./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/parallel-bakery-4.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 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:28:28,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:28:28,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:28:28,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:28:28,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:28:28,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:28:28,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:28:28,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:28:28,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:28:28,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:28:28,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:28:28,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:28:28,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:28:28,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:28:28,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:28:28,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:28:28,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:28:28,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:28:28,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:28:28,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:28:28,632 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:28:28,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:28:28,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:28:28,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:28:28,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:28:28,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:28:28,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:28:28,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:28:28,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:28:28,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:28:28,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:28:28,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:28:28,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:28:28,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:28:28,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:28:28,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:28:28,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:28:28,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:28:28,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:28:28,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:28:28,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:28:28,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:28:28,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:28:28,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:28:28,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:28:28,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:28:28,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:28:28,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:28:28,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:28:28,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:28:28,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:28:28,674 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:28:28,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:28:28,675 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:28:28,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:28:28,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:28:28,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:28:28,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:28:28,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:28:28,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:28:28,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:28:28,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:28:28,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:28:28,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:28:28,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:28:28,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:28:28,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:28:28,678 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:28:28,678 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:28:28,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:28:28,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2022-07-19 21:28:28,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:28:28,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:28:28,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:28:28,868 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:28:28,869 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:28:28,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-07-19 21:28:28,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f281ca10/9ae5d8c0b3b348f882d33a01bc634538/FLAG7ef455375 [2022-07-19 21:28:29,355 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:28:29,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-07-19 21:28:29,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f281ca10/9ae5d8c0b3b348f882d33a01bc634538/FLAG7ef455375 [2022-07-19 21:28:29,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f281ca10/9ae5d8c0b3b348f882d33a01bc634538 [2022-07-19 21:28:29,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:28:29,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:28:29,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:28:29,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:28:29,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:28:29,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:29,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4fcc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29, skipping insertion in model container [2022-07-19 21:28:29,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:29,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:28:29,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:28:29,930 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/parallel-bakery-4.wvr.c[7978,7991] [2022-07-19 21:28:29,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:28:29,937 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:28:29,964 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/parallel-bakery-4.wvr.c[7978,7991] [2022-07-19 21:28:29,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:28:29,982 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:28:29,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29 WrapperNode [2022-07-19 21:28:29,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:28:29,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:28:29,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:28:29,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:28:29,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:29,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,015 INFO L137 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 440 [2022-07-19 21:28:30,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:28:30,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:28:30,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:28:30,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:28:30,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:28:30,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:28:30,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:28:30,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:28:30,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (1/1) ... [2022-07-19 21:28:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:28:30,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:28:30,087 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) [2022-07-19 21:28:30,091 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 [2022-07-19 21:28:30,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:28:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:28:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:28:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:28:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:28:30,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:28:30,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-19 21:28:30,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:28:30,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:28:30,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:28:30,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:28:30,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:28:30,119 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:28:30,211 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:28:30,212 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:28:30,588 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:28:30,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:28:30,722 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 21:28:30,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:30 BoogieIcfgContainer [2022-07-19 21:28:30,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:28:30,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:28:30,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:28:30,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:28:30,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:28:29" (1/3) ... [2022-07-19 21:28:30,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ad0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:30, skipping insertion in model container [2022-07-19 21:28:30,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:28:29" (2/3) ... [2022-07-19 21:28:30,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ad0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:28:30, skipping insertion in model container [2022-07-19 21:28:30,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:28:30" (3/3) ... [2022-07-19 21:28:30,732 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2022-07-19 21:28:30,736 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:28:30,742 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:28:30,742 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:28:30,742 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:28:30,812 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:28:30,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 436 flow [2022-07-19 21:28:30,905 INFO L129 PetriNetUnfolder]: 2/198 cut-off events. [2022-07-19 21:28:30,905 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:28:30,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 198 events. 2/198 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 206 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-07-19 21:28:30,907 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 202 transitions, 436 flow [2022-07-19 21:28:30,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 185 transitions, 394 flow [2022-07-19 21:28:30,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:28:30,921 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@2ab51070, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@49f3316f [2022-07-19 21:28:30,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:28:30,948 INFO L129 PetriNetUnfolder]: 2/184 cut-off events. [2022-07-19 21:28:30,949 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:28:30,949 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:30,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:30,950 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 2 more)] === [2022-07-19 21:28:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash 560411039, now seen corresponding path program 1 times [2022-07-19 21:28:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398588359] [2022-07-19 21:28:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:31,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:31,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398588359] [2022-07-19 21:28:31,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398588359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:31,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:31,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-19 21:28:31,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740083506] [2022-07-19 21:28:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:31,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 21:28:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 21:28:31,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-07-19 21:28:31,745 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 202 [2022-07-19 21:28:31,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 185 transitions, 394 flow. Second operand has 15 states, 15 states have (on average 127.93333333333334) internal successors, (1919), 15 states have internal predecessors, (1919), 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) [2022-07-19 21:28:31,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:31,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 202 [2022-07-19 21:28:31,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:47,473 INFO L129 PetriNetUnfolder]: 93240/165958 cut-off events. [2022-07-19 21:28:47,473 INFO L130 PetriNetUnfolder]: For 11533/11533 co-relation queries the response was YES. [2022-07-19 21:28:48,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302885 conditions, 165958 events. 93240/165958 cut-off events. For 11533/11533 co-relation queries the response was YES. Maximal size of possible extension queue 3498. Compared 1709710 event pairs, 56436 based on Foata normal form. 9/165022 useless extension candidates. Maximal degree in co-relation 301046. Up to 76469 conditions per place. [2022-07-19 21:28:48,732 INFO L132 encePairwiseOnDemand]: 180/202 looper letters, 341 selfloop transitions, 31 changer transitions 30/509 dead transitions. [2022-07-19 21:28:48,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 509 transitions, 1948 flow [2022-07-19 21:28:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:28:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 21:28:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3610 transitions. [2022-07-19 21:28:48,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6873571972581873 [2022-07-19 21:28:48,752 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3610 transitions. [2022-07-19 21:28:48,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3610 transitions. [2022-07-19 21:28:48,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:48,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3610 transitions. [2022-07-19 21:28:48,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 138.84615384615384) internal successors, (3610), 26 states have internal predecessors, (3610), 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) [2022-07-19 21:28:48,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 202.0) internal successors, (5454), 27 states have internal predecessors, (5454), 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) [2022-07-19 21:28:48,782 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 202.0) internal successors, (5454), 27 states have internal predecessors, (5454), 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) [2022-07-19 21:28:48,784 INFO L186 Difference]: Start difference. First operand has 196 places, 185 transitions, 394 flow. Second operand 26 states and 3610 transitions. [2022-07-19 21:28:48,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 509 transitions, 1948 flow [2022-07-19 21:28:49,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 509 transitions, 1864 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:28:49,999 INFO L242 Difference]: Finished difference. Result has 220 places, 210 transitions, 543 flow [2022-07-19 21:28:50,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=543, PETRI_PLACES=220, PETRI_TRANSITIONS=210} [2022-07-19 21:28:50,004 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, 24 predicate places. [2022-07-19 21:28:50,005 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 210 transitions, 543 flow [2022-07-19 21:28:50,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 127.93333333333334) internal successors, (1919), 15 states have internal predecessors, (1919), 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) [2022-07-19 21:28:50,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:50,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:28:50,007 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 2 more)] === [2022-07-19 21:28:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1383593079, now seen corresponding path program 2 times [2022-07-19 21:28:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:50,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655725193] [2022-07-19 21:28:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:50,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655725193] [2022-07-19 21:28:50,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655725193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:50,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:50,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:28:50,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210199256] [2022-07-19 21:28:50,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:50,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:28:50,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:28:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:28:50,108 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 202 [2022-07-19 21:28:50,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 210 transitions, 543 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2022-07-19 21:28:50,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:50,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 202 [2022-07-19 21:28:50,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:28:58,178 INFO L129 PetriNetUnfolder]: 54028/98174 cut-off events. [2022-07-19 21:28:58,178 INFO L130 PetriNetUnfolder]: For 2539/2539 co-relation queries the response was YES. [2022-07-19 21:28:58,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183907 conditions, 98174 events. 54028/98174 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 973514 event pairs, 36143 based on Foata normal form. 2050/99561 useless extension candidates. Maximal degree in co-relation 183869. Up to 46800 conditions per place. [2022-07-19 21:28:58,941 INFO L132 encePairwiseOnDemand]: 197/202 looper letters, 81 selfloop transitions, 2 changer transitions 0/240 dead transitions. [2022-07-19 21:28:58,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 240 transitions, 772 flow [2022-07-19 21:28:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:28:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:28:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-07-19 21:28:58,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8646864686468647 [2022-07-19 21:28:58,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-07-19 21:28:58,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-07-19 21:28:58,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:28:58,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-07-19 21:28:58,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2022-07-19 21:28:58,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2022-07-19 21:28:58,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2022-07-19 21:28:58,947 INFO L186 Difference]: Start difference. First operand has 220 places, 210 transitions, 543 flow. Second operand 3 states and 524 transitions. [2022-07-19 21:28:58,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 240 transitions, 772 flow [2022-07-19 21:28:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 240 transitions, 762 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-07-19 21:28:58,990 INFO L242 Difference]: Finished difference. Result has 204 places, 210 transitions, 545 flow [2022-07-19 21:28:58,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=545, PETRI_PLACES=204, PETRI_TRANSITIONS=210} [2022-07-19 21:28:58,991 INFO L279 CegarLoopForPetriNet]: 196 programPoint places, 8 predicate places. [2022-07-19 21:28:58,992 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 210 transitions, 545 flow [2022-07-19 21:28:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2022-07-19 21:28:58,992 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:28:58,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:28:58,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:28:58,993 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 2 more)] === [2022-07-19 21:28:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:28:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1826355215, now seen corresponding path program 3 times [2022-07-19 21:28:58,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:28:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297628824] [2022-07-19 21:28:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:28:58,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:28:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:28:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:28:59,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:28:59,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297628824] [2022-07-19 21:28:59,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297628824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:28:59,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:28:59,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:28:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908990900] [2022-07-19 21:28:59,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:28:59,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:28:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:28:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:28:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:28:59,093 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 202 [2022-07-19 21:28:59,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 210 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2022-07-19 21:28:59,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:28:59,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 202 [2022-07-19 21:28:59,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand