/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/array-multidimensional/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:25:12,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:25:12,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:25:12,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:25:12,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:25:12,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:25:12,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:25:12,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:25:12,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:25:12,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:25:12,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:25:12,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:25:12,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:25:12,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:25:12,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:25:12,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:25:12,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:25:12,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:25:12,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:25:12,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:25:12,456 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 21:25:12,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:25:12,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:25:12,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:25:12,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:25:12,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:25:12,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:25:12,476 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:25:12,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:25:12,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:25:12,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:25:12,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:25:12,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:25:12,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:25:12,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:25:12,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:25:12,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:25:12,480 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:25:12,480 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:25:12,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:25:12,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:25:12,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:25:12,652 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:25:12,654 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:25:12,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2022-01-10 21:25:12,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1600de8/a614ad222a0142d3b3c5c10bcaf0b7e0/FLAG79500d512 [2022-01-10 21:25:13,072 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:25:13,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2022-01-10 21:25:13,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1600de8/a614ad222a0142d3b3c5c10bcaf0b7e0/FLAG79500d512 [2022-01-10 21:25:13,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1600de8/a614ad222a0142d3b3c5c10bcaf0b7e0 [2022-01-10 21:25:13,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:25:13,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:25:13,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:25:13,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:25:13,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:25:13,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c65f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13, skipping insertion in model container [2022-01-10 21:25:13,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:25:13,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:25:13,223 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c[414,427] [2022-01-10 21:25:13,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:25:13,263 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:25:13,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c[414,427] [2022-01-10 21:25:13,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:25:13,305 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:25:13,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13 WrapperNode [2022-01-10 21:25:13,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:25:13,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:25:13,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:25:13,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:25:13,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,341 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 131 [2022-01-10 21:25:13,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:25:13,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:25:13,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:25:13,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:25:13,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:25:13,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:25:13,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:25:13,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:25:13,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (1/1) ... [2022-01-10 21:25:13,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:25:13,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:13,385 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 21:25:13,404 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 21:25:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:25:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:25:13,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:25:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:25:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:25:13,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:25:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:25:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:25:13,461 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:25:13,462 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:25:14,352 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:25:14,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:25:14,357 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2022-01-10 21:25:14,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:25:14 BoogieIcfgContainer [2022-01-10 21:25:14,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:25:14,359 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:25:14,359 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:25:14,362 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:25:14,364 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:25:14" (1/1) ... [2022-01-10 21:25:14,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:25:14 BasicIcfg [2022-01-10 21:25:14,513 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:25:14,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:25:14,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:25:14,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:25:14,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:25:13" (1/4) ... [2022-01-10 21:25:14,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70532800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:25:14, skipping insertion in model container [2022-01-10 21:25:14,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:25:13" (2/4) ... [2022-01-10 21:25:14,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70532800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:25:14, skipping insertion in model container [2022-01-10 21:25:14,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:25:14" (3/4) ... [2022-01-10 21:25:14,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70532800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:25:14, skipping insertion in model container [2022-01-10 21:25:14,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:25:14" (4/4) ... [2022-01-10 21:25:14,519 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.cTransformedIcfg [2022-01-10 21:25:14,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:25:14,526 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:25:14,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:25:14,565 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 21:25:14,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:25:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 21:25:14,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:14,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:14,577 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1761543725, now seen corresponding path program 1 times [2022-01-10 21:25:14,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68100406] [2022-01-10 21:25:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:14,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:14,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:14,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196944688] [2022-01-10 21:25:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:14,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:14,668 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 21:25:14,669 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 21:25:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:14,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 21:25:14,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:14,833 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 21:25:14,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:14,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68100406] [2022-01-10 21:25:14,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:14,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196944688] [2022-01-10 21:25:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196944688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:14,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:14,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:25:14,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597940666] [2022-01-10 21:25:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:14,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:25:14,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:25:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:25:14,862 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 21:25:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:14,882 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2022-01-10 21:25:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:25:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 21:25:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:14,888 INFO L225 Difference]: With dead ends: 67 [2022-01-10 21:25:14,888 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 21:25:14,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:25:14,892 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:14,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:25:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 21:25:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-10 21:25:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-01-10 21:25:14,917 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2022-01-10 21:25:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:14,917 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-01-10 21:25:14,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 21:25:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-01-10 21:25:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 