420575] [2022-01-10 21:49:25,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972420575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:25,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:25,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:25,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456663861] [2022-01-10 21:49:25,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:25,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:25,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:25,944 INFO L87 Difference]: Start difference. First operand 43620 states and 52063 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 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 21:49:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:27,308 INFO L93 Difference]: Finished difference Result 119788 states and 142538 transitions. [2022-01-10 21:49:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 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 273 [2022-01-10 21:49:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:27,564 INFO L225 Difference]: With dead ends: 119788 [2022-01-10 21:49:27,564 INFO L226 Difference]: Without dead ends: 76170 [2022-01-10 21:49:27,623 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 21:49:27,624 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:27,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 146 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:49:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76170 states. [2022-01-10 21:49:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76170 to 76116. [2022-01-10 21:49:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76116 states, 76115 states have (on average 1.1834723773237863) internal successors, (90080), 76115 states have internal predecessors, (90080), 0 states have call successors, (0), 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 21:49:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76116 states to 76116 states and 90080 transitions. [2022-01-10 21:49:28,841 INFO L78 Accepts]: Start accepts. Automaton has 76116 states and 90080 transitions. Word has length 273 [2022-01-10 21:49:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:28,841 INFO L470 AbstractCegarLoop]: Abstraction has 76116 states and 90080 transitions. [2022-01-10 21:49:28,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 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 21:49:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 76116 states and 90080 transitions. [2022-01-10 21:49:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-10 21:49:28,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:28,880 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, 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] [2022-01-10 21:49:28,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:49:28,881 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1983760893, now seen corresponding path program 1 times [2022-01-10 21:49:28,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:28,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656815692] [2022-01-10 21:49:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:28,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 81 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 21:49:29,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656815692] [2022-01-10 21:49:29,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656815692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405803270] [2022-01-10 21:49:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:29,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:29,041 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 21:49:29,060 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 21:49:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:29,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 7698 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:49:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 21:49:30,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:30,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405803270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:30,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:30,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:30,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712176924] [2022-01-10 21:49:30,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:30,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:30,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:30,383 INFO L87 Difference]: Start difference. First operand 76116 states and 90080 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 21:49:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:31,627 INFO L93 Difference]: Finished difference Result 190650 states and 225085 transitions. [2022-01-10 21:49:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 274 [2022-01-10 21:49:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:31,811 INFO L225 Difference]: With dead ends: 190650 [2022-01-10 21:49:31,811 INFO L226 Difference]: Without dead ends: 114536 [2022-01-10 21:49:31,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 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 21:49:31,858 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:31,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 346 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:49:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114536 states. [2022-01-10 21:49:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114536 to 114313. [2022-01-10 21:49:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114313 states, 114312 states have (on average 1.1592396248862762) internal successors, (132515), 114312 states have internal predecessors, (132515), 0 states have call successors, (0), 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 21:49:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114313 states to 114313 states and 132515 transitions. [2022-01-10 21:49:33,709 INFO L78 Accepts]: Start accepts. Automaton has 114313 states and 132515 transitions. Word has length 274 [2022-01-10 21:49:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:33,709 INFO L470 AbstractCegarLoop]: Abstraction has 114313 states and 132515 transitions. [2022-01-10 21:49:33,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 21:49:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 114313 states and 132515 transitions. [2022-01-10 21:49:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-10 21:49:33,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:33,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:49:33,761 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 21:49:33,955 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,SelfDestructingSolverStorable10 [2022-01-10 21:49:33,956 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2080090159, now seen corresponding path program 1 times [2022-01-10 21:49:33,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:33,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943717906] [2022-01-10 21:49:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:33,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:34,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943717906] [2022-01-10 21:49:34,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943717906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:34,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774222883] [2022-01-10 21:49:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:34,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:34,262 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 21:49:34,279 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 21:49:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:34,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 7811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:49:34,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:35,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:35,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774222883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:35,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:35,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:35,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700510629] [2022-01-10 