./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:26:09,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:26:09,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:26:09,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:26:09,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:26:09,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:26:09,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:26:09,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:26:09,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:26:09,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:26:09,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:26:09,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:26:09,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:26:09,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:26:09,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:26:09,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:26:09,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:26:09,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:26:09,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:26:09,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:26:09,541 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:26:09,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:26:09,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:26:09,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:26:09,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:26:09,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:26:09,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:26:09,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:26:09,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:26:09,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:26:09,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:26:09,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:26:09,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:26:09,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:26:09,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:26:09,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:26:09,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:26:09,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:26:09,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:26:09,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:26:09,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:26:09,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:26:09,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:26:09,592 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:26:09,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:26:09,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:26:09,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:26:09,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:26:09,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:26:09,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:26:09,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:26:09,595 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:26:09,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:26:09,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:26:09,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:26:09,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:26:09,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:26:09,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:26:09,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:26:09,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:26:09,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:26:09,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:26:09,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:26:09,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:26:09,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:26:09,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:26:09,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:26:09,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:26:09,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:26:09,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:26:09,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:26:09,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:26:09,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:26:09,602 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:26:09,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:26:09,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:26:09,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-07-12 10:26:09,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:26:09,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:26:09,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:26:09,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:26:09,891 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:26:09,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-12 10:26:09,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75533578/70d232a56511453992219dac782e9452/FLAG7a9527096 [2022-07-12 10:26:10,307 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:26:10,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-07-12 10:26:10,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75533578/70d232a56511453992219dac782e9452/FLAG7a9527096 [2022-07-12 10:26:10,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75533578/70d232a56511453992219dac782e9452 [2022-07-12 10:26:10,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:26:10,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:26:10,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:26:10,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:26:10,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:26:10,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:10,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6252969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10, skipping insertion in model container [2022-07-12 10:26:10,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:10,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:26:10,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:26:10,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-07-12 10:26:10,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:26:10,949 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:26:10,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-07-12 10:26:10,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:26:10,977 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:26:10,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10 WrapperNode [2022-07-12 10:26:10,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:26:10,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:26:10,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:26:10,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:26:10,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:10,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,013 INFO L137 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-12 10:26:11,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:26:11,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:26:11,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:26:11,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:26:11,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:26:11,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:26:11,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:26:11,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:26:11,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (1/1) ... [2022-07-12 10:26:11,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:26:11,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:11,107 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) [2022-07-12 10:26:11,113 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 [2022-07-12 10:26:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:26:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:26:11,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:26:11,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:26:11,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:26:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:26:11,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:26:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:26:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:26:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:26:11,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:26:11,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:26:11,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:26:11,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:26:11,142 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:26:11,209 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:26:11,210 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:26:11,435 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:26:11,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:26:11,443 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:26:11,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:26:11 BoogieIcfgContainer [2022-07-12 