/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/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:30:25,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:30:25,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:30:25,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:30:25,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:30:25,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:30:25,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:30:25,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:30:25,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:30:25,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:30:25,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:30:25,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:30:25,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:30:25,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:30:25,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:30:25,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:30:25,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:30:25,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 12:30:25,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 12:30:25,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 12:30:25,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 12:30:25,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 12:30:25,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 12:30:25,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 12:30:25,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 12:30:25,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:30:25,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:30:25,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:30:25,709 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 12:30:25,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:30:25,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:30:25,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:30:25,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:30:25,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:30:25,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:30:25,735 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:30:25,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:30:25,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:30:25,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:30:25,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:30:25,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:30:25,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:30:25,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:30:25,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:30:25,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:25,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:30:25,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:30:25,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:30:25,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:30:25,739 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:30:25,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:30:25,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:30:25,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:30:25,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:30:25,933 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:30:25,935 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:30:25,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2022-01-10 12:30:25,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04aad41a6/9b668c9deca943f2a984fc5b009da0b2/FLAG254f7dbab [2022-01-10 12:30:26,309 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:30:26,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2022-01-10 12:30:26,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04aad41a6/9b668c9deca943f2a984fc5b009da0b2/FLAG254f7dbab [2022-01-10 12:30:26,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04aad41a6/9b668c9deca943f2a984fc5b009da0b2 [2022-01-10 12:30:26,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:30:26,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:30:26,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:26,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:30:26,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:30:26,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30aa6b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26, skipping insertion in model container [2022-01-10 12:30:26,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:30:26,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:30:26,449 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/recHanoi02-2.c[839,852] [2022-01-10 12:30:26,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:26,460 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:30:26,473 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/recHanoi02-2.c[839,852] [2022-01-10 12:30:26,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:26,481 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:30:26,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26 WrapperNode [2022-01-10 12:30:26,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:26,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:26,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:30:26,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:30:26,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,512 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-01-10 12:30:26,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:26,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:30:26,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:30:26,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:30:26,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:30:26,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:30:26,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:30:26,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:30:26,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:26,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:26,566 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 12:30:26,570 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 12:30:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:30:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-01-10 12:30:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-01-10 12:30:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:30:26,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:30:26,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:30:26,630 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:30:26,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:30:26,695 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:30:26,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:30:26,699 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:30:26,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:26 BoogieIcfgContainer [2022-01-10 12:30:26,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:30:26,701 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:30:26,701 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:30:26,702 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:30:26,703 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:26" (1/1) ... [2022-01-10 12:30:26,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:26 BasicIcfg [2022-01-10 12:30:26,739 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:30:26,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:30:26,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:30:26,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:30:26,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:30:26" (1/4) ... [2022-01-10 12:30:26,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ba805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:26, skipping insertion in model container [2022-01-10 12:30:26,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:26" (2/4) ... [2022-01-10 12:30:26,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ba805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:26, skipping insertion in model container [2022-01-10 12:30:26,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:26" (3/4) ... [2022-01-10 12:30:26,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400ba805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:30:26, skipping insertion in model container [2022-01-10 12:30:26,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:26" (4/4) ... [2022-01-10 12:30:26,745 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.cTransformedIcfg [2022-01-10 12:30:26,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:30:26,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:30:26,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:30:26,789 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 12:30:26,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:30:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:30:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 12:30:26,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:26,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:26,822 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1230283936, now seen corresponding path program 1 times [2022-01-10 12:30:26,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:26,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612377529] [2022-01-10 12:30:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:26,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:27,078 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 12:30:27,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612377529] [2022-01-10 12:30:27,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612377529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:27,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:27,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:30:27,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504086056] [2022-01-10 12:30:27,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:27,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:30:27,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:30:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:30:27,110 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:30:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:27,148 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-10 12:30:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:30:27,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 12:30:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:27,157 INFO L225 Difference]: With dead ends: 29 [2022-01-10 12:30:27,157 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 12:30:27,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:30:27,161 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:27,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:30:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 12:30:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 12:30:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:30:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-01-10 12:30:27,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-01-10 12:30:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:27,196 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-01-10 12:30:27,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:30:27,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-01-10 12:30:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 12:30:27,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:27,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:27,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:30:27,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:27,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1313180132, now seen corresponding path program 1 times [2022-01-10 12:30:27,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:27,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178071696] [2022-01-10 12:30:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:27,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:27,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:30:27,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:27,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178071696] [2022-01-10 12:30:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178071696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:27,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587434012] [2022-01-10 12:30:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:27,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:27,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:27,350 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 12:30:27,351 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 12:30:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:30:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:30:27,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 12:30:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587434012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:28,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:28,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-10 12:30:28,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126083005] [2022-01-10 12:30:28,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:28,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 12:30:28,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 12:30:28,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:30:28,015 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 12:30:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:28,056 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-01-10 12:30:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 12:30:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 17 [2022-01-10 12:30:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:28,058 INFO L225 Difference]: With dead ends: 28 [2022-01-10 12:30:28,058 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 12:30:28,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:30:28,059 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:28,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2022-01-10 12:30:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 12:30:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 12:30:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 12:30:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-10 12:30:28,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-01-10 12:30:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:28,063 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-10 12:30:28,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 12:30:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-10 12:30:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 12:30:28,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:28,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:28,097 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 12:30:28,264 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 12:30:28,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 790276260, now seen corresponding path program 2 times [2022-01-10 12:30:28,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817188649] [2022-01-10 12:30:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:28,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:28,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:28,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:28,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:28,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:30:28,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:28,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817188649] [2022-01-10 12:30:28,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817188649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:28,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216369064] [2022-01-10 12:30:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:30:28,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:28,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:28,627 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 12:30:28,629 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 12:30:28,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:30:28,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:28,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 12:30:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:30:29,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:30:31,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216369064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:31,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:31,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-10 12:30:31,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898371193] [2022-01-10 12:30:31,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:31,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 12:30:31,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 12:30:31,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-10 12:30:31,054 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 12:30:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:53,000 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-10 12:30:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 12:30:53,001 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 29 [2022-01-10 12:30:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:53,001 INFO L225 Difference]: With dead ends: 40 [2022-01-10 12:30:53,001 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 12:30:53,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=134, Invalid=795, Unknown=1, NotChecked=0, Total=930 [2022-01-10 12:30:53,003 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:53,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 219 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-01-10 12:30:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 12:30:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-10 12:30:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 12:30:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-10 12:30:53,007 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-01-10 12:30:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:53,008 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-10 12:30:53,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 16 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2022-01-10 12:30:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-10 12:30:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 12:30:53,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:53,009 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:53,033 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 12:30:53,209 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 12:30:53,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:53,210 INFO L85 PathProgramCache]: Analyzing trace with hash 722871844, now seen corresponding path program 3 times [2022-01-10 12:30:53,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:53,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949627385] [2022-01-10 12:30:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:53,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 12:30:53,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949627385] [2022-01-10 12:30:53,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949627385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978782075] [2022-01-10 12:30:53,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:30:53,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:53,832 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 12:30:53,833 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 12:30:53,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 12:30:53,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:53,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-10 12:30:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 70 refuted. 7 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 12:31:33,055 INFO L328 TraceCheckSpWp]: Computing backward predicates...