21:25:14,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:14,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:14,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:15,135 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,SelfDestructingSolverStorable0 [2022-01-10 21:25:15,136 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1248761423, now seen corresponding path program 1 times [2022-01-10 21:25:15,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:15,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202962732] [2022-01-10 21:25:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:15,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:15,171 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:15,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433054333] [2022-01-10 21:25:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:15,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:15,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:15,180 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 21:25:15,203 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 21:25:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:15,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:25:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:15,485 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 21:25:15,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:15,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202962732] [2022-01-10 21:25:15,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433054333] [2022-01-10 21:25:15,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433054333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:15,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:15,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:25:15,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877913995] [2022-01-10 21:25:15,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:15,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:25:15,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:15,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:25:15,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:15,494 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 21:25:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:16,220 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2022-01-10 21:25:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 21:25:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 21:25:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:16,223 INFO L225 Difference]: With dead ends: 80 [2022-01-10 21:25:16,223 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 21:25:16,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:16,224 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:16,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 72 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:25:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 21:25:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2022-01-10 21:25:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-01-10 21:25:16,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2022-01-10 21:25:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:16,228 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-01-10 21:25:16,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 21:25:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-01-10 21:25:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 21:25:16,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:16,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:16,245 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 21:25:16,439 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,SelfDestructingSolverStorable1 [2022-01-10 21:25:16,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1401673769, now seen corresponding path program 1 times [2022-01-10 21:25:16,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215934107] [2022-01-10 21:25:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:16,454 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:16,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429063530] [2022-01-10 21:25:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:16,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:16,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:16,456 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 21:25:16,457 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 21:25:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:25:16,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:25:16,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:16,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215934107] [2022-01-10 21:25:16,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429063530] [2022-01-10 21:25:16,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429063530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:16,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:16,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:25:16,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954351772] [2022-01-10 21:25:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:16,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:25:16,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:25:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:25:16,575 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:18,770 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2022-01-10 21:25:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:25:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 21:25:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:18,776 INFO L225 Difference]: With dead ends: 88 [2022-01-10 21:25:18,776 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 21:25:18,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:18,777 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:18,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 21:25:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 21:25:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2022-01-10 21:25:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-01-10 21:25:18,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 18 [2022-01-10 21:25:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:18,781 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-01-10 21:25:18,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-01-10 21:25:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 21:25:18,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:18,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:18,825 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 21:25:18,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:18,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1142473662, now seen corresponding path program 1 times [2022-01-10 21:25:19,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:19,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521243674] [2022-01-10 21:25:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:19,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:19,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18617337] [2022-01-10 21:25:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:19,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:19,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:19,024 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 21:25:19,026 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 21:25:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:25:19,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:25:19,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:19,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521243674] [2022-01-10 21:25:19,173 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18617337] [2022-01-10 21:25:19,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18617337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:19,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:19,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:25:19,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782882110] [2022-01-10 21:25:19,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:19,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:25:19,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:19,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:25:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:19,176 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:19,775 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2022-01-10 21:25:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 21:25:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 21:25:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:19,776 INFO L225 Difference]: With dead ends: 115 [2022-01-10 21:25:19,776 INFO L226 Difference]: Without dead ends: 86 [2022-01-10 21:25:19,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:25:19,777 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:19,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 45 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 21:25:19,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-10 21:25:19,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 37. [2022-01-10 21:25:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-10 21:25:19,782 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 21 [2022-01-10 21:25:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:19,782 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-10 21:25:19,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-10 21:25:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 21:25:19,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:19,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:19,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:19,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:19,995 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2054915626, now seen corresponding path program 1 times [2022-01-10 21:25:19,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114443348] [2022-01-10 21:25:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:19,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:20,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:20,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362146547] [2022-01-10 21:25:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:20,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:20,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:20,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:20,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 21:25:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 21:25:20,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:25:20,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:25:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:25:20,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114443348] [2022-01-10 21:25:20,506 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362146547] [2022-01-10 21:25:20,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362146547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:25:20,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:25:20,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2022-01-10 21:25:20,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74198675] [2022-01-10 21:25:20,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:25:20,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 21:25:20,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:20,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 21:25:20,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-01-10 21:25:20,507 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:24,527 INFO L93 Difference]: Finished difference Result 166 states and 227 transitions. [2022-01-10 21:25:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 21:25:24,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 21:25:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:24,529 INFO L225 Difference]: With dead ends: 166 [2022-01-10 21:25:24,529 INFO L226 Difference]: Without dead ends: 135 [2022-01-10 21:25:24,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-01-10 21:25:24,530 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 341 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:24,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 84 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-10 21:25:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-10 21:25:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 60. [2022-01-10 21:25:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 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 21:25:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2022-01-10 21:25:24,547 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 22 [2022-01-10 21:25:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:24,547 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2022-01-10 21:25:24,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2022-01-10 21:25:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 21:25:24,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:24,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:24,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:24,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:24,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash -230601022, now seen corresponding path program 2 times [2022-01-10 21:25:24,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:24,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693298641] [2022-01-10 21:25:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:24,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:24,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:24,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350963794] [2022-01-10 21:25:24,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:25:24,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:24,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:24,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 21:25:24,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 21:25:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:25:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 21:25:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 21:25:25,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:25,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:25,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693298641] [2022-01-10 21:25:25,051 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:25,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350963794] [2022-01-10 21:25:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350963794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:25,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:25,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:25:25,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271528872] [2022-01-10 21:25:25,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:25,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:25:25,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:25:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:25:25,052 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:27,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-10 21:25:29,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-10 21:25:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:29,277 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2022-01-10 21:25:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:25:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-10 21:25:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:29,278 INFO L225 Difference]: With dead ends: 123 [2022-01-10 21:25:29,278 INFO L226 Difference]: Without dead ends: 95 [2022-01-10 21:25:29,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 21:25:29,279 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:29,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 40 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-01-10 21:25:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-10 21:25:29,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2022-01-10 21:25:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.35) internal successors, (81), 60 states have internal predecessors, (81), 0 states have call successors, (0), 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 21:25:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2022-01-10 21:25:29,302 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 29 [2022-01-10 21:25:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:29,302 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2022-01-10 21:25:29,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2022-01-10 21:25:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 21:25:29,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:29,303 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:29,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:29,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:29,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash -104185918, now seen corresponding path program 1 times [2022-01-10 21:25:29,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:29,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438579917] [2022-01-10 21:25:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:29,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:29,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019499941] [2022-01-10 21:25:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:29,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:29,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:29,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 21:25:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:25:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 21:25:29,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:25:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 21:25:29,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:29,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438579917] [2022-01-10 21:25:29,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:29,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019499941] [2022-01-10 21:25:29,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019499941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:25:29,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:25:29,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-01-10 21:25:29,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791103134] [2022-01-10 21:25:29,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:25:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:25:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:25:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:25:29,849 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:30,880 INFO L93 Difference]: Finished difference Result 195 states and 262 transitions. [2022-01-10 21:25:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 21:25:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-10 21:25:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:30,881 INFO L225 Difference]: With dead ends: 195 [2022-01-10 21:25:30,881 INFO L226 Difference]: Without dead ends: 147 [2022-01-10 21:25:30,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-01-10 21:25:30,885 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 292 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 37 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:25:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-10 21:25:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 64. [2022-01-10 21:25:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 0 states have call successors, (0), 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 21:25:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2022-01-10 21:25:30,910 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 32 [2022-01-10 21:25:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:30,910 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2022-01-10 21:25:30,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2022-01-10 21:25:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 21:25:30,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:30,919 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:30,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-10 21:25:31,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:31,135 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1127530374, now seen corresponding path program 2 times [2022-01-10 21:25:31,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:31,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950334515] [2022-01-10 21:25:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:31,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:31,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:31,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342354938] [2022-01-10 21:25:31,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:25:31,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:31,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:31,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:31,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 21:25:31,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 21:25:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:25:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 21:25:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 21:25:31,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:31,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:31,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950334515] [2022-01-10 21:25:31,551 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:31,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342354938] [2022-01-10 21:25:31,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342354938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:31,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:31,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:25:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201173745] [2022-01-10 21:25:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:25:31,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:25:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:31,552 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 21:25:34,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-10 21:25:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:34,161 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2022-01-10 21:25:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 21:25:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 41 [2022-01-10 21:25:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:34,162 INFO L225 Difference]: With dead ends: 90 [2022-01-10 21:25:34,162 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 21:25:34,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:25:34,163 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:34,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 21:25:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 21:25:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-01-10 21:25:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.328125) internal successors, (85), 64 states have internal predecessors, (85), 0 states have call successors, (0), 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 21:25:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2022-01-10 21:25:34,175 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 41 [2022-01-10 21:25:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:34,175 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2022-01-10 21:25:34,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 21:25:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2022-01-10 21:25:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 21:25:34,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:34,175 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:25:34,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:34,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-10 21:25:34,392 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 833488010, now seen corresponding path program 1 times [2022-01-10 21:25:34,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017063099] [2022-01-10 21:25:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:34,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:34,407 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312042050] [2022-01-10 21:25:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:34,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:34,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:34,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:34,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 21:25:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:34,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 21:25:34,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 21:25:34,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:34,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017063099] [2022-01-10 21:25:34,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312042050] [2022-01-10 21:25:34,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312042050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:34,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:34,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:25:34,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253098312] [2022-01-10 21:25:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:34,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:25:34,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:25:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:25:34,688 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:35,273 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2022-01-10 21:25:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:25:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-10 21:25:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:35,274 INFO L225 Difference]: With dead ends: 110 [2022-01-10 21:25:35,274 INFO L226 Difference]: Without dead ends: 75 [2022-01-10 21:25:35,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:35,276 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:35,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 21:25:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-10 21:25:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2022-01-10 21:25:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.323076923076923) internal successors, (86), 65 states have internal predecessors, (86), 0 states have call successors, (0), 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 21:25:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-01-10 21:25:35,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 44 [2022-01-10 21:25:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:35,287 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-01-10 21:25:35,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:35,287 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-01-10 21:25:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 21:25:35,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:35,288 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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 21:25:35,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:35,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:35,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1781237490, now seen corresponding path program 1 times [2022-01-10 21:25:35,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:35,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043288878] [2022-01-10 21:25:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:35,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:35,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176508431] [2022-01-10 21:25:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:35,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:35,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:35,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:35,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 21:25:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:35,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 21:25:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 21:25:35,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:35,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043288878] [2022-01-10 21:25:35,713 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176508431] [2022-01-10 21:25:35,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176508431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:35,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:35,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:25:35,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426377444] [2022-01-10 21:25:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:35,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:25:35,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:25:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:35,714 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:37,535 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2022-01-10 21:25:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 21:25:37,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 21:25:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:37,536 INFO L225 Difference]: With dead ends: 125 [2022-01-10 21:25:37,536 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 21:25:37,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:25:37,537 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:37,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 64 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 21:25:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 21:25:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2022-01-10 21:25:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 66 states have internal predecessors, (87), 0 states have call successors, (0), 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 21:25:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2022-01-10 21:25:37,548 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 47 [2022-01-10 21:25:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:37,549 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2022-01-10 21:25:37,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2022-01-10 21:25:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 21:25:37,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:37,549 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 1, 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 21:25:37,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:37,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 21:25:37,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash -764480904, now seen corresponding path program 1 times [2022-01-10 21:25:37,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190829686] [2022-01-10 21:25:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:37,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:37,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:37,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596127826] [2022-01-10 21:25:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:37,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:37,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:37,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 21:25:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:25:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 21:25:38,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:25:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 21:25:38,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:38,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190829686] [2022-01-10 21:25:38,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:38,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596127826] [2022-01-10 21:25:38,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596127826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:25:38,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:25:38,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 21:25:38,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330451668] [2022-01-10 21:25:38,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:25:38,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 21:25:38,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 21:25:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 21:25:38,381 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 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 21:25:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:42,241 INFO L93 Difference]: Finished difference Result 232 states and 300 transitions. [2022-01-10 21:25:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 21:25:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 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 48 [2022-01-10 21:25:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:42,243 INFO L225 Difference]: With dead ends: 232 [2022-01-10 21:25:42,243 INFO L226 Difference]: Without dead ends: 170 [2022-01-10 21:25:42,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-01-10 21:25:42,243 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 180 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:42,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 142 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-10 21:25:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-10 21:25:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 93. [2022-01-10 21:25:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3043478260869565) internal successors, (120), 92 states have internal predecessors, (120), 0 states have call successors, (0), 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 21:25:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2022-01-10 21:25:42,290 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 48 [2022-01-10 21:25:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:42,290 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2022-01-10 21:25:42,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 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 21:25:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2022-01-10 21:25:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 21:25:42,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:42,291 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 3, 3, 3, 1, 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 21:25:42,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:42,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 21:25:42,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:42,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1496668086, now seen corresponding path program 2 times [2022-01-10 21:25:42,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420905733] [2022-01-10 21:25:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:42,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:42,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:42,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942232381] [2022-01-10 21:25:42,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:25:42,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:42,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:42,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:42,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-10 21:25:42,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:25:42,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:25:42,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:25:42,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 21:25:42,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:25:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 21:25:43,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420905733] [2022-01-10 21:25:43,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942232381] [2022-01-10 21:25:43,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942232381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:25:43,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:25:43,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 21:25:43,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302757009] [2022-01-10 21:25:43,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:25:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 21:25:43,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 21:25:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 21:25:43,095 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:47,861 INFO L93 Difference]: Finished difference Result 261 states and 342 transitions. [2022-01-10 21:25:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 21:25:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-10 21:25:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:47,862 INFO L225 Difference]: With dead ends: 261 [2022-01-10 21:25:47,862 INFO L226 Difference]: Without dead ends: 189 [2022-01-10 21:25:47,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-01-10 21:25:47,863 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 345 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:47,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 147 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-10 21:25:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-10 21:25:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 101. [2022-01-10 21:25:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.29) internal successors, (129), 100 states have internal predecessors, (129), 0 states have call successors, (0), 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 21:25:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2022-01-10 21:25:47,888 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 57 [2022-01-10 21:25:47,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:47,889 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2022-01-10 21:25:47,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:25:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2022-01-10 21:25:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 21:25:47,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:47,889 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 3, 3, 3, 1, 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 21:25:47,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-10 21:25:48,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 21:25:48,097 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash 418260592, now seen corresponding path program 3 times [2022-01-10 21:25:48,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:48,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141052774] [2022-01-10 21:25:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:48,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:48,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:48,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925257085] [2022-01-10 21:25:48,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:25:48,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:48,134 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:48,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-10 21:25:48,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 21:25:48,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:25:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 21:25:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-10 21:25:48,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:25:48,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141052774] [2022-01-10 21:25:48,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925257085] [2022-01-10 21:25:48,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925257085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:25:48,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:25:48,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:25:48,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543680942] [2022-01-10 21:25:48,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:25:48,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:25:48,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:25:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:25:48,665 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 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 21:25:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:49,455 INFO L93 Difference]: Finished difference Result 155 states and 201 transitions. [2022-01-10 21:25:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:25:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 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 59 [2022-01-10 21:25:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:49,458 INFO L225 Difference]: With dead ends: 155 [2022-01-10 21:25:49,458 INFO L226 Difference]: Without dead ends: 104 [2022-01-10 21:25:49,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:25:49,459 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:49,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 21:25:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-10 21:25:49,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-01-10 21:25:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2871287128712872) internal successors, (130), 101 states have internal predecessors, (130), 0 states have call successors, (0), 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 21:25:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2022-01-10 21:25:49,480 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 59 [2022-01-10 21:25:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:49,480 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2022-01-10 21:25:49,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 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 21:25:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2022-01-10 21:25:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 21:25:49,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:49,481 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 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 21:25:49,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-10 21:25:49,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 21:25:49,686 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1851139392, now seen corresponding path program 1 times [2022-01-10 21:25:49,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:49,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603499350] [2022-01-10 21:25:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:49,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:49,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:49,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805079333] [2022-01-10 21:25:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:49,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:49,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:49,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:49,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-10 21:25:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:25:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:25:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 31 proven. 80 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 21:25:50,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:25:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-10 21:25:50,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:50,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603499350] [2022-01-10 21:25:50,340 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:50,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805079333] [2022-01-10 21:25:50,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805079333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:25:50,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:25:50,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 21:25:50,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967202189] [2022-01-10 21:25:50,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:25:50,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 21:25:50,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 21:25:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 21:25:50,341 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 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 21:25:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:25:53,206 INFO L93 Difference]: Finished difference Result 305 states and 391 transitions. [2022-01-10 21:25:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 21:25:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 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 62 [2022-01-10 21:25:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:25:53,208 INFO L225 Difference]: With dead ends: 305 [2022-01-10 21:25:53,208 INFO L226 Difference]: Without dead ends: 234 [2022-01-10 21:25:53,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-01-10 21:25:53,208 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 355 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:25:53,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 127 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 21:25:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-10 21:25:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 85. [2022-01-10 21:25:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 84 states have internal predecessors, (107), 0 states have call successors, (0), 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 21:25:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-01-10 21:25:53,231 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 62 [2022-01-10 21:25:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:25:53,231 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-01-10 21:25:53,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 