/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 19:33:22,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 19:33:22,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 19:33:23,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 19:33:23,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 19:33:23,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 19:33:23,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 19:33:23,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 19:33:23,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 19:33:23,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 19:33:23,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 19:33:23,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 19:33:23,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 19:33:23,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 19:33:23,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 19:33:23,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 19:33:23,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 19:33:23,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 19:33:23,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 19:33:23,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 19:33:23,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 19:33:23,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 19:33:23,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 19:33:23,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 19:33:23,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 19:33:23,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 19:33:23,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 19:33:23,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 19:33:23,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 19:33:23,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 19:33:23,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 19:33:23,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 19:33:23,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 19:33:23,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 19:33:23,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 19:33:23,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 19:33:23,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 19:33:23,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 19:33:23,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 19:33:23,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 19:33:23,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 19:33:23,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-12 19:33:23,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 19:33:23,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 19:33:23,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 19:33:23,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 19:33:23,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 19:33:23,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 19:33:23,073 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 19:33:23,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 19:33:23,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 19:33:23,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 19:33:23,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 19:33:23,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 19:33:23,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 19:33:23,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 19:33:23,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 19:33:23,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 19:33:23,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 19:33:23,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 19:33:23,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 19:33:23,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 19:33:23,311 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 19:33:23,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-12-12 19:33:24,207 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 19:33:24,343 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 19:33:24,344 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2022-12-12 19:33:24,348 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f530c807b/80645e8af737417397dc337601bf5301/FLAG09037ffd2 [2022-12-12 19:33:24,362 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f530c807b/80645e8af737417397dc337601bf5301 [2022-12-12 19:33:24,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 19:33:24,368 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 19:33:24,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 19:33:24,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 19:33:24,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 19:33:24,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5b836f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24, skipping insertion in model container [2022-12-12 19:33:24,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 19:33:24,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 19:33:24,520 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2022-12-12 19:33:24,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 19:33:24,529 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 19:33:24,549 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2022-12-12 19:33:24,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 19:33:24,563 INFO L208 MainTranslator]: Completed translation [2022-12-12 19:33:24,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24 WrapperNode [2022-12-12 19:33:24,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 19:33:24,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 19:33:24,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 19:33:24,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 19:33:24,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,592 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-12-12 19:33:24,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 19:33:24,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 19:33:24,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 19:33:24,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 19:33:24,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 19:33:24,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 19:33:24,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 19:33:24,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 19:33:24,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (1/1) ... [2022-12-12 19:33:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 19:33:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:24,652 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) [2022-12-12 19:33:24,673 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 [2022-12-12 19:33:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 19:33:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 19:33:24,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 19:33:24,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 19:33:24,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 19:33:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 19:33:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 19:33:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 19:33:24,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 19:33:24,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 19:33:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 19:33:24,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 19:33:24,696 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 19:33:24,769 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 19:33:24,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 19:33:24,896 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 19:33:24,900 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 19:33:24,901 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 19:33:24,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 07:33:24 BoogieIcfgContainer [2022-12-12 19:33:24,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 19:33:24,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 19:33:24,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 19:33:24,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 19:33:24,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 07:33:24" (1/3) ... [2022-12-12 19:33:24,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71aabd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 07:33:24, skipping insertion in model container [2022-12-12 19:33:24,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 07:33:24" (2/3) ... [2022-12-12 19:33:24,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71aabd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 07:33:24, skipping insertion in model container [2022-12-12 19:33:24,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 07:33:24" (3/3) ... [2022-12-12 19:33:24,907 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2022-12-12 19:33:24,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 19:33:24,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 19:33:24,919 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 19:33:24,975 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 19:33:25,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 75 transitions, 166 flow [2022-12-12 19:33:25,063 INFO L130 PetriNetUnfolder]: 5/73 cut-off events. [2022-12-12 19:33:25,063 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 19:33:25,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-12 19:33:25,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 75 transitions, 166 flow [2022-12-12 19:33:25,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 142 flow [2022-12-12 19:33:25,072 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 19:33:25,087 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 142 flow [2022-12-12 19:33:25,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2022-12-12 19:33:25,119 INFO L130 PetriNetUnfolder]: 5/65 cut-off events. [2022-12-12 19:33:25,119 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 19:33:25,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 5/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-12-12 19:33:25,121 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 142 flow [2022-12-12 19:33:25,122 INFO L226 LiptonReduction]: Number of co-enabled transitions 500 [2022-12-12 19:33:26,622 INFO L241 LiptonReduction]: Total number of compositions: 50 [2022-12-12 19:33:26,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 19:33:26,635 INFO L357 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=false, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3ff289e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 19:33:26,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 19:33:26,638 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-12 19:33:26,638 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 19:33:26,639 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:26,639 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:26,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash 948435928, now seen corresponding path program 1 times [2022-12-12 19:33:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:26,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501602154] [2022-12-12 19:33:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:27,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:27,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501602154] [2022-12-12 19:33:27,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501602154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 19:33:27,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 19:33:27,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 19:33:27,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656238338] [2022-12-12 19:33:27,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 19:33:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 19:33:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 19:33:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 19:33:27,053 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-12 19:33:27,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-12-12 19:33:27,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:27,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-12 19:33:27,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:27,109 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2022-12-12 19:33:27,109 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-12 19:33:27,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 323 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2022-12-12 19:33:27,111 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2022-12-12 19:33:27,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2022-12-12 19:33:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 19:33:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 19:33:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 30 transitions. [2022-12-12 19:33:27,118 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2022-12-12 19:33:27,121 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2022-12-12 19:33:27,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 25 transitions, 117 flow [2022-12-12 19:33:27,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 24 transitions, 110 flow [2022-12-12 19:33:27,123 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 24 transitions, 110 flow [2022-12-12 19:33:27,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-12-12 19:33:27,123 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:27,123 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:27,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 19:33:27,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:27,130 INFO L85 PathProgramCache]: Analyzing trace with hash -285936356, now seen corresponding path program 1 times [2022-12-12 19:33:27,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:27,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553180247] [2022-12-12 19:33:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:27,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:27,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553180247] [2022-12-12 19:33:27,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553180247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231629182] [2022-12-12 19:33:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:27,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:27,367 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) [2022-12-12 19:33:27,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 19:33:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-12 19:33:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:27,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:33:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:27,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231629182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 19:33:27,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 19:33:27,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-12-12 19:33:27,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607088754] [2022-12-12 19:33:27,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 19:33:27,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 19:33:27,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:27,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 19:33:27,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-12 19:33:27,813 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 19:33:27,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 24 transitions, 110 flow. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2022-12-12 19:33:27,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:27,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 19:33:27,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:27,940 INFO L130 PetriNetUnfolder]: 75/136 cut-off events. [2022-12-12 19:33:27,940 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-12-12 19:33:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 136 events. 75/136 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 422 event pairs, 1 based on Foata normal form. 1/97 useless extension candidates. Maximal degree in co-relation 330. Up to 94 conditions per place. [2022-12-12 19:33:27,941 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 21 selfloop transitions, 5 changer transitions 14/41 dead transitions. [2022-12-12 19:33:27,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 41 transitions, 268 flow [2022-12-12 19:33:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 19:33:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 19:33:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2022-12-12 19:33:27,942 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2022-12-12 19:33:27,943 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2022-12-12 19:33:27,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 41 transitions, 268 flow [2022-12-12 19:33:27,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 27 transitions, 172 flow [2022-12-12 19:33:27,944 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 172 flow [2022-12-12 19:33:27,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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) [2022-12-12 19:33:27,944 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:27,944 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:27,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 19:33:28,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:28,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1624430121, now seen corresponding path program 1 times [2022-12-12 19:33:28,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:28,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257777742] [2022-12-12 19:33:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:28,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:28,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:28,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257777742] [2022-12-12 19:33:28,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257777742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984745721] [2022-12-12 19:33:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:28,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:28,281 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) [2022-12-12 19:33:28,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 19:33:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 19:33:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:28,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:33:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984745721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 19:33:28,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 19:33:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-12-12 19:33:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423410613] [2022-12-12 19:33:28,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 19:33:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 19:33:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 19:33:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-12 19:33:28,611 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 19:33:28,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 172 flow. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2022-12-12 19:33:28,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:28,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 19:33:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:28,759 INFO L130 PetriNetUnfolder]: 60/114 cut-off events. [2022-12-12 19:33:28,760 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-12-12 19:33:28,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 114 events. 60/114 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 279 event pairs, 8 based on Foata normal form. 1/93 useless extension candidates. Maximal degree in co-relation 360. Up to 80 conditions per place. [2022-12-12 19:33:28,761 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 24 selfloop transitions, 6 changer transitions 14/44 dead transitions. [2022-12-12 19:33:28,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 360 flow [2022-12-12 19:33:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 19:33:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 19:33:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 38 transitions. [2022-12-12 19:33:28,762 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2022-12-12 19:33:28,762 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2022-12-12 19:33:28,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 44 transitions, 360 flow [2022-12-12 19:33:28,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 30 transitions, 244 flow [2022-12-12 19:33:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 244 flow [2022-12-12 19:33:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2022-12-12 19:33:28,764 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:28,764 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:28,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 19:33:28,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-12 19:33:28,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 399141847, now seen corresponding path program 2 times [2022-12-12 19:33:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:28,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658778795] [2022-12-12 19:33:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:29,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658778795] [2022-12-12 19:33:29,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658778795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356012625] [2022-12-12 19:33:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 19:33:29,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:29,126 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) [2022-12-12 19:33:29,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 19:33:29,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 19:33:29,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 19:33:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 19:33:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:29,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:33:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:29,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356012625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 19:33:29,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 19:33:29,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2022-12-12 19:33:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462895816] [2022-12-12 19:33:29,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 19:33:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 19:33:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 19:33:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-12-12 19:33:29,371 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 19:33:29,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 244 flow. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 19:33:29,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:29,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 19:33:29,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:29,563 INFO L130 PetriNetUnfolder]: 113/211 cut-off events. [2022-12-12 19:33:29,563 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2022-12-12 19:33:29,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 211 events. 113/211 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 676 event pairs, 8 based on Foata normal form. 3/162 useless extension candidates. Maximal degree in co-relation 861. Up to 192 conditions per place. [2022-12-12 19:33:29,565 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 43 selfloop transitions, 20 changer transitions 12/75 dead transitions. [2022-12-12 19:33:29,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 75 transitions, 779 flow [2022-12-12 19:33:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 19:33:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 19:33:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 74 transitions. [2022-12-12 19:33:29,567 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2022-12-12 19:33:29,568 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-12-12 19:33:29,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 75 transitions, 779 flow [2022-12-12 19:33:29,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 63 transitions, 641 flow [2022-12-12 19:33:29,569 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 63 transitions, 641 flow [2022-12-12 19:33:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 19:33:29,570 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:29,570 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:29,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 19:33:29,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:29,774 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1425111903, now seen corresponding path program 3 times [2022-12-12 19:33:29,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:29,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547089725] [2022-12-12 19:33:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:29,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547089725] [2022-12-12 19:33:29,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547089725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:29,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181481599] [2022-12-12 19:33:29,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 19:33:29,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:29,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:29,947 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) [2022-12-12 19:33:29,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 19:33:29,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 19:33:29,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 19:33:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-12 19:33:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:33:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:30,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181481599] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 19:33:30,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 19:33:30,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2022-12-12 19:33:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113114615] [2022-12-12 19:33:30,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 19:33:30,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 19:33:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 19:33:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-12-12 19:33:30,221 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 19:33:30,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 63 transitions, 641 flow. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 19:33:30,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:30,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 19:33:30,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:30,412 INFO L130 PetriNetUnfolder]: 124/242 cut-off events. [2022-12-12 19:33:30,413 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-12 19:33:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 242 events. 124/242 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 852 event pairs, 4 based on Foata normal form. 3/185 useless extension candidates. Maximal degree in co-relation 1226. Up to 223 conditions per place. [2022-12-12 19:33:30,414 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 63 selfloop transitions, 18 changer transitions 12/93 dead transitions. [2022-12-12 19:33:30,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 93 transitions, 1151 flow [2022-12-12 19:33:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 19:33:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 19:33:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 68 transitions. [2022-12-12 19:33:30,416 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2022-12-12 19:33:30,416 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2022-12-12 19:33:30,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 93 transitions, 1151 flow [2022-12-12 19:33:30,418 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 81 transitions, 989 flow [2022-12-12 19:33:30,418 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 81 transitions, 989 flow [2022-12-12 19:33:30,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 19:33:30,418 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:30,418 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:30,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 19:33:30,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:30,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1852765230, now seen corresponding path program 2 times [2022-12-12 19:33:30,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:30,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911296916] [2022-12-12 19:33:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:30,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:30,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911296916] [2022-12-12 19:33:30,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911296916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:30,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764026496] [2022-12-12 19:33:30,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 19:33:30,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:30,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:30,791 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) [2022-12-12 19:33:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 19:33:30,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 19:33:30,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 19:33:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 19:33:30,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:30,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:33:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:31,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764026496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 19:33:31,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 19:33:31,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-12 19:33:31,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538457162] [2022-12-12 19:33:31,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 19:33:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 19:33:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 19:33:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-12 19:33:31,040 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 19:33:31,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 81 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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) [2022-12-12 19:33:31,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:31,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 19:33:31,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:31,206 INFO L130 PetriNetUnfolder]: 159/315 cut-off events. [2022-12-12 19:33:31,206 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2022-12-12 19:33:31,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193 conditions, 315 events. 159/315 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1260 event pairs, 6 based on Foata normal form. 3/236 useless extension candidates. Maximal degree in co-relation 1921. Up to 296 conditions per place. [2022-12-12 19:33:31,209 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 87 selfloop transitions, 16 changer transitions 6/113 dead transitions. [2022-12-12 19:33:31,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 113 transitions, 1615 flow [2022-12-12 19:33:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 19:33:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 19:33:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2022-12-12 19:33:31,210 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2022-12-12 19:33:31,210 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2022-12-12 19:33:31,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 113 transitions, 1615 flow [2022-12-12 19:33:31,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 107 transitions, 1522 flow [2022-12-12 19:33:31,212 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 107 transitions, 1522 flow [2022-12-12 19:33:31,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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) [2022-12-12 19:33:31,213 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:31,213 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:31,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 19:33:31,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:31,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1258834054, now seen corresponding path program 3 times [2022-12-12 19:33:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:31,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890961374] [2022-12-12 19:33:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:31,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:31,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890961374] [2022-12-12 19:33:31,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890961374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:31,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163561777] [2022-12-12 19:33:31,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 19:33:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:31,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:31,567 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) [2022-12-12 19:33:31,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 19:33:31,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 19:33:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 19:33:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-12 19:33:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:31,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:33:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 19:33:31,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163561777] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:31,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 19:33:31,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-12-12 19:33:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851476818] [2022-12-12 19:33:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 19:33:31,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 19:33:31,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 19:33:31,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 19:33:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-12-12 19:33:31,814 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 19:33:31,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 107 transitions, 1522 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 19:33:31,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 19:33:31,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 19:33:31,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 19:33:31,868 INFO L130 PetriNetUnfolder]: 164/326 cut-off events. [2022-12-12 19:33:31,868 INFO L131 PetriNetUnfolder]: For 333/333 co-relation queries the response was YES. [2022-12-12 19:33:31,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 326 events. 164/326 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1323 event pairs, 0 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 2290. Up to 307 conditions per place. [2022-12-12 19:33:31,870 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 102 selfloop transitions, 10 changer transitions 2/118 dead transitions. [2022-12-12 19:33:31,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 118 transitions, 1910 flow [2022-12-12 19:33:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 19:33:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 19:33:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-12 19:33:31,871 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-12 19:33:31,872 INFO L295 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2022-12-12 19:33:31,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 118 transitions, 1910 flow [2022-12-12 19:33:31,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 116 transitions, 1875 flow [2022-12-12 19:33:31,875 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 116 transitions, 1875 flow [2022-12-12 19:33:31,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 19:33:31,875 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 19:33:31,875 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 19:33:31,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 19:33:32,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:32,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 19:33:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 19:33:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1470750661, now seen corresponding path program 1 times [2022-12-12 19:33:32,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 19:33:32,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376243671] [2022-12-12 19:33:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:32,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 19:33:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:32,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 19:33:32,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376243671] [2022-12-12 19:33:32,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376243671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 19:33:32,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283432170] [2022-12-12 19:33:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 19:33:32,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 19:33:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 19:33:32,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 19:33:32,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 19:33:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 19:33:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 19:33:32,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 19:33:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 19:33:36,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 19:38:13,517 WARN L233 SmtUtils]: Spent 26.09s on a formula simplification. DAG size of input: 5213 DAG size of output: 5067 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2022-12-12 19:47:53,521 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 19:47:53,521 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 19:47:54,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 19:47:54,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown