/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 11:47:58,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 11:47:58,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 11:47:58,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 11:47:58,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 11:47:58,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 11:47:58,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 11:47:58,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 11:47:58,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 11:47:58,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 11:47:58,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 11:47:58,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 11:47:58,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 11:47:58,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 11:47:58,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 11:47:58,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 11:47:58,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 11:47:58,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 11:47:58,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 11:47:58,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 11:47:58,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 11:47:58,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 11:47:58,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 11:47:58,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 11:47:58,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 11:47:58,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 11:47:58,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 11:47:58,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 11:47:58,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 11:47:58,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 11:47:58,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 11:47:58,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 11:47:58,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 11:47:58,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 11:47:58,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 11:47:58,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 11:47:58,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 11:47:58,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 11:47:58,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 11:47:58,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 11:47:58,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 11:47:58,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 11:47:58,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 11:47:58,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 11:47:58,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 11:47:58,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 11:47:58,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 11:47:58,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 11:47:58,133 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 11:47:58,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 11:47:58,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 11:47:58,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 11:47:58,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 11:47:58,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 11:47:58,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 11:47:58,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 11:47:58,134 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 11:47:58,134 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 11:47:58,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 11:47:58,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 11:47:58,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 11:47:58,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 11:47:58,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 11:47:58,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 11:47:58,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 11:47:58,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 11:47:58,137 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 11:47:58,138 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 11:47:58,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 11:47:58,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 11:47:58,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 11:47:58,354 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 11:47:58,355 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 11:47:58,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2022-01-10 11:47:58,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333e378bf/f24b2cecd9e04e0bb45616db26e5beba/FLAGdd768bd4d [2022-01-10 11:47:58,767 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 11:47:58,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c [2022-01-10 11:47:58,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333e378bf/f24b2cecd9e04e0bb45616db26e5beba/FLAGdd768bd4d [2022-01-10 11:47:58,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333e378bf/f24b2cecd9e04e0bb45616db26e5beba [2022-01-10 11:47:58,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 11:47:58,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 11:47:58,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 11:47:58,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 11:47:58,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 11:47:58,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:47:58" (1/1) ... [2022-01-10 11:47:58,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dad236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:58, skipping insertion in model container [2022-01-10 11:47:58,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:47:58" (1/1) ... [2022-01-10 11:47:58,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 11:47:58,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 11:47:58,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2022-01-10 11:47:58,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 11:47:58,987 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 11:47:59,004 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/Muller_Kahan.c.p+cfa-reducer.c[964,977] [2022-01-10 11:47:59,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 11:47:59,015 INFO L208 MainTranslator]: Completed translation [2022-01-10 11:47:59,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59 WrapperNode [2022-01-10 11:47:59,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 11:47:59,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 11:47:59,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 11:47:59,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 11:47:59,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,040 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-01-10 11:47:59,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 11:47:59,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 11:47:59,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 11:47:59,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 11:47:59,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 11:47:59,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 11:47:59,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 11:47:59,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 11:47:59,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 11:47:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:47:59,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 11:47:59,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 11:47:59,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 11:47:59,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 11:47:59,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 11:47:59,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 11:47:59,180 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 11:47:59,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 11:47:59,288 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 11:47:59,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 11:47:59,292 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 11:47:59,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:47:59 BoogieIcfgContainer [2022-01-10 11:47:59,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 11:47:59,294 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 11:47:59,294 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 11:47:59,302 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 11:47:59,304 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:47:59" (1/1) ... [2022-01-10 11:47:59,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:47:59 BasicIcfg [2022-01-10 11:47:59,362 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 11:47:59,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 11:47:59,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 11:47:59,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 11:47:59,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:47:58" (1/4) ... [2022-01-10 11:47:59,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f74c297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:47:59, skipping insertion in model container [2022-01-10 11:47:59,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:47:59" (2/4) ... [2022-01-10 11:47:59,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f74c297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:47:59, skipping insertion in model container [2022-01-10 11:47:59,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:47:59" (3/4) ... [2022-01-10 11:47:59,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f74c297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:47:59, skipping insertion