10:26:11,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:26:11,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:26:11,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:26:11,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:26:11,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:26:10" (1/3) ... [2022-07-12 10:26:11,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddd62b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:26:11, skipping insertion in model container [2022-07-12 10:26:11,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:26:10" (2/3) ... [2022-07-12 10:26:11,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddd62b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:26:11, skipping insertion in model container [2022-07-12 10:26:11,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:26:11" (3/3) ... [2022-07-12 10:26:11,453 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-07-12 10:26:11,457 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:26:11,465 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:26:11,465 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:26:11,466 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:26:11,523 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:26:11,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-07-12 10:26:11,602 INFO L129 PetriNetUnfolder]: 7/104 cut-off events. [2022-07-12 10:26:11,602 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:26:11,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-07-12 10:26:11,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-07-12 10:26:11,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-07-12 10:26:11,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:26:11,634 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=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@64942aa5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@290324fb [2022-07-12 10:26:11,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:26:11,673 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2022-07-12 10:26:11,674 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:26:11,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:11,675 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:11,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:26:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash 10639135, now seen corresponding path program 1 times [2022-07-12 10:26:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:11,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091572144] [2022-07-12 10:26:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:11,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:11,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091572144] [2022-07-12 10:26:11,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091572144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:11,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:11,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:26:11,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642761100] [2022-07-12 10:26:11,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:26:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:11,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:26:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:26:11,987 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 107 [2022-07-12 10:26:11,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 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) [2022-07-12 10:26:11,993 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:11,993 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 107 [2022-07-12 10:26:11,994 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:12,060 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-12 10:26:12,060 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:26:12,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 89 events. 3/89 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 10/95 useless extension candidates. Maximal degree in co-relation 66. Up to 7 conditions per place. [2022-07-12 10:26:12,064 INFO L132 encePairwiseOnDemand]: 103/107 looper letters, 6 selfloop transitions, 0 changer transitions 1/89 dead transitions. [2022-07-12 10:26:12,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 208 flow [2022-07-12 10:26:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:26:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:26:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-07-12 10:26:12,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9439252336448598 [2022-07-12 10:26:12,080 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-07-12 10:26:12,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-07-12 10:26:12,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:12,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-07-12 10:26:12,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 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) [2022-07-12 10:26:12,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-07-12 10:26:12,090 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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) [2022-07-12 10:26:12,092 INFO L186 Difference]: Start difference. First operand has 96 places, 93 transitions, 204 flow. Second operand 2 states and 202 transitions. [2022-07-12 10:26:12,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 208 flow [2022-07-12 10:26:12,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:26:12,103 INFO L242 Difference]: Finished difference. Result has 91 places, 88 transitions, 182 flow [2022-07-12 10:26:12,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2022-07-12 10:26:12,108 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -5 predicate places. [2022-07-12 10:26:12,108 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 182 flow [2022-07-12 10:26:12,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 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) [2022-07-12 10:26:12,109 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:12,109 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:12,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:26:12,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:26:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash -489038424, now seen corresponding path program 1 times [2022-07-12 10:26:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092765392] [2022-07-12 10:26:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092765392] [2022-07-12 10:26:12,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092765392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:12,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:26:12,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723279503] [2022-07-12 10:26:12,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:26:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:26:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:26:12,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 107 [2022-07-12 10:26:12,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 states have internal predecessors, (608), 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) [2022-07-12 10:26:12,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:12,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 107 [2022-07-12 10:26:12,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:12,608 INFO L129 PetriNetUnfolder]: 53/322 cut-off events. [2022-07-12 10:26:12,609 INFO L130 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-07-12 10:26:12,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 322 events. 53/322 cut-off events. For 22/23 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1277 event pairs, 7 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 432. Up to 52 conditions per place. [2022-07-12 10:26:12,615 INFO L132 encePairwiseOnDemand]: 98/107 looper letters, 35 selfloop transitions, 9 changer transitions 4/120 dead transitions. [2022-07-12 10:26:12,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 120 transitions, 354 flow [2022-07-12 10:26:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:26:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:26:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 644 transitions. [2022-07-12 10:26:12,623 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8598130841121495 [2022-07-12 10:26:12,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 644 transitions. [2022-07-12 10:26:12,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 644 transitions. [2022-07-12 10:26:12,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:12,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 644 transitions. [2022-07-12 10:26:12,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 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) [2022-07-12 10:26:12,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 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) [2022-07-12 10:26:12,632 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 107.0) internal successors, (856), 8 states have internal predecessors, (856), 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) [2022-07-12 10:26:12,632 INFO L186 Difference]: Start difference. First operand has 91 places, 88 transitions, 182 flow. Second operand 7 states and 644 transitions. [2022-07-12 10:26:12,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 120 transitions, 354 flow [2022-07-12 10:26:12,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:26:12,637 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 235 flow [2022-07-12 10:26:12,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2022-07-12 10:26:12,638 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2022-07-12 10:26:12,638 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 235 flow [2022-07-12 10:26:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.85714285714286) internal successors, (608), 7 states have internal predecessors, (608), 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) [2022-07-12 10:26:12,639 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:12,639 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:12,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:26:12,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:26:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1351944439, now seen corresponding path program 1 times [2022-07-12 10:26:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:12,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32305095] [2022-07-12 10:26:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:12,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32305095] [2022-07-12 10:26:12,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32305095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:12,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311842466] [2022-07-12 10:26:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:12,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:12,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:12,956 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) [2022-07-12 10:26:12,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:26:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:26:13,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:14,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:15,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311842466] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:15,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:15,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 13 [2022-07-12 10:26:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731825863] [2022-07-12 10:26:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:15,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:26:15,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:26:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:26:15,621 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-12 10:26:15,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 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) [2022-07-12 10:26:15,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:15,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-12 10:26:15,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:16,193 INFO L129 PetriNetUnfolder]: 1986/4368 cut-off events. [2022-07-12 10:26:16,193 INFO L130 PetriNetUnfolder]: For 385/387 co-relation queries the response was YES. [2022-07-12 10:26:16,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7855 conditions, 4368 events. 1986/4368 cut-off events. For 385/387 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35893 event pairs, 405 based on Foata normal form. 1/3597 useless extension candidates. Maximal degree in co-relation 7847. Up to 1351 conditions per place. [2022-07-12 10:26:16,233 INFO L132 encePairwiseOnDemand]: 93/107 looper letters, 80 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2022-07-12 10:26:16,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 193 transitions, 697 flow [2022-07-12 10:26:16,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:26:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:26:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 895 transitions. [2022-07-12 10:26:16,237 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8364485981308412 [2022-07-12 10:26:16,237 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 895 transitions. [2022-07-12 10:26:16,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 895 transitions. [2022-07-12 10:26:16,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:16,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 895 transitions. [2022-07-12 10:26:16,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.5) internal successors, (895), 10 states have internal predecessors, (895), 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) [2022-07-12 10:26:16,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 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) [2022-07-12 10:26:16,242 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 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) [2022-07-12 10:26:16,243 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 235 flow. Second operand 10 states and 895 transitions. [2022-07-12 10:26:16,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 193 transitions, 697 flow [2022-07-12 10:26:16,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 193 transitions, 693 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-12 10:26:16,249 INFO L242 Difference]: Finished difference. Result has 111 places, 136 transitions, 511 flow [2022-07-12 10:26:16,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=511, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2022-07-12 10:26:16,250 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 15 predicate places. [2022-07-12 10:26:16,250 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 511 flow [2022-07-12 10:26:16,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 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) [2022-07-12 10:26:16,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:16,251 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:16,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:16,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:16,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:26:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1429961801, now seen corresponding path program 2 times [2022-07-12 10:26:16,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:16,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260231929] [2022-07-12 10:26:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260231929] [2022-07-12 10:26:16,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260231929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597519702] [2022-07-12 10:26:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:26:16,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:16,735 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) [2022-07-12 10:26:16,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:26:16,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:26:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:16,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:26:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:17,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:20,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597519702] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:20,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:20,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 12 [2022-07-12 10:26:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958879837] [2022-07-12 10:26:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:20,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:26:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:20,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:26:20,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:26:20,438 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 107 [2022-07-12 10:26:20,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 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) [2022-07-12 10:26:20,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:20,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 107 [2022-07-12 10:26:20,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:21,377 INFO L129 PetriNetUnfolder]: 2061/4718 cut-off events. [2022-07-12 10:26:21,377 INFO L130 PetriNetUnfolder]: For 4342/4571 co-relation queries the response was YES. [2022-07-12 10:26:21,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12376 conditions, 4718 events. 2061/4718 cut-off events. For 4342/4571 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41500 event pairs, 217 based on Foata normal form. 44/4469 useless extension candidates. Maximal degree in co-relation 12364. Up to 816 conditions per place. [2022-07-12 10:26:21,421 INFO L132 encePairwiseOnDemand]: 99/107 looper letters, 248 selfloop transitions, 56 changer transitions 0/376 dead transitions. [2022-07-12 10:26:21,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 376 transitions, 2393 flow [2022-07-12 10:26:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:26:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:26:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 917 transitions. [2022-07-12 10:26:21,424 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8570093457943925 [2022-07-12 10:26:21,424 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 917 transitions. [2022-07-12 10:26:21,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 917 transitions. [2022-07-12 10:26:21,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:21,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 917 transitions. [2022-07-12 10:26:21,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.7) internal successors, (917), 10 states have internal predecessors, (917), 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) [2022-07-12 10:26:21,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 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) [2022-07-12 10:26:21,430 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 107.0) internal successors, (1177), 11 states have internal predecessors, (1177), 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) [2022-07-12 10:26:21,431 INFO L186 Difference]: Start difference. First operand has 111 places, 136 transitions, 511 flow. Second operand 10 states and 917 transitions. [2022-07-12 10:26:21,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 376 transitions, 2393 flow [2022-07-12 10:26:21,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 376 transitions, 2393 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:26:21,459 INFO L242 Difference]: Finished difference. Result has 129 places, 185 transitions, 1030 flow [2022-07-12 10:26:21,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1030, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2022-07-12 10:26:21,461 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 33 predicate places. [2022-07-12 10:26:21,461 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 1030 flow [2022-07-12 10:26:21,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.66666666666667) internal successors, (496), 6 states have internal predecessors, (496), 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) [2022-07-12 10:26:21,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:21,462 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:21,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:26:21,683 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,SelfDestructingSolverStorable3 [2022-07-12 10:26:21,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:26:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:21,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1619176265, now seen corresponding path program 3 times [2022-07-12 10:26:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:21,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535009429] [2022-07-12 10:26:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:21,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535009429] [2022-07-12 10:26:21,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535009429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:21,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196348412] [2022-07-12 10:26:21,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:26:21,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:21,900 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) [2022-07-12 10:26:21,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:26:22,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:26:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:26:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:22,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196348412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:22,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:22,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-12 10:26:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319002652] [2022-07-12 10:26:22,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:22,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:26:22,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:26:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:26:22,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 107 [2022-07-12 10:26:22,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 1030 flow. Second operand has 14 states, 14 states have (on average 79.42857142857143) internal successors, (1112), 14 states have internal predecessors, (1112), 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) [2022-07-12 10:26:22,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:22,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 107 [2022-07-12 10:26:22,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:23,677 INFO L129 PetriNetUnfolder]: 3604/8239 cut-off events. [2022-07-12 10:26:23,677 INFO L130 PetriNetUnfolder]: For 19069/19618 co-relation queries the response was YES. [2022-07-12 10:26:23,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26011 conditions, 8239 events. 3604/8239 cut-off events. For 19069/19618 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 77255 event pairs, 556 based on Foata normal form. 91/8211 useless extension candidates. Maximal degree in co-relation 25990. Up to 1310 conditions per place. [2022-07-12 10:26:23,778 INFO L132 encePairwiseOnDemand]: 94/107 looper letters, 260 selfloop transitions, 144 changer transitions 6/479 dead transitions. [2022-07-12 10:26:23,779 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 479 transitions, 3728 flow [2022-07-12 10:26:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 10:26:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-12 10:26:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1399 transitions. [2022-07-12 10:26:23,783 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8171728971962616 [2022-07-12 10:26:23,783 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1399 transitions. [2022-07-12 10:26:23,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1399 transitions. [2022-07-12 10:26:23,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:23,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1399 transitions. [2022-07-12 10:26:23,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.4375) internal successors, (1399), 16 states have internal predecessors, (1399), 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) [2022-07-12 10:26:23,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 107.0) internal successors, (1819), 17 states have internal predecessors, (1819), 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) [2022-07-12 10:26:23,830 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 107.0) internal successors, (1819), 17 states have internal predecessors, (1819), 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) [2022-07-12 10:26:23,830 INFO L186 Difference]: Start difference. First operand has 129 places, 185 transitions, 1030 flow. Second operand 16 states and 1399 transitions. [2022-07-12 10:26:23,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 479 transitions, 3728 flow [2022-07-12 10:26:23,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 479 transitions, 3712 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-07-12 10:26:23,910 INFO L242 Difference]: Finished difference. Result has 155 places, 280 transitions, 2389 flow [2022-07-12 10:26:23,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2389, PETRI_PLACES=155, PETRI_TRANSITIONS=280} [2022-07-12 10:26:23,912 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 59 predicate places. [2022-07-12 10:26:23,912 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 280 transitions, 2389 flow [2022-07-12 10:26:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 79.42857142857143) internal successors, (1112), 14 states have internal predecessors, (1112), 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) [2022-07-12 10:26:23,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:23,913 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:26:23,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:26:24,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:24,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:26:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1111005849, now seen corresponding path program 4 times [2022-07-12 10:26:24,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:24,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470329439] [2022-07-12 10:26:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:24,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:24,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470329439] [2022-07-12 10:26:24,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470329439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853466730] [2022-07-12 10:26:24,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:26:24,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:24,299 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) [2022-07-12 10:26:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:26:24,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:26:24,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:24,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:26:24,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:24,692 INFO L328 TraceCheckSpWp]: Computing backward predicates...