/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:14:02,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:14:02,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:14:02,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:14:02,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:14:02,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:14:02,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:14:02,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:14:02,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:14:02,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:14:02,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:14:02,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:14:02,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:14:02,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:14:02,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:14:02,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:14:02,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:14:02,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:14:02,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:14:02,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:14:02,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:14:02,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:14:03,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:14:03,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:14:03,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 00:14:03,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:14:03,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:14:03,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:14:03,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:14:03,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:14:03,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:14:03,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:14:03,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:14:03,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:14:03,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:14:03,063 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:14:03,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:14:03,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:14:03,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:14:03,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:14:03,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:14:03,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:14:03,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:14:03,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:14:03,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:14:03,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:14:03,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:14:03,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:14:03,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:14:03,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:14:03,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:14:03,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:14:03,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:14:03,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:14:03,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:14:03,070 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:14:03,070 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:14:03,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:14:03,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:14:03,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:14:03,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:14:03,290 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:14:03,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2022-01-11 00:14:03,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959d21190/e004fb45c683431c9c16f1c6d1b5d7f2/FLAGce5724fa7 [2022-01-11 00:14:03,748 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:14:03,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2022-01-11 00:14:03,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959d21190/e004fb45c683431c9c16f1c6d1b5d7f2/FLAGce5724fa7 [2022-01-11 00:14:03,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959d21190/e004fb45c683431c9c16f1c6d1b5d7f2 [2022-01-11 00:14:03,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:14:03,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:14:03,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:14:03,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:14:03,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:14:03,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:14:03" (1/1) ... [2022-01-11 00:14:03,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bbdad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:03, skipping insertion in model container [2022-01-11 00:14:03,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:14:03" (1/1) ... [2022-01-11 00:14:03,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:14:03,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:14:03,944 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-simple/id_i5_o5-2.c[450,463] [2022-01-11 00:14:03,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:14:03,985 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:14:03,996 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-simple/id_i5_o5-2.c[450,463] [2022-01-11 00:14:03,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:14:04,007 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:14:04,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04 WrapperNode [2022-01-11 00:14:04,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:14:04,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:14:04,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:14:04,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:14:04,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,038 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-11 00:14:04,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:14:04,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:14:04,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:14:04,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:14:04,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:14:04,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:14:04,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:14:04,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:14:04,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:14:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:04,114 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) [2022-01-11 00:14:04,123 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 [2022-01-11 00:14:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:14:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:14:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:14:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:14:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-11 00:14:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-11 00:14:04,198 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:14:04,200 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:14:04,313 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:14:04,318 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:14:04,318 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:14:04,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:14:04 BoogieIcfgContainer [2022-01-11 00:14:04,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:14:04,321 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:14:04,321 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:14:04,324 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:14:04,326 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:14:04" (1/1) ... [2022-01-11 00:14:04,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:14:04 BasicIcfg [2022-01-11 00:14:04,408 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:14:04,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:14:04,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:14:04,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:14:04,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:14:03" (1/4) ... [2022-01-11 00:14:04,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a4c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:14:04, skipping insertion in model container [2022-01-11 00:14:04,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:14:04" (2/4) ... [2022-01-11 00:14:04,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a4c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:14:04, skipping insertion in model container [2022-01-11 00:14:04,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:14:04" (3/4) ... [2022-01-11 00:14:04,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0a4c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:14:04, skipping insertion in model container [2022-01-11 00:14:04,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:14:04" (4/4) ... [2022-01-11 00:14:04,415 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.cTransformedIcfg [2022-01-11 00:14:04,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:14:04,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:14:04,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:14:04,522 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 [2022-01-11 00:14:04,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:14:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-01-11 00:14:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:14:04,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:04,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:04,545 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times [2022-01-11 00:14:04,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:04,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475763991] [2022-01-11 00:14:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:04,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:04,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:14:04,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475763991] [2022-01-11 00:14:04,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475763991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:14:04,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:14:04,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:14:04,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127692828] [2022-01-11 00:14:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:14:04,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:14:04,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:14:04,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:14:04,862 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-01-11 00:14:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:04,905 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-11 00:14:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:14:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2022-01-11 00:14:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:04,914 INFO L225 Difference]: With dead ends: 25 [2022-01-11 00:14:04,914 INFO L226 Difference]: Without dead ends: 15 [2022-01-11 00:14:04,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:14:04,920 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:04,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:14:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-11 00:14:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-11 00:14:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 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) [2022-01-11 00:14:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-11 00:14:04,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-11 00:14:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:04,954 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-11 00:14:04,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-01-11 00:14:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-11 00:14:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 00:14:04,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:04,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:04,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:14:04,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times [2022-01-11 00:14:04,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:04,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9198402] [2022-01-11 00:14:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:04,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:05,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:05,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:14:05,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9198402] [2022-01-11 00:14:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9198402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924413583] [2022-01-11 00:14:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:05,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:05,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:05,164 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) [2022-01-11 00:14:05,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:14:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:14:05,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:14:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:14:05,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:14:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:14:05,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924413583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:14:05,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:14:05,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-11 00:14:05,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109545751] [2022-01-11 00:14:05,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:14:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 00:14:05,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 00:14:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:14:05,706 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-11 00:14:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:05,787 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-11 00:14:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 00:14:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2022-01-11 00:14:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:05,789 INFO L225 Difference]: With dead ends: 22 [2022-01-11 00:14:05,789 INFO L226 Difference]: Without dead ends: 18 [2022-01-11 00:14:05,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-11 00:14:05,791 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:05,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:14:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-11 00:14:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-11 00:14:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-11 00:14:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-11 00:14:05,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-11 00:14:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:05,796 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-11 00:14:05,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-11 00:14:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-11 00:14:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:14:05,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:05,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:05,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 00:14:06,019 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 [2022-01-11 00:14:06,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times [2022-01-11 00:14:06,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097370789] [2022-01-11 00:14:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:06,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:06,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:06,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:06,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:14:06,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097370789] [2022-01-11 00:14:06,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097370789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313270778] [2022-01-11 00:14:06,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:14:06,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:06,315 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) [2022-01-11 00:14:06,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:14:06,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:14:06,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:14:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:14:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:14:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 00:14:06,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:14:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:14:07,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313270778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:14:07,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:14:07,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-01-11 00:14:07,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561933084] [2022-01-11 00:14:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:14:07,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 00:14:07,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:07,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 00:14:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-11 00:14:07,012 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-11 00:14:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:07,146 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-11 00:14:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:14:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-11 00:14:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:07,148 INFO L225 Difference]: With dead ends: 25 [2022-01-11 00:14:07,148 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 00:14:07,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-11 00:14:07,149 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:07,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:14:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 00:14:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 00:14:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 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) [2022-01-11 00:14:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-11 00:14:07,153 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-11 00:14:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:07,153 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-11 00:14:07,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-11 00:14:07,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-11 00:14:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 00:14:07,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:07,154 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:07,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 00:14:07,371 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 [2022-01-11 00:14:07,372 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times [2022-01-11 00:14:07,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:07,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945816422] [2022-01-11 00:14:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:07,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:07,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:07,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 00:14:07,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:07,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945816422] [2022-01-11 00:14:07,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945816422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:07,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899961101] [2022-01-11 00:14:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:14:07,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:07,570 