/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_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:30:16,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:30:16,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:30:17,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:30:17,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:30:17,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:30:17,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:30:17,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:30:17,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:30:17,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:30:17,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:30:17,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:30:17,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:30:17,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:30:17,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:30:17,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:30:17,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:30:17,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:30:17,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:30:17,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:30:17,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:30:17,072 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:30:17,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:30:17,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:30:17,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:30:17,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:30:17,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:30:17,073 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:30:17,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:30:17,074 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:30:17,075 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:30:17,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:30:17,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:30:17,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:30:17,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:30:17,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:30:17,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:17,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:30:17,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:30:17,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:30:17,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:30:17,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:30:17,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:30:17,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:30:17,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:30:17,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:30:17,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:30:17,077 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:30:17,078 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:30:17,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:30:17,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:30:17,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:30:17,267 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:30:17,267 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:30:17,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2022-01-10 12:30:17,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f8c6a71/3aa041e0cd6b464986558786775597f3/FLAG356a319e9 [2022-01-10 12:30:17,696 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:30:17,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2022-01-10 12:30:17,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f8c6a71/3aa041e0cd6b464986558786775597f3/FLAG356a319e9 [2022-01-10 12:30:18,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40f8c6a71/3aa041e0cd6b464986558786775597f3 [2022-01-10 12:30:18,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:30:18,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:30:18,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:18,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:30:18,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:30:18,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38713088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:30:18,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:30:18,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c[970,983] [2022-01-10 12:30:18,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:18,309 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:30:18,340 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c[970,983] [2022-01-10 12:30:18,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:18,358 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:30:18,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18 WrapperNode [2022-01-10 12:30:18,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:18,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:18,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:30:18,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:30:18,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,422 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-01-10 12:30:18,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:18,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:30:18,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:30:18,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:30:18,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:30:18,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:30:18,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:30:18,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:30:18,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:18,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:18,468 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 12:30:18,494 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 12:30:18,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:30:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-01-10 12:30:18,509 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-01-10 12:30:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:30:18,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:30:18,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:30:18,560 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:30:18,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:30:18,647 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:30:18,652 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:30:18,652 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:30:18,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:18 BoogieIcfgContainer [2022-01-10 12:30:18,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:30:18,655 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:30:18,655 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:30:18,656 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:30:18,659 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:18" (1/1) ... [2022-01-10 12:30:18,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:18 BasicIcfg [2022-01-10 12:30:18,745 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:30:18,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:30:18,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:30:18,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:30:18,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:30:18" (1/4) ... [2022-01-10 12:30:18,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b90072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:18" (2/4) ... [2022-01-10 12:30:18,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b90072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:18" (3/4) ... [2022-01-10 12:30:18,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b90072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:30:18, skipping insertion in model container [2022-01-10 12:30:18,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:18" (4/4) ... [2022-01-10 12:30:18,751 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.cTransformedIcfg [2022-01-10 12:30:18,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:30:18,759 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:30:18,804 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:30:18,809 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 12:30:18,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:30:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 12:30:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 12:30:18,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:18,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:18,827 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash -878487567, now seen corresponding path program 1 times [2022-01-10 12:30:18,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:18,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288894262] [2022-01-10 12:30:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:18,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 12:30:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:30:19,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288894262] [2022-01-10 12:30:19,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288894262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:19,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:19,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 12:30:19,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969701047] [2022-01-10 12:30:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:19,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 12:30:19,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 12:30:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:30:19,224 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 12:30:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:19,341 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-01-10 12:30:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 12:30:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-10 12:30:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:19,361 INFO L225 Difference]: With dead ends: 36 [2022-01-10 12:30:19,361 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 12:30:19,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 12:30:19,367 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:19,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 12:30:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 12:30:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-10 12:30:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-10 12:30:19,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 20 [2022-01-10 12:30:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:19,414 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-10 12:30:19,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 12:30:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-10 12:30:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 12:30:19,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:19,416 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] [2022-01-10 12:30:19,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:30:19,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash 573011356, now seen corresponding path program 1 times [2022-01-10 12:30:19,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:19,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984586097] [2022-01-10 12:30:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:19,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 12:30:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 12:30:19,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984586097] [2022-01-10 12:30:19,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984586097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485258362] [2022-01-10 12:30:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:19,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:19,601 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 12:30:19,602 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 12:30:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 12:30:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 12:30:19,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 12:30:20,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485258362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:20,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:20,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-10 12:30:20,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620180840] [2022-01-10 12:30:20,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:20,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 12:30:20,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:20,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 12:30:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 12:30:20,129 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 12:30:20,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:20,290 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-01-10 12:30:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:30:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-01-10 12:30:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:20,292 INFO L225 Difference]: With dead ends: 35 [2022-01-10 12:30:20,292 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 12:30:20,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:30:20,294 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:20,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 12:30:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 12:30:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 12:30:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 12:30:20,304 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2022-01-10 12:30:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:20,305 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 12:30:20,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 12:30:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 12:30:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 12:30:20,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:20,308 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:20,330 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 12:30:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:20,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1452006525, now seen corresponding path program 1 times [2022-01-10 12:30:20,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:20,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662100545] [2022-01-10 12:30:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:20,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 12:30:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 12:30:20,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:20,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662100545] [2022-01-10 12:30:20,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662100545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706545426] [2022-01-10 12:30:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:20,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:20,817 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 12:30:20,819 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 12:30:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 12:30:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 12:30:21,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 12:30:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706545426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:21,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:21,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-10 12:30:21,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142509181] [2022-01-10 12:30:21,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 12:30:21,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 12:30:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 12:30:21,338 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 12:30:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:21,406 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-10 12:30:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:30:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-01-10 12:30:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:21,408 INFO L225 Difference]: With dead ends: 31 [2022-01-10 12:30:21,408 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 12:30:21,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 12:30:21,410 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:21,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 55 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 12:30:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-10 12:30:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 12:30:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-01-10 12:30:21,417 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 46 [2022-01-10 12:30:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:21,418 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-01-10 12:30:21,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 12:30:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-01-10 12:30:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 12:30:21,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:21,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:21,450 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 12:30:21,639 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,SelfDestructingSolverStorable2 [2022-01-10 12:30:21,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash -579014909, now seen corresponding path program 2 times [2022-01-10 12:30:21,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:21,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366452585] [2022-01-10 12:30:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:21,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:21,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:30:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 12:30:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:30:22,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366452585] [2022-01-10 12:30:22,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366452585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:22,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181567069] [2022-01-10 12:30:22,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:30:22,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:22,334 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 12:30:22,335 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 12:30:22,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:30:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-10 12:30:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 12:30:24,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 12:31:00,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181567069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:00,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:00,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 14] total 43 [2022-01-10 12:31:00,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448822689] [2022-01-10 12:31:00,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:00,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-10 12:31:00,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-10 12:31:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 12:31:01,000 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 12:31:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:02,430 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2022-01-10 12:31:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 12:31:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 34 [2022-01-10 12:31:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:02,432 INFO L225 Difference]: With dead ends: 63 [2022-01-10 12:31:02,432 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 12:31:02,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=352, Invalid=2618, Unknown=0, NotChecked=0, Total=2970 [2022-01-10 12:31:02,435 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:02,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 173 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 332 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-01-10 12:31:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 12:31:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-10 12:31:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-10 12:31:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2022-01-10 12:31:02,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 34 [2022-01-10 12:31:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:02,447 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2022-01-10 12:31:02,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-10 12:31:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2022-01-10 12:31:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 12:31:02,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:02,449 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:02,480 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 12:31:02,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:02,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash 863393056, now seen corresponding path program 2 times [2022-01-10 12:31:02,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:02,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709150420] [2022-01-10 12:31:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:02,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 12:31:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-10 12:31:02,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709150420] [2022-01-10 12:31:02,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709150420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:02,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183128826] [2022-01-10 12:31:02,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:31:02,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:02,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:02,886 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 12:31:02,887 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 12:31:03,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:31:03,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 12:31:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 12:31:03,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:04,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183128826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:04,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 12:31:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 21 [2022-01-10 12:31:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190527203] [2022-01-10 12:31:04,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:04,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 12:31:04,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 12:31:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-10 12:31:04,155 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 12:31:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:04,376 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2022-01-10 12:31:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 12:31:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 47 [2022-01-10 12:31:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:04,378 INFO L225 Difference]: With dead ends: 50 [2022-01-10 12:31:04,378 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 12:31:04,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-01-10 12:31:04,379 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:04,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 145 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 131 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-10 12:31:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 12:31:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-10 12:31:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (25), 10 states have call predecessors, (25), 5 states have call successors, (25) [2022-01-10 12:31:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2022-01-10 12:31:04,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 47 [2022-01-10 12:31:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:04,390 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2022-01-10 12:31:04,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-10 12:31:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2022-01-10 12:31:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 12:31:04,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:04,392 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:04,409 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 12:31:04,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:04,595 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 43817754, now seen corresponding path program 3 times [2022-01-10 12:31:04,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:04,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655624735] [2022-01-10 12:31:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:04,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:31:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:04,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:04,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-10 12:31:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:05,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:05,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 12:31:05,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655624735] [2022-01-10 12:31:05,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655624735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:05,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448948162] [2022-01-10 12:31:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:31:05,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:05,592 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 12:31:05,627 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 12:31:05,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 12:31:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-10 12:31:05,785 INFO L286 TraceCheckSpWp]: Computing forward predicates...