./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --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/pthread-complex/workstealqueue_mutex-2.i -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 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:13:51,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:13:51,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:13:51,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:13:51,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:13:51,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:13:51,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:13:51,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:13:51,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:13:51,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:13:51,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:13:51,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:13:51,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:13:51,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:13:51,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:13:51,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:13:51,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:13:51,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:13:51,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:13:51,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:13:51,127 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:13:51,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:13:51,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:13:51,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:13:51,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:13:51,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:13:51,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:13:51,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:13:51,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:13:51,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:13:51,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:13:51,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:13:51,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:13:51,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:13:51,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:13:51,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:13:51,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:13:51,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:13:51,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:13:51,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:13:51,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:13:51,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:13:51,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:13:51,179 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:13:51,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:13:51,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:13:51,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:13:51,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:13:51,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:13:51,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:13:51,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:13:51,182 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:13:51,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:13:51,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:13:51,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:13:51,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:13:51,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:13:51,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:13:51,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:13:51,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:13:51,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:13:51,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:51,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:13:51,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:13:51,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:13:51,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:13:51,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:13:51,187 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:13:51,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:13:51,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:13:51,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2022-07-19 21:13:51,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:13:51,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:13:51,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:13:51,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:13:51,446 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:13:51,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-07-19 21:13:51,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afe58526f/c86c50d029ad47508d67bb85ca9d2181/FLAG2e0b92975 [2022-07-19 21:13:52,017 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:13:52,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2022-07-19 21:13:52,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afe58526f/c86c50d029ad47508d67bb85ca9d2181/FLAG2e0b92975 [2022-07-19 21:13:52,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afe58526f/c86c50d029ad47508d67bb85ca9d2181 [2022-07-19 21:13:52,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:13:52,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:13:52,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:52,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:13:52,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:13:52,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:52" (1/1) ... [2022-07-19 21:13:52,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c52a6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:52, skipping insertion in model container [2022-07-19 21:13:52,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:52" (1/1) ... [2022-07-19 21:13:52,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:13:52,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:13:52,982 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/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-07-19 21:13:53,009 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/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-07-19 21:13:53,016 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/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-07-19 21:13:53,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:53,046 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:13:53,093 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/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2022-07-19 21:13:53,107 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/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2022-07-19 21:13:53,109 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/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2022-07-19 21:13:53,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:53,196 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:13:53,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53 WrapperNode [2022-07-19 21:13:53,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:53,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:53,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:13:53,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:13:53,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,279 INFO L137 Inliner]: procedures = 489, calls = 128, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1729 [2022-07-19 21:13:53,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:53,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:13:53,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:13:53,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:13:53,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:13:53,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:13:53,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:13:53,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:13:53,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (1/1) ... [2022-07-19 21:13:53,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:13:53,426 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 21:13:53,458 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-07-19 21:13:53,433 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 21:13:53,460 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-07-19 21:13:53,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:13:53,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:13:53,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:13:53,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:13:53,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:13:53,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:13:53,463 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 21:13:53,750 