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) [2022-01-11 00:14:07,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 00:14:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 00:14:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:14:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:14:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:14:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 00:14:07,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:14:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:14:08,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899961101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:14:08,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:14:08,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-01-11 00:14:08,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241624245] [2022-01-11 00:14:08,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:14:08,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 00:14:08,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 00:14:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-11 00:14:08,366 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-11 00:14:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:08,496 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-11 00:14:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 00:14:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 28 [2022-01-11 00:14:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:08,498 INFO L225 Difference]: With dead ends: 28 [2022-01-11 00:14:08,498 INFO L226 Difference]: Without dead ends: 24 [2022-01-11 00:14:08,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-11 00:14:08,499 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:08,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 88 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:14:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-11 00:14:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-11 00:14:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-11 00:14:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-11 00:14:08,503 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-11 00:14:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:08,503 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-11 00:14:08,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-11 00:14:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-11 00:14:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 00:14:08,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:08,504 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:08,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 00:14:08,711 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 [2022-01-11 00:14:08,712 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash -41530752, now seen corresponding path program 4 times [2022-01-11 00:14:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501100366] [2022-01-11 00:14:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:08,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:08,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:08,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:08,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:08,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 00:14:08,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:08,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501100366] [2022-01-11 00:14:08,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501100366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707764815] [2022-01-11 00:14:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:14:08,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:08,939 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) [2022-01-11 00:14:08,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 00:14:09,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:14:09,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:14:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 00:14:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:14:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 00:14:09,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:14:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 00:14:10,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707764815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:14:10,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:14:10,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 22 [2022-01-11 00:14:10,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430927128] [2022-01-11 00:14:10,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:14:10,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-11 00:14:10,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-11 00:14:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-11 00:14:10,249 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-11 00:14:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:10,496 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-11 00:14:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:14:10,496 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 34 [2022-01-11 00:14:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:10,497 INFO L225 Difference]: With dead ends: 31 [2022-01-11 00:14:10,497 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 00:14:10,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:14:10,499 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:10,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:14:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 00:14:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-11 00:14:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-11 00:14:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-11 00:14:10,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-11 00:14:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:10,504 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-11 00:14:10,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-11 00:14:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-11 00:14:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-11 00:14:10,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:10,505 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:10,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 00:14:10,748 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 [2022-01-11 00:14:10,748 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash -10048123, now seen corresponding path program 5 times [2022-01-11 00:14:10,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129146231] [2022-01-11 00:14:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:10,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:10,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:10,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:11,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:11,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:11,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 00:14:11,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129146231] [2022-01-11 00:14:11,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129146231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146894558] [2022-01-11 00:14:11,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 00:14:11,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:11,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:11,141 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) [2022-01-11 00:14:11,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 00:14:11,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-11 00:14:11,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:14:11,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-11 00:14:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:14:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 00:14:37,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:14:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-11 00:14:38,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146894558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:14:38,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:14:38,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-01-11 00:14:38,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673372814] [2022-01-11 00:14:38,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:14:38,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-11 00:14:38,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-11 00:14:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=900, Unknown=12, NotChecked=0, Total=992 [2022-01-11 00:14:38,624 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 19 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 13 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-11 00:14:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:38,736 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-11 00:14:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 00:14:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 19 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 13 states have call predecessors, (16), 1 states have call successors, (16) Word has length 40 [2022-01-11 00:14:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:38,738 INFO L225 Difference]: With dead ends: 34 [2022-01-11 00:14:38,738 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 00:14:38,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=80, Invalid=900, Unknown=12, NotChecked=0, Total=992 [2022-01-11 00:14:38,739 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:38,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 421 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-01-11 00:14:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 00:14:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-11 00:14:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-11 00:14:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-11 00:14:38,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-11 00:14:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:38,743 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-11 00:14:38,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 19 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 13 states have call predecessors, (16), 1 states have call successors, (16) [2022-01-11 00:14:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-11 00:14:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 00:14:38,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:14:38,744 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:14:38,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 00:14:38,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:38,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:14:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:14:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1028064608, now seen corresponding path program 6 times [2022-01-11 00:14:38,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:14:38,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162293215] [2022-01-11 00:14:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:14:38,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:14:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:14:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:14:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 61 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-11 00:14:39,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:14:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162293215] [2022-01-11 00:14:39,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162293215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386100430] [2022-01-11 00:14:39,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 00:14:39,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:14:39,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:14:39,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 00:14:39,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-11 00:14:39,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:14:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-11 00:14:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:14:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-11 00:14:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:14:43,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386100430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:14:43,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 00:14:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-01-11 00:14:43,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625307321] [2022-01-11 00:14:43,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 00:14:43,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 00:14:43,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:14:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 00:14:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-01-11 00:14:43,159 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 16 states have (on average 2.375) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (14), 12 states have call predecessors, (14), 6 states have call successors, (14) [2022-01-11 00:14:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:14:44,035 INFO L93 Difference]: Finished difference Result 58 states and 87 transitions. [2022-01-11 00:14:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-11 00:14:44,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (14), 12 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2022-01-11 00:14:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:14:44,036 INFO L225 Difference]: With dead ends: 58 [2022-01-11 00:14:44,037 INFO L226 Difference]: Without dead ends: 0 [2022-01-11 00:14:44,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-01-11 00:14:44,038 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:14:44,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 00:14:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-11 00:14:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-11 00:14:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:14:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-11 00:14:44,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2022-01-11 00:14:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:14:44,039 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-11 00:14:44,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 12 states have return successors, (14), 12 states have call predecessors, (14), 6 states have call successors, (14) [2022-01-11 00:14:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-11 00:14:44,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-11 00:14:44,041 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-11 00:14:44,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-11 00:14:44,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:14:44,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L854 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 5 |ULTIMATE.start_ULTIMATE.start_main_~input~0#1Int|) (<= |ULTIMATE.start_ULTIMATE.start_main_~input~0#1Int| 5)) [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-11 00:14:44,296 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-11 00:14:44,297 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2022-01-11 00:14:44,297 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-01-11 00:14:44,297 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2022-01-11 00:14:44,297 INFO L854 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (and (< 0 id_id_~xInt) (<= |id_id_#in~xInt| 4294967295) (= |id_id_#in~xInt| id_id_~xInt)) [2022-01-11 00:14:44,297 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2022-01-11 00:14:44,297 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2022-01-11 00:14:44,299 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1] [2022-01-11 00:14:44,300 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-11 00:14:44,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:14:44 BasicIcfg [2022-01-11 00:14:44,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-11 00:14:44,302 INFO L158 Benchmark]: Toolchain (without parser) took 40524.31ms. Allocated memory was 184.5MB in the beginning and 289.4MB in the end (delta: 104.9MB). Free memory was 134.4MB in the beginning and 129.9MB in the end (delta: 4.5MB). Peak memory consumption was 109.8MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,302 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-11 00:14:44,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.34ms. Allocated memory is still 184.5MB. Free memory was 134.3MB in the beginning and 161.9MB in the end (delta: -27.6MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,303 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.60ms. Allocated memory is still 184.5MB. Free memory was 161.9MB in the beginning and 160.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,303 INFO L158 Benchmark]: Boogie Preprocessor took 21.41ms. Allocated memory is still 184.5MB. Free memory was 160.3MB in the beginning and 159.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,303 INFO L158 Benchmark]: RCFGBuilder took 257.96ms. Allocated memory is still 184.5MB. Free memory was 159.3MB in the beginning and 150.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,303 INFO L158 Benchmark]: IcfgTransformer took 87.39ms. Allocated memory is still 184.5MB. Free memory was 150.9MB in the beginning and 147.7MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,303 INFO L158 Benchmark]: TraceAbstraction took 39892.33ms. Allocated memory was 184.5MB in the beginning and 289.4MB in the end (delta: 104.9MB). Free memory was 147.2MB in the beginning and 129.9MB in the end (delta: 17.3MB). Peak memory consumption was 123.2MB. Max. memory is 8.0GB. [2022-01-11 00:14:44,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.34ms. Allocated memory is still 184.5MB. Free memory was 134.3MB in the beginning and 161.9MB in the end (delta: -27.6MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.60ms. Allocated memory is still 184.5MB. Free memory was 161.9MB in the beginning and 160.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.41ms. Allocated memory is still 184.5MB. Free memory was 160.3MB in the beginning and 159.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 257.96ms. Allocated memory is still 184.5MB. Free memory was 159.3MB in the beginning and 150.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * IcfgTransformer took 87.39ms. Allocated memory is still 184.5MB. Free memory was 150.9MB in the beginning and 147.7MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * TraceAbstraction took 39892.33ms. Allocated memory was 184.5MB in the beginning and 289.4MB in the end (delta: 104.9MB). Free memory was 147.2MB in the beginning and 129.9MB in the end (delta: 17.3MB). Peak memory consumption was 123.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.8s, OverallIterations: 7, TraceHistogramMax: 7, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 269 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 939 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 831 mSDsCounter, 172 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 547 IncrementalHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 172 mSolverCounterUnsat, 108 mSDtfsCounter, 547 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 486 GetRequests, 297 SyntacticMatches, 32 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 28.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 18 HoareAnnotationTreeSize, 13 FomulaSimplifications, 44 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 204 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 35.7s InterpolantComputationTime, 382 NumberOfCodeBlocks, 382 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 504 ConstructedInterpolants, 8 QuantifiedInterpolants, 4653 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 18 InterpolantComputations, 1 PerfectInterpolantSequences, 345/768 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-11 00:14:44,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...