21:49:35,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:35,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:35,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:35,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:35,428 INFO L87 Difference]: Start difference. First operand 114313 states and 132515 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 21:49:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:36,856 INFO L93 Difference]: Finished difference Result 228634 states and 265047 transitions. [2022-01-10 21:49:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:36,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 278 [2022-01-10 21:49:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:37,048 INFO L225 Difference]: With dead ends: 228634 [2022-01-10 21:49:37,049 INFO L226 Difference]: Without dead ends: 114323 [2022-01-10 21:49:37,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 277 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 21:49:37,109 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 65 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:37,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114323 states. [2022-01-10 21:49:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114323 to 111877. [2022-01-10 21:49:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111877 states, 111876 states have (on average 1.149424362687261) internal successors, (128593), 111876 states have internal predecessors, (128593), 0 states have call successors, (0), 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 21:49:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111877 states to 111877 states and 128593 transitions. [2022-01-10 21:49:38,717 INFO L78 Accepts]: Start accepts. Automaton has 111877 states and 128593 transitions. Word has length 278 [2022-01-10 21:49:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:38,718 INFO L470 AbstractCegarLoop]: Abstraction has 111877 states and 128593 transitions. [2022-01-10 21:49:38,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 21:49:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 111877 states and 128593 transitions. [2022-01-10 21:49:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-10 21:49:38,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:38,752 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:49:38,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 21:49:38,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 21:49:38,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2060245538, now seen corresponding path program 1 times [2022-01-10 21:49:38,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:38,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245092888] [2022-01-10 21:49:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:38,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:39,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:39,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245092888] [2022-01-10 21:49:39,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245092888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:39,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:39,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:39,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727569828] [2022-01-10 21:49:39,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:39,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:39,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:39,438 INFO L87 Difference]: Start difference. First operand 111877 states and 128593 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 21:49:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:40,931 INFO L93 Difference]: Finished difference Result 226423 states and 260176 transitions. [2022-01-10 21:49:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 306 [2022-01-10 21:49:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:41,088 INFO L225 Difference]: With dead ends: 226423 [2022-01-10 21:49:41,089 INFO L226 Difference]: Without dead ends: 114548 [2022-01-10 21:49:41,309 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 21:49:41,311 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 586 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:41,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 280 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114548 states. [2022-01-10 21:49:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114548 to 106599. [2022-01-10 21:49:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106599 states, 106598 states have (on average 1.1526107431659132) internal successors, (122866), 106598 states have internal predecessors, (122866), 0 states have call successors, (0), 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 21:49:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106599 states to 106599 states and 122866 transitions. [2022-01-10 21:49:42,725 INFO L78 Accepts]: Start accepts. Automaton has 106599 states and 122866 transitions. Word has length 306 [2022-01-10 21:49:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:42,726 INFO L470 AbstractCegarLoop]: Abstraction has 106599 states and 122866 transitions. [2022-01-10 21:49:42,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 21:49:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 106599 states and 122866 transitions. [2022-01-10 21:49:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-10 21:49:42,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:42,764 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:49:42,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:49:42,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -734877624, now seen corresponding path program 1 times [2022-01-10 21:49:42,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:42,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608663092] [2022-01-10 21:49:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:42,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 21:49:43,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608663092] [2022-01-10 21:49:43,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608663092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:43,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:43,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:43,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518316986] [2022-01-10 21:49:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:43,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:43,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:43,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:43,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:43,202 INFO L87 Difference]: Start difference. First operand 106599 states and 122866 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 21:49:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:44,581 INFO L93 Difference]: Finished difference Result 210598 states and 242910 transitions. [2022-01-10 21:49:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 329 [2022-01-10 21:49:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:44,738 INFO L225 Difference]: With dead ends: 210598 [2022-01-10 21:49:44,739 INFO L226 Difference]: Without dead ends: 104001 [2022-01-10 21:49:44,792 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 21:49:44,792 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 204 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:44,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 328 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104001 states. [2022-01-10 21:49:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104001 to 103530. [2022-01-10 21:49:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103530 states, 103529 states have (on average 1.145331259840238) internal successors, (118575), 103529 states have internal predecessors, (118575), 0 states have call successors, (0), 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 21:49:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103530 states to 103530 states and 118575 transitions. [2022-01-10 21:49:46,393 INFO L78 Accepts]: Start accepts. Automaton has 103530 states and 118575 transitions. Word has length 329 [2022-01-10 21:49:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:46,393 INFO L470 AbstractCegarLoop]: Abstraction has 103530 states and 118575 transitions. [2022-01-10 21:49:46,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 21:49:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 103530 states and 118575 transitions. [2022-01-10 21:49:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-10 21:49:46,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:46,433 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 21:49:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:49:46,433 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -291977499, now seen corresponding path program 1 times [2022-01-10 21:49:46,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:46,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563401933] [2022-01-10 21:49:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:46,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 154 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-10 21:49:46,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:46,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563401933] [2022-01-10 21:49:46,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563401933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337448545] [2022-01-10 21:49:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:46,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:46,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:49:46,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 21:49:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 10140 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:49:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-01-10 21:49:48,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:48,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337448545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:48,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:48,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:48,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056120994] [2022-01-10 21:49:48,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:48,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:48,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:48,166 INFO L87 Difference]: Start difference. First operand 103530 states and 118575 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 21:49:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:49,451 INFO L93 Difference]: Finished difference Result 235488 states and 267602 transitions. [2022-01-10 21:49:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:49,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 354 [2022-01-10 21:49:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:49,625 INFO L225 Difference]: With dead ends: 235488 [2022-01-10 21:49:49,626 INFO L226 Difference]: Without dead ends: 131960 [2022-01-10 21:49:49,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 353 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 21:49:49,703 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 70 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:49,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 44 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 21:49:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131960 states. [2022-01-10 21:49:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131960 to 120582. [2022-01-10 21:49:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120582 states, 120581 states have (on average 1.135502276478052) internal successors, (136920), 120581 states have internal predecessors, (136920), 0 states have call successors, (0), 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 21:49:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120582 states to 120582 states and 136920 transitions. [2022-01-10 21:49:51,705 INFO L78 Accepts]: Start accepts. Automaton has 120582 states and 136920 transitions. Word has length 354 [2022-01-10 21:49:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:51,719 INFO L470 AbstractCegarLoop]: Abstraction has 120582 states and 136920 transitions. [2022-01-10 21:49:51,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 21:49:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 120582 states and 136920 transitions. [2022-01-10 21:49:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-01-10 21:49:51,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:51,814 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:49:51,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 21:49:52,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:52,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1381168225, now seen corresponding path program 1 times [2022-01-10 21:49:52,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:52,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141899503] [2022-01-10 21:49:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:52,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 154 proven. 6 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 21:49:52,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:52,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141899503] [2022-01-10 21:49:52,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141899503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:52,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414479782] [2022-01-10 21:49:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:52,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:52,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:52,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:49:52,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 21:49:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 10325 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:49:53,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:53,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:53,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414479782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:53,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:53,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:53,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44371523] [2022-01-10 21:49:53,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:53,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:53,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:53,807 INFO L87 Difference]: Start difference. First operand 120582 states and 136920 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 21:49:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:55,107 INFO L93 Difference]: Finished difference Result 216764 states and 246324 transitions. [2022-01-10 21:49:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 360 [2022-01-10 21:49:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:55,269 INFO L225 Difference]: With dead ends: 216764 [2022-01-10 21:49:55,269 INFO L226 Difference]: Without dead ends: 96184 [2022-01-10 21:49:55,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 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 21:49:55,339 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 160 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:55,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 312 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:49:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96184 states. [2022-01-10 21:49:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96184 to 92522. [2022-01-10 21:49:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92522 states, 92521 states have (on average 1.1159628624852735) internal successors, (103250), 92521 states have internal predecessors, (103250), 0 states have call successors, (0), 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 21:49:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92522 states to 92522 states and 103250 transitions. [2022-01-10 21:49:56,705 INFO L78 Accepts]: Start accepts. Automaton has 92522 states and 103250 transitions. Word has length 360 [2022-01-10 21:49:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:56,705 INFO L470 AbstractCegarLoop]: Abstraction has 92522 states and 103250 transitions. [2022-01-10 21:49:56,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 21:49:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 92522 states and 103250 transitions. [2022-01-10 21:49:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-10 21:49:56,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:56,743 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:49:56,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 21:49:56,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-10 21:49:56,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1434257445, now seen corresponding path program 1 times [2022-01-10 21:49:56,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239826746] [2022-01-10 21:49:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:56,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-10 21:49:57,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239826746] [2022-01-10 21:49:57,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239826746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:57,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:57,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:57,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672870950] [2022-01-10 21:49:57,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:57,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:57,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:57,349 INFO L87 Difference]: Start difference. First operand 92522 states and 103250 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 21:49:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:58,602 INFO L93 Difference]: Finished difference Result 256573 states and 286189 transitions. [2022-01-10 21:49:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:58,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 366 [2022-01-10 21:49:58,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:58,853 INFO L225 Difference]: With dead ends: 256573 [2022-01-10 21:49:58,854 INFO L226 Difference]: Without dead ends: 164053 [2022-01-10 21:49:58,900 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 21:49:58,900 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 272 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:58,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 768 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 21:49:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164053 states. [2022-01-10 21:50:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164053 to 161208. [2022-01-10 21:50:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161208 states, 161207 states have (on average 1.1061430334911015) internal successors, (178318), 161207 states have internal predecessors, (178318), 0 states have call successors, (0), 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 21:50:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161208 states to 161208 states and 178318 transitions. [2022-01-10 21:50:01,368 INFO L78 Accepts]: Start accepts. Automaton has 161208 states and 178318 transitions. Word has length 366 [2022-01-10 21:50:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:01,368 INFO L470 AbstractCegarLoop]: Abstraction has 161208 states and 178318 transitions. [2022-01-10 21:50:01,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 21:50:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 161208 states and 178318 transitions. [2022-01-10 21:50:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-01-10 21:50:01,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:01,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:50:01,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:50:01,442 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:01,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1376700799, now seen corresponding path program 1 times [2022-01-10 21:50:01,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:01,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23231285] [2022-01-10 21:50:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:01,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-10 21:50:01,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:01,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23231285] [2022-01-10 21:50:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23231285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:01,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:01,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:01,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067646788] [2022-01-10 21:50:01,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:01,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:01,740 INFO L87 Difference]: Start difference. First operand 161208 states and 178318 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 21:50:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:04,653 INFO L93 Difference]: Finished difference Result 478947 states and 529702 transitions. [2022-01-10 21:50:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 372 [2022-01-10 21:50:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:05,220 INFO L225 Difference]: With dead ends: 478947 [2022-01-10 21:50:05,221 INFO L226 Difference]: Without dead ends: 317741 [2022-01-10 21:50:05,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:50:05,406 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 435 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:05,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 355 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317741 states. [2022-01-10 21:50:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317741 to 317728. [2022-01-10 21:50:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317728 states, 317727 states have (on average 1.1050335665524176) internal successors, (351099), 317727 states have internal predecessors, (351099), 0 states have call successors, (0), 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 21:50:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317728 states to 317728 states and 351099 transitions. [2022-01-10 21:50:10,908 INFO L78 Accepts]: Start accepts. Automaton has 317728 states and 351099 transitions. Word has length 372 [2022-01-10 21:50:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:10,908 INFO L470 AbstractCegarLoop]: Abstraction has 317728 states and 351099 transitions. [2022-01-10 21:50:10,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 21:50:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 317728 states and 351099 transitions. [2022-01-10 21:50:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-10 21:50:11,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:11,007 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:50:11,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 21:50:11,007 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 695545345, now seen corresponding path program 1 times [2022-01-10 21:50:11,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:11,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806859371] [2022-01-10 21:50:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:11,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-01-10 21:50:11,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806859371] [2022-01-10 21:50:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806859371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:11,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:11,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:11,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717290563] [2022-01-10 21:50:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:11,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:11,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:11,238 INFO L87 Difference]: Start difference. First operand 317728 states and 351099 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)