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:13:53,751 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:13:54,945 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:13:55,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:13:55,216 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-19 21:13:55,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:55 BoogieIcfgContainer [2022-07-19 21:13:55,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:13:55,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:13:55,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:13:55,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:13:55,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:13:52" (1/3) ... [2022-07-19 21:13:55,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc5cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:55, skipping insertion in model container [2022-07-19 21:13:55,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:53" (2/3) ... [2022-07-19 21:13:55,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc5cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:55, skipping insertion in model container [2022-07-19 21:13:55,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:55" (3/3) ... [2022-07-19 21:13:55,227 INFO L111 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2022-07-19 21:13:55,234 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:13:55,241 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:13:55,241 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-19 21:13:55,242 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:13:55,350 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:13:55,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-19 21:13:56,327 INFO L129 PetriNetUnfolder]: 97/3125 cut-off events. [2022-07-19 21:13:56,328 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:13:56,383 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 3125 events. 97/3125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14512 event pairs, 0 based on Foata normal form. 0/3015 useless extension candidates. Maximal degree in co-relation 1594. Up to 10 conditions per place. [2022-07-19 21:13:56,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-19 21:13:56,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1635 places, 1684 transitions, 3376 flow [2022-07-19 21:13:56,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:56,431 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@3c69f2a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@360a6305 [2022-07-19 21:13:56,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:13:56,447 INFO L129 PetriNetUnfolder]: 11/179 cut-off events. [2022-07-19 21:13:56,447 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:13:56,447 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:56,448 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:56,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash -240515348, now seen corresponding path program 1 times [2022-07-19 21:13:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:56,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851879241] [2022-07-19 21:13:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:13:56,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:56,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851879241] [2022-07-19 21:13:56,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851879241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:56,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:56,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:13:56,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171067000] [2022-07-19 21:13:56,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:56,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:13:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:13:56,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:13:56,792 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1611 out of 1684 [2022-07-19 21:13:56,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 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 21:13:56,800 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:56,800 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1611 of 1684 [2022-07-19 21:13:56,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:58,967 INFO L129 PetriNetUnfolder]: 384/9309 cut-off events. [2022-07-19 21:13:58,967 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:13:59,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 9309 events. 384/9309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 79189 event pairs, 176 based on Foata normal form. 161/9221 useless extension candidates. Maximal degree in co-relation 8217. Up to 468 conditions per place. [2022-07-19 21:13:59,036 INFO L132 encePairwiseOnDemand]: 1668/1684 looper letters, 52 selfloop transitions, 0 changer transitions 0/1663 dead transitions. [2022-07-19 21:13:59,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1631 places, 1663 transitions, 3438 flow [2022-07-19 21:13:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:13:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:13:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3290 transitions. [2022-07-19 21:13:59,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768408551068883 [2022-07-19 21:13:59,057 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3290 transitions. [2022-07-19 21:13:59,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3290 transitions. [2022-07-19 21:13:59,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:59,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3290 transitions. [2022-07-19 21:13:59,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1645.0) internal successors, (3290), 2 states have internal predecessors, (3290), 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 21:13:59,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 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 21:13:59,084 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 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 21:13:59,085 INFO L186 Difference]: Start difference. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand 2 states and 3290 transitions. [2022-07-19 21:13:59,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1631 places, 1663 transitions, 3438 flow [2022-07-19 21:13:59,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1631 places, 1663 transitions, 3438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:59,116 INFO L242 Difference]: Finished difference. Result has 1631 places, 1663 transitions, 3334 flow [2022-07-19 21:13:59,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3334, PETRI_PLACES=1631, PETRI_TRANSITIONS=1663} [2022-07-19 21:13:59,122 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -4 predicate places. [2022-07-19 21:13:59,123 INFO L495 AbstractCegarLoop]: Abstraction has has 1631 places, 1663 transitions, 3334 flow [2022-07-19 21:13:59,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 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 21:13:59,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:59,125 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:59,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:13:59,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1112794349, now seen corresponding path program 1 times [2022-07-19 21:13:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700164885] [2022-07-19 21:13:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:13:59,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:59,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700164885] [2022-07-19 21:13:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700164885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:59,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:13:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010031917] [2022-07-19 21:13:59,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:59,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:13:59,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:59,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:13:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:13:59,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1573 out of 1684 [2022-07-19 21:13:59,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 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 21:13:59,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:59,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1573 of 1684 [2022-07-19 21:13:59,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:03,031 INFO L129 PetriNetUnfolder]: 751/14656 cut-off events. [2022-07-19 21:14:03,032 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:14:03,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 14656 events. 