in model container [2022-01-10 11:47:59,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:47:59" (4/4) ... [2022-01-10 11:47:59,367 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c.p+cfa-reducer.cTransformedIcfg [2022-01-10 11:47:59,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 11:47:59,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 11:47:59,403 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 11:47:59,417 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 11:47:59,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 11:47:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 11:47:59,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:47:59,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:47:59,430 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:47:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:47:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1047089128, now seen corresponding path program 1 times [2022-01-10 11:47:59,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:47:59,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836767245] [2022-01-10 11:47:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:47:59,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:47:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:47:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:47:59,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:47:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836767245] [2022-01-10 11:47:59,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836767245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:47:59,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:47:59,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 11:47:59,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102615888] [2022-01-10 11:47:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:47:59,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 11:47:59,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:47:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 11:47:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 11:47:59,649 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:47:59,693 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-01-10 11:47:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 11:47:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 11:47:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:47:59,704 INFO L225 Difference]: With dead ends: 23 [2022-01-10 11:47:59,704 INFO L226 Difference]: Without dead ends: 10 [2022-01-10 11:47:59,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 11:47:59,709 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 11:47:59,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:47:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-10 11:47:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-10 11:47:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-10 11:47:59,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-01-10 11:47:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:47:59,738 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-10 11:47:59,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-10 11:47:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 11:47:59,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:47:59,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:47:59,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 11:47:59,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:47:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:47:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1048072231, now seen corresponding path program 1 times [2022-01-10 11:47:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:47:59,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185212022] [2022-01-10 11:47:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:47:59,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:47:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:47:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:47:59,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:47:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185212022] [2022-01-10 11:47:59,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185212022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:47:59,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:47:59,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 11:47:59,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015677807] [2022-01-10 11:47:59,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:47:59,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 11:47:59,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:47:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 11:47:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 11:47:59,831 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:47:59,838 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-01-10 11:47:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 11:47:59,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 11:47:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:47:59,839 INFO L225 Difference]: With dead ends: 18 [2022-01-10 11:47:59,839 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 11:47:59,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 11:47:59,844 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 11:47:59,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:47:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 11:47:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 11:47:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-10 11:47:59,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-01-10 11:47:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:47:59,851 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-10 11:47:59,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:47:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-10 11:47:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 11:47:59,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:47:59,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:47:59,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 11:47:59,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:47:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:47:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1477904774, now seen corresponding path program 1 times [2022-01-10 11:47:59,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:47:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687372555] [2022-01-10 11:47:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:47:59,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:47:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:47:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:47:59,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:47:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687372555] [2022-01-10 11:47:59,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687372555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:47:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247844997] [2022-01-10 11:47:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:47:59,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:47:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:47:59,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 11:47:59,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 11:48:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:48:00,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 11:48:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:48:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:48:00,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 11:48:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:48:00,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247844997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 11:48:00,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 11:48:00,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 11:48:00,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198635400] [2022-01-10 11:48:00,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 11:48:00,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 11:48:00,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:48:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 11:48:00,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 11:48:00,280 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:48:00,352 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-01-10 11:48:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 11:48:00,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-10 11:48:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:48:00,353 INFO L225 Difference]: With dead ends: 21 [2022-01-10 11:48:00,353 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 11:48:00,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 11:48:00,354 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 11:48:00,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:48:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 11:48:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-10 11:48:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-10 11:48:00,357 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2022-01-10 11:48:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:48:00,357 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-10 11:48:00,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-10 11:48:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 11:48:00,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:48:00,358 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:48:00,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 11:48:00,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:48:00,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:48:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:48:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash 218836967, now seen corresponding path program 2 times [2022-01-10 11:48:00,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:48:00,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457653520] [2022-01-10 11:48:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:48:00,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:48:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:48:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:48:00,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:48:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457653520] [2022-01-10 11:48:00,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457653520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:48:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315868074] [2022-01-10 11:48:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 11:48:00,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:48:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:48:00,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 11:48:00,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 11:48:00,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 11:48:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 11:48:00,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 11:48:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:48:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:48:07,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 11:48:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:48:08,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315868074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 11:48:08,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 11:48:08,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-10 11:48:08,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431761743] [2022-01-10 11:48:08,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 11:48:08,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 11:48:08,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:48:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 11:48:08,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=159, Unknown=3, NotChecked=0, Total=240 [2022-01-10 11:48:08,737 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:48:13,759 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-01-10 11:48:13,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 11:48:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 11:48:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:48:13,763 INFO L225 Difference]: With dead ends: 26 [2022-01-10 11:48:13,763 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 11:48:13,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=120, Invalid=218, Unknown=4, NotChecked=0, Total=342 [2022-01-10 11:48:13,764 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 11:48:13,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-10 11:48:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 11:48:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-10 11:48:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-01-10 11:48:13,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2022-01-10 11:48:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:48:13,769 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-01-10 11:48:13,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-01-10 11:48:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 11:48:13,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:48:13,770 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:48:13,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 11:48:13,971 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,SelfDestructingSolverStorable3 [2022-01-10 11:48:13,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:48:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:48:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1461511674, now seen corresponding path program 3 times [2022-01-10 11:48:13,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:48:13,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882032357] [2022-01-10 11:48:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:48:13,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:48:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:48:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:48:14,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:48:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882032357] [2022-01-10 11:48:14,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882032357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:48:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83255040] [2022-01-10 11:48:14,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 11:48:14,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:48:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:48:14,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 11:48:14,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 11:48:14,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 11:48:14,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 11:48:14,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 11:48:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:48:56,832 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-01-10 11:48:56,833 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 101 [2022-01-10 11:48:56,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-01-10 11:48:56,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-10 11:48:56,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-01-10 11:48:56,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97884503] [2022-01-10 11:48:56,834 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-10 11:48:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 11:48:56,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:48:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 11:48:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 11:48:56,835 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 11:48:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 11:48:56,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 11:48:56,837 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 11:48:56,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:48:56,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 11:48:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:48:57,040 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@67ae2d4f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-10 11:48:57,042 INFO L158 Benchmark]: Toolchain (without parser) took 58251.61ms. Allocated memory was 198.2MB in the beginning and 255.9MB in the end (delta: 57.7MB). Free memory was 147.7MB in the beginning and 99.3MB in the end (delta: 48.4MB). Peak memory consumption was 106.9MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,043 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 164.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 11:48:57,043 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.25ms. Allocated memory is still 198.2MB. Free memory was 147.4MB in the beginning and 174.7MB in the end (delta: -27.3MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,043 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.98ms. Allocated memory is still 198.2MB. Free memory was 174.7MB in the beginning and 173.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,043 INFO L158 Benchmark]: Boogie Preprocessor took 26.38ms. Allocated memory is still 198.2MB. Free memory was 173.1MB in the beginning and 172.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,043 INFO L158 Benchmark]: RCFGBuilder took 226.25ms. Allocated memory is still 198.2MB. Free memory was 172.0MB in the beginning and 162.6MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,044 INFO L158 Benchmark]: IcfgTransformer took 67.66ms. Allocated memory is still 198.2MB. Free memory was 162.6MB in the beginning and 160.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,044 INFO L158 Benchmark]: TraceAbstraction took 57679.12ms. Allocated memory was 198.2MB in the beginning and 255.9MB in the end (delta: 57.7MB). Free memory was 159.5MB in the beginning and 99.3MB in the end (delta: 60.2MB). Peak memory consumption was 117.3MB. Max. memory is 8.0GB. [2022-01-10 11:48:57,045 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 164.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 223.25ms. Allocated memory is still 198.2MB. Free memory was 147.4MB in the beginning and 174.7MB in the end (delta: -27.3MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.98ms. Allocated memory is still 198.2MB. Free memory was 174.7MB in the beginning and 173.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.38ms. Allocated memory is still 198.2MB. Free memory was 173.1MB in the beginning and 172.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 226.25ms. Allocated memory is still 198.2MB. Free memory was 172.0MB in the beginning and 162.6MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 67.66ms. Allocated memory is still 198.2MB. Free memory was 162.6MB in the beginning and 160.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 57679.12ms. Allocated memory was 198.2MB in the beginning and 255.9MB in the end (delta: 57.7MB). Free memory was 159.5MB in the beginning and 99.3MB in the end (delta: 60.2MB). Peak memory consumption was 117.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@67ae2d4f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@67ae2d4f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...