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 21:25:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-01-10 21:25:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 21:25:53,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:25:53,231 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 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 21:25:53,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-10 21:25:53,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:53,436 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:25:53,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:25:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash -72123029, now seen corresponding path program 2 times [2022-01-10 21:25:53,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:25:53,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469652660] [2022-01-10 21:25:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:25:53,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:25:53,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:25:53,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678154238] [2022-01-10 21:25:53,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:25:53,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:25:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:25:53,472 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:25:53,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-10 21:25:53,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:25:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:25:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 21:25:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:25:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 103 proven. 68 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 21:25:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:25:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 103 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 21:25:55,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:25:55,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469652660] [2022-01-10 21:25:55,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:25:55,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678154238] [2022-01-10 21:25:55,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678154238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:25:55,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:25:55,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-01-10 21:25:55,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958159691] [2022-01-10 21:25:55,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:25:55,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 21:25:55,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:25:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 21:25:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-10 21:25:55,072 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 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 21:26:14,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 21:26:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:23,355 INFO L93 Difference]: Finished difference Result 394 states and 496 transitions. [2022-01-10 21:26:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 21:26:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 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 67 [2022-01-10 21:26:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:23,357 INFO L225 Difference]: With dead ends: 394 [2022-01-10 21:26:23,357 INFO L226 Difference]: Without dead ends: 314 [2022-01-10 21:26:23,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=264, Invalid=925, Unknown=1, NotChecked=0, Total=1190 [2022-01-10 21:26:23,358 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 342 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:23,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 250 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2022-01-10 21:26:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-10 21:26:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 186. [2022-01-10 21:26:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.318918918918919) internal successors, (244), 185 states have internal predecessors, (244), 0 states have call successors, (0), 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 21:26:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 244 transitions. [2022-01-10 21:26:23,428 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 244 transitions. Word has length 67 [2022-01-10 21:26:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:23,428 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 244 transitions. [2022-01-10 21:26:23,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 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 21:26:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 244 transitions. [2022-01-10 21:26:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 21:26:23,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:23,429 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 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 21:26:23,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:23,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-10 21:26:23,633 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1412946651, now seen corresponding path program 3 times [2022-01-10 21:26:23,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:23,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402919946] [2022-01-10 21:26:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:23,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:23,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:23,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097401940] [2022-01-10 21:26:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:26:23,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:23,677 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:23,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-10 21:26:23,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 21:26:23,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:26:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 21:26:23,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-01-10 21:26:24,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:26:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-01-10 21:26:25,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402919946] [2022-01-10 21:26:25,102 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097401940] [2022-01-10 21:26:25,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097401940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:26:25,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:26:25,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2022-01-10 21:26:25,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109972118] [2022-01-10 21:26:25,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:26:25,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 21:26:25,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 21:26:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:26:25,103 INFO L87 Difference]: Start difference. First operand 186 states and 244 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 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 21:26:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:26,931 INFO L93 Difference]: Finished difference Result 318 states and 423 transitions. [2022-01-10 21:26:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 21:26:26,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 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 69 [2022-01-10 21:26:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:26,932 INFO L225 Difference]: With dead ends: 318 [2022-01-10 21:26:26,932 INFO L226 Difference]: Without dead ends: 219 [2022-01-10 21:26:26,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-01-10 21:26:26,933 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:26,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 71 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 21:26:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-10 21:26:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2022-01-10 21:26:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.3201970443349753) internal successors, (268), 203 states have internal predecessors, (268), 0 states have call successors, (0), 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 21:26:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 268 transitions. [2022-01-10 21:26:27,017 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 268 transitions. Word has length 69 [2022-01-10 21:26:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 268 transitions. [2022-01-10 21:26:27,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 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 21:26:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 268 transitions. [2022-01-10 21:26:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 21:26:27,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:27,017 INFO L514 BasicCegarLoop]: trace histogram [14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:27,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-10 21:26:27,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-10 21:26:27,222 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1294043479, now seen corresponding path program 4 times [2022-01-10 21:26:27,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595028554] [2022-01-10 21:26:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:27,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:27,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:27,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558265322] [2022-01-10 21:26:27,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 21:26:27,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:27,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:27,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-10 21:26:27,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 21:26:27,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:26:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 21:26:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 27 proven. 168 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-01-10 21:26:27,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:26:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 18 proven. 177 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-01-10 21:26:28,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:28,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595028554] [2022-01-10 21:26:28,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:28,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558265322] [2022-01-10 21:26:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558265322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:26:28,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:26:28,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-10 21:26:28,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273959360] [2022-01-10 21:26:28,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:26:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 21:26:28,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 21:26:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 21:26:28,181 INFO L87 Difference]: Start difference. First operand 204 states and 268 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)