751/14656 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 131071 event pairs, 224 based on Foata normal form. 0/14284 useless extension candidates. Maximal degree in co-relation 15738. Up to 553 conditions per place. [2022-07-19 21:14:03,129 INFO L132 encePairwiseOnDemand]: 1666/1684 looper letters, 143 selfloop transitions, 12 changer transitions 9/1731 dead transitions. [2022-07-19 21:14:03,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1633 places, 1731 transitions, 3786 flow [2022-07-19 21:14:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:14:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:14:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4883 transitions. [2022-07-19 21:14:03,136 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.966547901821061 [2022-07-19 21:14:03,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4883 transitions. [2022-07-19 21:14:03,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4883 transitions. [2022-07-19 21:14:03,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:03,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4883 transitions. [2022-07-19 21:14:03,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1627.6666666666667) internal successors, (4883), 3 states have internal predecessors, (4883), 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 21:14:03,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 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 21:14:03,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 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 21:14:03,157 INFO L186 Difference]: Start difference. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand 3 states and 4883 transitions. [2022-07-19 21:14:03,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1633 places, 1731 transitions, 3786 flow [2022-07-19 21:14:03,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1633 places, 1731 transitions, 3786 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:14:03,181 INFO L242 Difference]: Finished difference. Result has 1634 places, 1660 transitions, 3382 flow [2022-07-19 21:14:03,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3382, PETRI_PLACES=1634, PETRI_TRANSITIONS=1660} [2022-07-19 21:14:03,184 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -1 predicate places. [2022-07-19 21:14:03,184 INFO L495 AbstractCegarLoop]: Abstraction has has 1634 places, 1660 transitions, 3382 flow [2022-07-19 21:14:03,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 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 21:14:03,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:03,187 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:03,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:14:03,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1114349984, now seen corresponding path program 1 times [2022-07-19 21:14:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091585537] [2022-07-19 21:14:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:03,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091585537] [2022-07-19 21:14:03,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091585537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:14:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765715484] [2022-07-19 21:14:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:03,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:03,368 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) [2022-07-19 21:14:03,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:14:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:03,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:14:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:14:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:03,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:14:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:03,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765715484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:14:03,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:14:03,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:14:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540453449] [2022-07-19 21:14:03,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:14:03,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:14:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:14:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:14:03,646 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-19 21:14:03,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 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 21:14:03,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:03,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-19 21:14:03,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:07,840 INFO L129 PetriNetUnfolder]: 869/15024 cut-off events. [2022-07-19 21:14:07,840 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-19 21:14:07,914 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 15024 events. 869/15024 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 132848 event pairs, 174 based on Foata normal form. 2/14664 useless extension candidates. Maximal degree in co-relation 16312. Up to 577 conditions per place. [2022-07-19 21:14:07,973 INFO L132 encePairwiseOnDemand]: 1663/1684 looper letters, 141 selfloop transitions, 26 changer transitions 2/1735 dead transitions. [2022-07-19 21:14:07,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1635 places, 1735 transitions, 3872 flow [2022-07-19 21:14:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:14:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:14:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14319 transitions. [2022-07-19 21:14:08,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9447743467933492 [2022-07-19 21:14:08,006 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14319 transitions. [2022-07-19 21:14:08,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14319 transitions. [2022-07-19 21:14:08,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:08,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14319 transitions. [2022-07-19 21:14:08,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1591.0) internal successors, (14319), 9 states have internal predecessors, (14319), 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 21:14:08,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 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 21:14:08,056 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 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 21:14:08,056 INFO L186 Difference]: Start difference. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand 9 states and 14319 transitions. [2022-07-19 21:14:08,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1635 places, 1735 transitions, 3872 flow [2022-07-19 21:14:08,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1634 places, 1735 transitions, 3860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:14:08,082 INFO L242 Difference]: Finished difference. Result has 1637 places, 1670 transitions, 3496 flow [2022-07-19 21:14:08,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=1637, PETRI_TRANSITIONS=1670} [2022-07-19 21:14:08,086 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 2 predicate places. [2022-07-19 21:14:08,086 INFO L495 AbstractCegarLoop]: Abstraction has has 1637 places, 1670 transitions, 3496 flow [2022-07-19 21:14:08,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 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 21:14:08,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:08,091 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:08,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:14:08,307 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 [2022-07-19 21:14:08,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1947084294, now seen corresponding path program 2 times [2022-07-19 21:14:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489683589] [2022-07-19 21:14:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:08,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:08,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489683589] [2022-07-19 21:14:08,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489683589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:14:08,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596545890] [2022-07-19 21:14:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:14:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:08,448 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) [2022-07-19 21:14:08,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:14:08,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:14:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:14:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:14:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:14:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:08,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:14:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:08,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596545890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:14:08,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:14:08,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-19 21:14:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351236838] [2022-07-19 21:14:08,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:14:08,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:14:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:14:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:14:08,871 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-19 21:14:08,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 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 21:14:08,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:08,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-19 21:14:08,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:14,012 INFO L129 PetriNetUnfolder]: 793/16490 cut-off events. [2022-07-19 21:14:14,013 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-19 21:14:14,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17857 conditions, 16490 events. 793/16490 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 148281 event pairs, 420 based on Foata normal form. 1/16097 useless extension candidates. Maximal degree in co-relation 17849. Up to 523 conditions per place. [2022-07-19 21:14:14,120 INFO L132 encePairwiseOnDemand]: 1664/1684 looper letters, 143 selfloop transitions, 29 changer transitions 0/1738 dead transitions. [2022-07-19 21:14:14,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1648 places, 1738 transitions, 3994 flow [2022-07-19 21:14:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:14:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:14:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 19037 transitions. [2022-07-19 21:14:14,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9420526524148852 [2022-07-19 21:14:14,143 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 19037 transitions. [2022-07-19 21:14:14,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 19037 transitions. [2022-07-19 21:14:14,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:14,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 19037 transitions. [2022-07-19 21:14:14,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1586.4166666666667) internal successors, (19037), 12 states have internal predecessors, (19037), 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 21:14:14,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 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 21:14:14,202 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 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 21:14:14,202 INFO L186 Difference]: Start difference. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand 12 states and 19037 transitions. [2022-07-19 21:14:14,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1648 places, 1738 transitions, 3994 flow [2022-07-19 21:14:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1647 places, 1738 transitions, 3970 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:14:14,232 INFO L242 Difference]: Finished difference. Result has 1651 places, 1674 transitions, 3589 flow [2022-07-19 21:14:14,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=1636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3589, PETRI_PLACES=1651, PETRI_TRANSITIONS=1674} [2022-07-19 21:14:14,236 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 16 predicate places. [2022-07-19 21:14:14,236 INFO L495 AbstractCegarLoop]: Abstraction has has 1651 places, 1674 transitions, 3589 flow [2022-07-19 21:14:14,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 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 21:14:14,240 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:14,240 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:14,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:14:14,459 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 [2022-07-19 21:14:14,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash 713479225, now seen corresponding path program 3 times [2022-07-19 21:14:14,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:14,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008895576] [2022-07-19 21:14:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:14:14,520 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:14:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:14:14,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:14:14,620 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:14:14,620 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:14:14,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:14:14,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:14:14,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:14:14,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:14:14,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:14:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:14:14,623 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-19 21:14:14,624 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:14:14,625 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:14:14,698 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:14:14,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-19 21:14:15,850 INFO L129 PetriNetUnfolder]: 152/4761 cut-off events. [2022-07-19 21:14:15,850 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:14:15,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 4761 events. 152/4761 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27571 event pairs, 0 based on Foata normal form. 0/4589 useless extension candidates. Maximal degree in co-relation 3127. Up to 15 conditions per place. [2022-07-19 21:14:15,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-19 21:14:16,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1782 places, 1834 transitions, 3686 flow [2022-07-19 21:14:16,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:14:16,013 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@3c69f2a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@360a6305 [2022-07-19 21:14:16,014 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:14:16,023 INFO L129 PetriNetUnfolder]: 12/200 cut-off events. [2022-07-19 21:14:16,024 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:14:16,024 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:16,024 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] [2022-07-19 21:14:16,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1822763458, now seen corresponding path program 1 times [2022-07-19 21:14:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:16,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701665343] [2022-07-19 21:14:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:16,065 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 21:14:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701665343] [2022-07-19 21:14:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701665343] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:16,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:16,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:14:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442899153] [2022-07-19 21:14:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:14:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:14:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:14:16,071 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1754 out of 1834 [2022-07-19 21:14:16,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand has 2 states, 2 states have (on average 1756.5) internal successors, (3513), 2 states have internal predecessors, (3513), 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 21:14:16,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:16,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1754 of 1834 [2022-07-19 21:14:16,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:28,779 INFO L129 PetriNetUnfolder]: 3062/49401 cut-off events. [2022-07-19 21:14:28,780 INFO L130 PetriNetUnfolder]: For 69/73 co-relation queries the response was YES. [2022-07-19 21:14:29,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52938 conditions, 49401 events. 3062/49401 cut-off events. For 69/73 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 639683 event pairs, 1964 based on Foata normal form. 1133/49213 useless extension candidates. Maximal degree in co-relation 9703. Up to 3491 conditions per place. [2022-07-19 21:14:29,359 INFO L132 encePairwiseOnDemand]: 1817/1834 looper letters, 58 selfloop transitions, 0 changer transitions 0/1812 dead transitions. [2022-07-19 21:14:29,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1778 places, 1812 transitions, 3758 flow [2022-07-19 21:14:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:14:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:14:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3583 transitions. [2022-07-19 21:14:29,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768266085059978 [2022-07-19 21:14:29,365 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3583 transitions. [2022-07-19 21:14:29,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3583 transitions. [2022-07-19 21:14:29,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:29,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3583 transitions. [2022-07-19 21:14:29,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1791.5) internal successors, (3583), 2 states have internal predecessors, (3583), 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 21:14:29,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 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 21:14:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 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 21:14:29,374 INFO L186 Difference]: Start difference. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand 2 states and 3583 transitions. [2022-07-19 21:14:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1778 places, 1812 transitions, 3758 flow [2022-07-19 21:14:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1778 places, 1812 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:14:29,397 INFO L242 Difference]: Finished difference. Result has 1778 places, 1812 transitions, 3642 flow [2022-07-19 21:14:29,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3642, PETRI_PLACES=1778, PETRI_TRANSITIONS=1812} [2022-07-19 21:14:29,400 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -4 predicate places. [2022-07-19 21:14:29,400 INFO L495 AbstractCegarLoop]: Abstraction has has 1778 places, 1812 transitions, 3642 flow [2022-07-19 21:14:29,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1756.5) internal successors, (3513), 2 states have internal predecessors, (3513), 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 21:14:29,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:29,402 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] [2022-07-19 21:14:29,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:14:29,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash 534649925, now seen corresponding path program 1 times [2022-07-19 21:14:29,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:29,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975786910] [2022-07-19 21:14:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:29,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:29,452 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 21:14:29,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975786910] [2022-07-19 21:14:29,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975786910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:29,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:29,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:14:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596455136] [2022-07-19 21:14:29,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:29,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:14:29,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:14:29,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:14:29,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1716 out of 1834 [2022-07-19 21:14:29,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 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 21:14:29,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:29,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1716 of 1834 [2022-07-19 21:14:29,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:00,924 INFO L129 PetriNetUnfolder]: 7534/98237 cut-off events. [2022-07-19 21:15:00,925 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-19 21:15:02,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107757 conditions, 98237 events. 7534/98237 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 1355966 event pairs, 3101 based on Foata normal form. 0/95615 useless extension candidates. Maximal degree in co-relation 107752. Up to 4939 conditions per place. [2022-07-19 21:15:02,987 INFO L132 encePairwiseOnDemand]: 1816/1834 looper letters, 162 selfloop transitions, 12 changer transitions 0/1890 dead transitions. [2022-07-19 21:15:02,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1780 places, 1890 transitions, 4152 flow [2022-07-19 21:15:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:15:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:15:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5328 transitions. [2022-07-19 21:15:03,005 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9683751363140676 [2022-07-19 21:15:03,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5328 transitions. [2022-07-19 21:15:03,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5328 transitions. [2022-07-19 21:15:03,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:03,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5328 transitions. [2022-07-19 21:15:03,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1776.0) internal successors, (5328), 3 states have internal predecessors, (5328), 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 21:15:03,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1834.0) internal successors, (7336), 4 states have internal predecessors, (7336), 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 21:15:03,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1834.0) internal successors, (7336), 4 states have internal predecessors, (7336), 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 21:15:03,017 INFO L186 Difference]: Start difference. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand 3 states and 5328 transitions. [2022-07-19 21:15:03,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1780 places, 1890 transitions, 4152 flow [2022-07-19 21:15:03,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1780 places, 1890 transitions, 4152 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:03,041 INFO L242 Difference]: Finished difference. Result has 1781 places, 1818 transitions, 3714 flow [2022-07-19 21:15:03,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3714, PETRI_PLACES=1781, PETRI_TRANSITIONS=1818} [2022-07-19 21:15:03,044 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -1 predicate places. [2022-07-19 21:15:03,044 INFO L495 AbstractCegarLoop]: Abstraction has has 1781 places, 1818 transitions, 3714 flow [2022-07-19 21:15:03,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 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 21:15:03,045 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:03,046 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:03,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:15:03,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:15:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1953570101, now seen corresponding path program 1 times [2022-07-19 21:15:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:03,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050890019] [2022-07-19 21:15:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:15:03,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050890019] [2022-07-19 21:15:03,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050890019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424155678] [2022-07-19 21:15:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:03,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:03,107 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) [2022-07-19 21:15:03,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:15:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:03,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:15:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:15:03,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:15:03,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424155678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:03,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:03,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:15:03,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180176726] [2022-07-19 21:15:03,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:03,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:15:03,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:15:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:15:03,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1715 out of 1834 [2022-07-19 21:15:03,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1781 places, 1818 transitions, 3714 flow. Second operand has 10 states, 10 states have (on average 1718.0) internal successors, (17180), 10 states have internal predecessors, (17180), 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 21:15:03,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:03,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1715 of 1834 [2022-07-19 21:15:03,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand